diff --git a/boot.php b/boot.php
index be97cab75..379d1bf3d 100644
--- a/boot.php
+++ b/boot.php
@@ -573,6 +573,51 @@ function x($s, $k = null)
 	}
 }
 
+/**
+ * Return the provided variable value if it exists and is truthy or the provided
+ * default value instead.
+ *
+ * Works with initialized variables and potentially uninitialized array keys
+ *
+ * Usages:
+ * - defaults($var, $default)
+ * - defaults($array, 'key', $default)
+ *
+ * @brief Returns a defaut value if the provided variable or array key is falsy
+ * @see x()
+ * @return mixed
+ */
+function defaults() {
+	$args = func_get_args();
+
+	if (count($args) < 2) {
+		throw new BadFunctionCallException('defaults() requires at least 2 parameters');
+	}
+	if (count($args) > 3) {
+		throw new BadFunctionCallException('defaults() cannot use more than 3 parameters');
+	}
+	if (count($args) === 3 && !is_array($args[0])) {
+		throw new BadFunctionCallException('defaults($arr, $key, $def) requires an array as first parameter');
+	}
+	if (count($args) === 3 && is_null($args[1])) {
+		throw new BadFunctionCallException('defaults($arr, $key, $def) $key is null');
+	}
+
+	$default = array_pop($args);
+
+	if (call_user_func_array('x', $args)) {
+		if (count($args) === 1) {
+			$return = $args[0];
+		} else {
+			$return = $args[0][$args[1]];
+		}
+	} else {
+		$return = $default;
+	}
+
+	return $return;
+}
+
 /**
  * @brief Returns the baseurl.
  *
@@ -1516,14 +1561,11 @@ function argv($x)
 function infinite_scroll_data($module)
 {
 	if (PConfig::get(local_user(), 'system', 'infinite_scroll')
-		&& ($module == "network") && ($_GET["mode"] != "minimal")
+		&& $module == 'network'
+		&& defaults($_GET, 'mode', '') != 'minimal'
 	) {
 		// get the page number
-		if (is_string($_GET["page"])) {
-			$pageno = $_GET["page"];
-		} else {
-			$pageno = 1;
-		}
+		$pageno = defaults($_GET, 'page', 1);
 
 		$reload_uri = "";
 
@@ -1534,7 +1576,8 @@ function infinite_scroll_data($module)
 			}
 		}
 
-		if (($a->page_offset != "") && ! strstr($reload_uri, "&offset=")) {
+		$a = get_app();
+		if ($a->page_offset != "" && !strstr($reload_uri, "&offset=")) {
 			$reload_uri .= "&offset=" . urlencode($a->page_offset);
 		}
 
diff --git a/include/bb2diaspora.php b/include/bb2diaspora.php
index e1a67d432..714d78004 100644
--- a/include/bb2diaspora.php
+++ b/include/bb2diaspora.php
@@ -7,7 +7,6 @@ use Friendica\Network\Probe;
 
 use League\HTMLToMarkdown\HtmlConverter;
 
-require_once 'include/oembed.php';
 require_once 'include/event.php';
 require_once 'library/markdown.php';
 require_once 'include/html2bbcode.php';
diff --git a/include/bbcode.php b/include/bbcode.php
index be59c1807..261bdfcf6 100644
--- a/include/bbcode.php
+++ b/include/bbcode.php
@@ -2,13 +2,13 @@
 
 use Friendica\App;
 use Friendica\Content\Smilies;
+use Friendica\Content\OEmbed;
 use Friendica\Core\Cache;
 use Friendica\Core\System;
 use Friendica\Core\Config;
 use Friendica\Model\Contact;
 use Friendica\Util\Map;
 
-require_once 'include/oembed.php';
 require_once 'include/event.php';
 require_once 'mod/proxy.php';
 require_once 'include/plaintext.php';
@@ -232,7 +232,7 @@ function tryoembed($match) {
 	$url = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
 				array("https://www.youtube.com/", "https://player.vimeo.com/"), $url);
 
-	$o = oembed_fetch_url($url);
+	$o = OEmbed::fetchURL($url);
 
 	if (!is_object($o)) {
 		return $match[0];
@@ -246,7 +246,7 @@ function tryoembed($match) {
 		return $match[0];
 	}
 
-	$html = oembed_format_object($o);
+	$html = OEmbed::formatObject($o);
 
 	return $html;
 }
@@ -435,60 +435,65 @@ function bb_replace_images($body, $images) {
 	return $newbody;
 }
 
-function bb_ShareAttributes($share, $simplehtml) {
+function bb_ShareAttributes($share, $simplehtml)
+{
 	$attributes = $share[2];
 
 	$author = "";
 	preg_match("/author='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "")
-		$author = html_entity_decode($matches[1],ENT_QUOTES,'UTF-8');
+	if (x($matches, 1)) {
+		$author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
+	}
 
 	preg_match('/author="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$author = $matches[1];
+	}
 
 	$profile = "";
 	preg_match("/profile='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$profile = $matches[1];
+	}
 
 	preg_match('/profile="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$profile = $matches[1];
+	}
 
 	$avatar = "";
 	preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$avatar = $matches[1];
+	}
 
 	preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$avatar = $matches[1];
+	}
 
 	$link = "";
 	preg_match("/link='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$link = $matches[1];
+	}
 
 	preg_match('/link="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$link = $matches[1];
+	}
 
 	$posted = "";
 
-	$itemcache = get_itemcachepath();
-
 	preg_match("/posted='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$posted = $matches[1];
+	}
 
 	preg_match('/posted="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "")
+	if (x($matches, 1)) {
 		$posted = $matches[1];
-
-	// relative dates only make sense when they aren't cached
-	if ($itemcache == "")
-		$reldate = (($posted) ? " " . relative_date($posted) : '');
+	}
 
 	// We only call this so that a previously unknown contact can be added.
 	// This is important for the function "get_contact_details_by_url".
@@ -497,99 +502,107 @@ function bb_ShareAttributes($share, $simplehtml) {
 
 	$data = Contact::getDetailsByURL($profile);
 
-	if (isset($data["name"]) && ($data["name"] != "") && isset($data["addr"]) && ($data["addr"] != ""))
-	        $userid_compact = $data["name"]." (".$data["addr"].")";
-	else
-		$userid_compact = GetProfileUsername($profile,$author, true);
+	if (x($data, "name") && x($data, "addr")) {
+		$userid_compact = $data["name"] . " (" . $data["addr"] . ")";
+	} else {
+		$userid_compact = GetProfileUsername($profile, $author, true);
+	}
 
-	if (isset($data["addr"]) && ($data["addr"] != ""))
+	if (x($data, "addr")) {
 		$userid = $data["addr"];
-	else
-		$userid = GetProfileUsername($profile,$author, false);
+	} else {
+		$userid = GetProfileUsername($profile, $author, false);
+	}
 
-	if (isset($data["name"]) && ($data["name"] != ""))
+	if (x($data, "name")) {
 		$author = $data["name"];
+	}
 
-	if (isset($data["micro"]) && ($data["micro"] != ""))
+	if (x($data, "micro")) {
 		$avatar = $data["micro"];
+	}
 
 	$preshare = trim($share[1]);
 
-	if ($preshare != "")
+	if ($preshare != "") {
 		$preshare .= "<br /><br />";
+	}
 
 	switch ($simplehtml) {
 		case 1:
-			$text = $preshare.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8').' <a href="'.$profile.'">'.$userid."</a>: <br />»".$share[3]."«";
+			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' <a href="' . $profile . '">' . $userid . "</a>: <br />»" . $share[3] . "«";
 			break;
 		case 2:
-			$text = $preshare.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8').' '.$userid_compact.": <br />".$share[3];
+			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
 			break;
 		case 3: // Diaspora
-			$headline .= '<b>'.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8').$userid.':</b><br />';
+			$headline .= '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';
 
 			$text = trim($share[1]);
 
-			if ($text != "")
+			if ($text != "") {
 				$text .= "<hr />";
+			}
 
 			if (substr(normalise_link($link), 0, 19) != "http://twitter.com/") {
-				$text .= $headline.'<blockquote>'.trim($share[3])."</blockquote><br />";
+				$text .= $headline . '<blockquote>' . trim($share[3]) . "</blockquote><br />";
 
-				if ($link != "")
-					$text .= '<br /><a href="'.$link.'">[l]</a>';
-			} else
-				$text .= '<br /><a href="'.$link.'">'.$link.'</a>';
+				if ($link != "") {
+					$text .= '<br /><a href="' . $link . '">[l]</a>';
+				}
+			} else {
+				$text .= '<br /><a href="' . $link . '">' . $link . '</a>';
+			}
 
 			break;
 		case 4:
-			$headline .= '<br /><b>'.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
-			$headline .= sprintf(t('<a href="%1$s" target="_blank">%2$s</a> %3$s'), $link, $userid, $posted);
+			$headline .= '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
+			$headline .= t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
 			$headline .= ":</b><br />";
 
 			$text = trim($share[1]);
 
-			if ($text != "")
+			if ($text != "") {
 				$text .= "<hr />";
+			}
 
-			$text .= $headline.'<blockquote class="shared_content">'.trim($share[3])."</blockquote><br />";
+			$text .= $headline . '<blockquote class="shared_content">' . trim($share[3]) . "</blockquote><br />";
 
 			break;
 		case 5:
-			$text = $preshare.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8').' '.$userid_compact.": <br />".$share[3];
+			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
 			break;
 		case 6: // app.net
-			$text = $preshare."&gt;&gt; @".$userid_compact.": <br />".$share[3];
+			$text = $preshare . "&gt;&gt; @" . $userid_compact . ": <br />" . $share[3];
 			break;
 		case 7: // statusnet/GNU Social
-			$text = $preshare.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8')." @".$userid_compact.": ".$share[3];
+			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . " @" . $userid_compact . ": " . $share[3];
 			break;
 		case 8: // twitter
-			$text = $preshare."RT @".$userid_compact.": ".$share[3];
+			$text = $preshare . "RT @" . $userid_compact . ": " . $share[3];
 			break;
 		case 9: // Google+/Facebook
-			$text = $preshare.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8').' '.$userid_compact.": <br />".$share[3];
+			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
 
-			if ($link != "")
-				$text .= "<br /><br />".$link;
+			if ($link != "") {
+				$text .= "<br /><br />" . $link;
+			}
 			break;
 		default:
-			$text = trim($share[1])."\n";
+			$text = trim($share[1]) . "\n";
 
 			$avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);
 
 			$tpl = get_markup_template('shared_content.tpl');
-			$text .= replace_macros($tpl,
-					array(
-						'$profile' => $profile,
-						'$avatar' => $avatar,
-						'$author' => $author,
-						'$link' => $link,
-						'$posted' => $posted,
-						'$reldate' => $reldate,
-						'$content' => trim($share[3])
-					)
-				);
+			$text .= replace_macros($tpl, array(
+					'$profile' => $profile,
+					'$avatar' => $avatar,
+					'$author' => $author,
+					'$link' => $link,
+					'$posted' => $posted,
+					'$content' => trim($share[3])
+				)
+			);
 			break;
 	}
 
@@ -1263,7 +1276,7 @@ function bbcode($Text, $preserve_nl = false, $tryoembed = true, $simplehtml = fa
 //	$Text = preg_replace("/\[youtube\](.*?)\[\/youtube\]/", '<object width="425" height="350" type="application/x-shockwave-flash" data="http://www.youtube.com/v/$1" ><param name="movie" value="http://www.youtube.com/v/$1"></param><!--[if IE]><embed src="http://www.youtube.com/v/$1" type="application/x-shockwave-flash" width="425" height="350" /><![endif]--></object>', $Text);
 
 	// oembed tag
-	$Text = oembed_bbcode2html($Text);
+	$Text = OEmbed::BBCode2HTML($Text);
 
 	// Avoid triple linefeeds through oembed
 	$Text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $Text);
diff --git a/include/conversation.php b/include/conversation.php
index ee68d8f5c..958d507d7 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -545,8 +545,10 @@ function conversation(App $a, $items, $mode, $update, $preview = false) {
 		$profile_owner = $a->profile['profile_uid'];
 
 		if (!$update) {
-			$tab = notags(trim($_GET['tab']));
-			$tab = ( $tab ? $tab : 'posts' );
+			$tab = 'posts';
+			if (x($_GET, 'tab')) {
+				$tab = notags(trim($_GET['tab']));
+			}
 			if ($tab === 'posts') {
 				/*
 				 * This is ugly, but we can't pass the profile_uid through the session to the ajax updater,
@@ -647,20 +649,10 @@ function conversation(App $a, $items, $mode, $update, $preview = false) {
 
 				$threadsid++;
 
-				$comment     = '';
 				$owner_url   = '';
 				$owner_name  = '';
 				$sparkle     = '';
 
-				if ($mode === 'search' || $mode === 'community') {
-					if (((activity_match($item['verb'], ACTIVITY_LIKE)) || (activity_match($item['verb'], ACTIVITY_DISLIKE)))
-						&& ($item['id'] != $item['parent']))
-						continue;
-					$nickname = $item['nickname'];
-				} else {
-					$nickname = $a->user['nickname'];
-				}
-
 				// prevent private email from leaking.
 				if ($item['network'] === NETWORK_MAIL && local_user() != $item['uid']) {
 					continue;
@@ -813,7 +805,6 @@ function conversation(App $a, $items, $mode, $update, $preview = false) {
 					'like' => '',
 					'dislike' => '',
 					'comment' => '',
-					//'conv' => (($preview) ? '' : array('href'=> 'display/' . $nickname . '/' . $item['id'], 'title'=> t('View in context'))),
 					'conv' => (($preview) ? '' : array('href'=> 'display/'.$item['guid'], 'title'=> t('View in context'))),
 					'previewing' => $previewing,
 					'wait' => t('Please wait'),
@@ -1197,39 +1188,40 @@ function format_like($cnt, array $arr, $type, $id) {
 	return $o;
 }
 
-function status_editor(App $a, $x, $notes_cid = 0, $popup = false) {
+function status_editor(App $a, $x, $notes_cid = 0, $popup = false)
+{
 	$o = '';
 
-	$geotag = (x($x, 'allow_location') ? replace_macros(get_markup_template('jot_geotag.tpl'), array()) : '');
+	$geotag = x($x, 'allow_location') ? replace_macros(get_markup_template('jot_geotag.tpl'), array()) : '';
 
 	$tpl = get_markup_template('jot-header.tpl');
 	$a->page['htmlhead'] .= replace_macros($tpl, array(
-		'$newpost' => 'true',
-		'$baseurl' => System::baseUrl(true),
-		'$geotag' => $geotag,
-		'$nickname' => $x['nickname'],
-		'$ispublic' => t('Visible to <strong>everybody</strong>'),
-		'$linkurl' => t('Please enter a link URL:'),
-		'$vidurl' => t("Please enter a video link/URL:"),
-		'$audurl' => t("Please enter an audio link/URL:"),
-		'$term' => t('Tag term:'),
-		'$fileas' => t('Save to Folder:'),
+		'$newpost'   => 'true',
+		'$baseurl'   => System::baseUrl(true),
+		'$geotag'    => $geotag,
+		'$nickname'  => $x['nickname'],
+		'$ispublic'  => t('Visible to <strong>everybody</strong>'),
+		'$linkurl'   => t('Please enter a link URL:'),
+		'$vidurl'    => t("Please enter a video link/URL:"),
+		'$audurl'    => t("Please enter an audio link/URL:"),
+		'$term'      => t('Tag term:'),
+		'$fileas'    => t('Save to Folder:'),
 		'$whereareu' => t('Where are you right now?'),
-		'$delitems' => t('Delete item(s)?')
+		'$delitems'  => t('Delete item(s)?')
 	));
 
 	$tpl = get_markup_template('jot-end.tpl');
 	$a->page['end'] .= replace_macros($tpl, array(
-		'$newpost' => 'true',
-		'$baseurl' => System::baseUrl(true),
-		'$geotag' => $geotag,
-		'$nickname' => $x['nickname'],
-		'$ispublic' => t('Visible to <strong>everybody</strong>'),
-		'$linkurl' => t('Please enter a link URL:'),
-		'$vidurl' => t("Please enter a video link/URL:"),
-		'$audurl' => t("Please enter an audio link/URL:"),
-		'$term' => t('Tag term:'),
-		'$fileas' => t('Save to Folder:'),
+		'$newpost'   => 'true',
+		'$baseurl'   => System::baseUrl(true),
+		'$geotag'    => $geotag,
+		'$nickname'  => $x['nickname'],
+		'$ispublic'  => t('Visible to <strong>everybody</strong>'),
+		'$linkurl'   => t('Please enter a link URL:'),
+		'$vidurl'    => t("Please enter a video link/URL:"),
+		'$audurl'    => t("Please enter an audio link/URL:"),
+		'$term'      => t('Tag term:'),
+		'$fileas'    => t('Save to Folder:'),
 		'$whereareu' => t('Where are you right now?')
 	));
 
@@ -1262,57 +1254,56 @@ function status_editor(App $a, $x, $notes_cid = 0, $popup = false) {
 	$tpl = get_markup_template("jot.tpl");
 
 	$o .= replace_macros($tpl,array(
-		'$return_path' => $query_str,
-		'$action' =>  'item',
-		'$share' => (x($x,'button') ? $x['button'] : t('Share')),
-		'$upload' => t('Upload photo'),
-		'$shortupload' => t('upload photo'),
-		'$attach' => t('Attach file'),
-		'$shortattach' => t('attach file'),
-		'$weblink' => t('Insert web link'),
+		'$return_path'  => $query_str,
+		'$action'       => 'item',
+		'$share'        => defaults($x, 'button', t('Share')),
+		'$upload'       => t('Upload photo'),
+		'$shortupload'  => t('upload photo'),
+		'$attach'       => t('Attach file'),
+		'$shortattach'  => t('attach file'),
+		'$weblink'      => t('Insert web link'),
 		'$shortweblink' => t('web link'),
-		'$video' => t('Insert video link'),
-		'$shortvideo' => t('video link'),
-		'$audio' => t('Insert audio link'),
-		'$shortaudio' => t('audio link'),
-		'$setloc' => t('Set your location'),
-		'$shortsetloc' => t('set location'),
-		'$noloc' => t('Clear browser location'),
-		'$shortnoloc' => t('clear location'),
-		'$title' => $x['title'],
+		'$video'        => t('Insert video link'),
+		'$shortvideo'   => t('video link'),
+		'$audio'        => t('Insert audio link'),
+		'$shortaudio'   => t('audio link'),
+		'$setloc'       => t('Set your location'),
+		'$shortsetloc'  => t('set location'),
+		'$noloc'        => t('Clear browser location'),
+		'$shortnoloc'   => t('clear location'),
+		'$title'        => defaults($x, 'title', ''),
 		'$placeholdertitle' => t('Set title'),
-		'$category' => $x['category'],
-		'$placeholdercategory' => (Feature::isEnabled(local_user(), 'categories') ? t('Categories (comma-separated list)') : ''),
-		'$wait' => t('Please wait'),
-		'$permset' => t('Permission settings'),
+		'$category'     => defaults($x, 'category', ''),
+		'$placeholdercategory' => Feature::isEnabled(local_user(), 'categories') ? t('Categories (comma-separated list)') : '',
+		'$wait'         => t('Please wait'),
+		'$permset'      => t('Permission settings'),
 		'$shortpermset' => t('permissions'),
-		'$ptyp' => (($notes_cid) ? 'note' : 'wall'),
-		'$content' => $x['content'],
-		'$post_id' => $x['post_id'],
-		'$baseurl' => System::baseUrl(true),
-		'$defloc' => $x['default_location'],
-		'$visitor' => $x['visitor'],
-		'$pvisit' => (($notes_cid) ? 'none' : $x['visitor']),
-		'$public' => t('Public post'),
-		'$jotnets' => $jotnets,
-		'$lockstate' => $x['lockstate'],
-		'$bang' => $x['bang'],
-		'$profile_uid' => $x['profile_uid'],
-		'$preview' => ((Feature::isEnabled($x['profile_uid'],'preview')) ? t('Preview') : ''),
-		'$jotplugins' => $jotplugins,
-		'$notes_cid' => $notes_cid,
-		'$sourceapp' => t($a->sourcename),
-		'$cancel' => t('Cancel'),
-		'$rand_num' => random_digits(12),
+		'$ptyp'         => $notes_cid ? 'note' : 'wall',
+		'$content'      => defaults($x, 'content', ''),
+		'$post_id'      => defaults($x, 'post_id', ''),
+		'$baseurl'      => System::baseUrl(true),
+		'$defloc'       => $x['default_location'],
+		'$visitor'      => $x['visitor'],
+		'$pvisit'       => $notes_cid ? 'none' : $x['visitor'],
+		'$public'       => t('Public post'),
+		'$lockstate'    => $x['lockstate'],
+		'$bang'         => $x['bang'],
+		'$profile_uid'  => $x['profile_uid'],
+		'$preview'      => Feature::isEnabled($x['profile_uid'], 'preview') ? t('Preview') : '',
+		'$jotplugins'   => $jotplugins,
+		'$notes_cid'    => $notes_cid,
+		'$sourceapp'    => t($a->sourcename),
+		'$cancel'       => t('Cancel'),
+		'$rand_num'     => random_digits(12),
 
 		// ACL permissions box
-		'$acl' => $x['acl'],
-		'$acl_data' => $x['acl_data'],
-		'$group_perms' => t('Post to Groups'),
+		'$acl'           => $x['acl'],
+		'$acl_data'      => $x['acl_data'],
+		'$group_perms'   => t('Post to Groups'),
 		'$contact_perms' => t('Post to Contacts'),
-		'$private' => t('Private post'),
-		'$is_private' => $private_post,
-		'$public_link' => $public_post_link,
+		'$private'       => t('Private post'),
+		'$is_private'    => $private_post,
+		'$public_link'   => $public_post_link,
 
 		//jot nav tab (used in some themes)
 		'$message' => t('Message'),
@@ -1321,7 +1312,7 @@ function status_editor(App $a, $x, $notes_cid = 0, $popup = false) {
 
 
 	if ($popup == true) {
-		$o = '<div id="jot-popup" style="display: none;">'.$o.'</div>';
+		$o = '<div id="jot-popup" style="display: none;">' . $o . '</div>';
 	}
 
 	return $o;
@@ -1577,9 +1568,9 @@ function get_responses($conv_responses, $response_verbs, $ob, $item) {
 	$ret = array();
 	foreach ($response_verbs as $v) {
 		$ret[$v] = array();
-		$ret[$v]['count'] = ((x($conv_responses[$v], $item['uri'])) ? $conv_responses[$v][$item['uri']] : '');
-		$ret[$v]['list']  = ((x($conv_responses[$v], $item['uri'])) ? $conv_responses[$v][$item['uri'] . '-l'] : '');
-		$ret[$v]['self']  = ((x($conv_responses[$v], $item['uri'])) ? $conv_responses[$v][$item['uri'] . '-self'] : '0');
+		$ret[$v]['count'] = defaults($conv_responses[$v], $item['uri'], '');
+		$ret[$v]['list']  = defaults($conv_responses[$v], $item['uri'] . '-l', '');
+		$ret[$v]['self']  = defaults($conv_responses[$v], $item['uri'] . '-self', '0');
 		if (count($ret[$v]['list']) > MAX_LIKERS) {
 			$ret[$v]['list_part'] = array_slice($ret[$v]['list'], 0, MAX_LIKERS);
 			array_push($ret[$v]['list_part'], '<a href="#" data-toggle="modal" data-target="#' . $v . 'Modal-'
diff --git a/include/crypto.php b/include/crypto.php
deleted file mode 100644
index dfc44c179..000000000
--- a/include/crypto.php
+++ /dev/null
@@ -1,172 +0,0 @@
-<?php
-
-use Friendica\Core\Config;
-
-require_once 'library/ASNValue.class.php';
-require_once 'library/asn1.php';
-
-// supported algorithms are 'sha256', 'sha1'
-
-function rsa_sign($data, $key, $alg = 'sha256') {
-	openssl_sign($data, $sig, $key, (($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
-	return $sig;
-}
-
-function rsa_verify($data, $sig, $key, $alg = 'sha256') {
-	return openssl_verify($data, $sig, $key, (($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
-}
-
-function DerToPem($Der, $Private = false) {
-	//Encode:
-	$Der = base64_encode($Der);
-	//Split lines:
-	$lines = str_split($Der, 65);
-	$body = implode("\n", $lines);
-	//Get title:
-	$title = $Private ? 'RSA PRIVATE KEY' : 'PUBLIC KEY';
-	//Add wrapping:
-	$result = "-----BEGIN {$title}-----\n";
-	$result .= $body . "\n";
-	$result .= "-----END {$title}-----\n";
-
-	return $result;
-}
-
-function DerToRsa($Der) {
-	//Encode:
-	$Der = base64_encode($Der);
-	//Split lines:
-	$lines = str_split($Der, 64);
-	$body = implode("\n", $lines);
-	//Get title:
-	$title = 'RSA PUBLIC KEY';
-	//Add wrapping:
-	$result = "-----BEGIN {$title}-----\n";
-	$result .= $body . "\n";
-	$result .= "-----END {$title}-----\n";
-
-	return $result;
-}
-
-function pkcs8_encode($Modulus, $PublicExponent) {
-	//Encode key sequence
-	$modulus = new ASNValue(ASNValue::TAG_INTEGER);
-	$modulus->SetIntBuffer($Modulus);
-	$publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
-	$publicExponent->SetIntBuffer($PublicExponent);
-	$keySequenceItems = array($modulus, $publicExponent);
-	$keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
-	$keySequence->SetSequence($keySequenceItems);
-	//Encode bit string
-	$bitStringValue = $keySequence->Encode();
-	$bitStringValue = chr(0x00) . $bitStringValue; //Add unused bits byte
-	$bitString = new ASNValue(ASNValue::TAG_BITSTRING);
-	$bitString->Value = $bitStringValue;
-	//Encode body
-	$bodyValue = "\x30\x0d\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01\x05\x00" . $bitString->Encode();
-	$body = new ASNValue(ASNValue::TAG_SEQUENCE);
-	$body->Value = $bodyValue;
-	//Get DER encoded public key:
-	$PublicDER = $body->Encode();
-	return $PublicDER;
-}
-
-function pkcs1_encode($Modulus, $PublicExponent) {
-	//Encode key sequence
-	$modulus = new ASNValue(ASNValue::TAG_INTEGER);
-	$modulus->SetIntBuffer($Modulus);
-	$publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
-	$publicExponent->SetIntBuffer($PublicExponent);
-	$keySequenceItems = array($modulus, $publicExponent);
-	$keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
-	$keySequence->SetSequence($keySequenceItems);
-	//Encode bit string
-	$bitStringValue = $keySequence->Encode();
-	return $bitStringValue;
-}
-
-function metopem($m, $e) {
-	$der = pkcs8_encode($m, $e);
-	$key = DerToPem($der, false);
-	return $key;
-}
-
-function pubrsatome($key, &$m, &$e)
-{
-	require_once 'library/asn1.php';
-
-	$lines = explode("\n", $key);
-	unset($lines[0]);
-	unset($lines[count($lines)]);
-	$x = base64_decode(implode('', $lines));
-
-	$r = ASN_BASE::parseASNString($x);
-
-	$m = base64url_decode($r[0]->asnData[0]->asnData);
-	$e = base64url_decode($r[0]->asnData[1]->asnData);
-}
-
-
-function rsatopem($key) {
-	pubrsatome($key, $m, $e);
-	return metopem($m, $e);
-}
-
-function pemtorsa($key) {
-	pemtome($key, $m, $e);
-	return metorsa($m, $e);
-}
-
-function pemtome($key, &$m, &$e)
-{
-	$lines = explode("\n", $key);
-	unset($lines[0]);
-	unset($lines[count($lines)]);
-	$x = base64_decode(implode('', $lines));
-
-	$r = ASN_BASE::parseASNString($x);
-
-	$m = base64url_decode($r[0]->asnData[1]->asnData[0]->asnData[0]->asnData);
-	$e = base64url_decode($r[0]->asnData[1]->asnData[0]->asnData[1]->asnData);
-}
-
-function metorsa($m, $e) {
-	$der = pkcs1_encode($m, $e);
-	$key = DerToRsa($der);
-	return $key;
-}
-
-function salmon_key($pubkey) {
-	pemtome($pubkey, $m, $e);
-	return 'RSA' . '.' . base64url_encode($m, true) . '.' . base64url_encode($e, true) ;
-}
-
-function new_keypair($bits) {
-	$openssl_options = array(
-		'digest_alg'       => 'sha1',
-		'private_key_bits' => $bits,
-		'encrypt_key'      => false
-	);
-
-	$conf = Config::get('system', 'openssl_conf_file');
-	if ($conf) {
-		$openssl_options['config'] = $conf;
-	}
-	$result = openssl_pkey_new($openssl_options);
-
-	if (empty($result)) {
-		logger('new_keypair: failed');
-		return false;
-	}
-
-	// Get private key
-	$response = array('prvkey' => '', 'pubkey' => '');
-
-	openssl_pkey_export($result, $response['prvkey']);
-
-	// Get public key
-	$pkey = openssl_pkey_get_details($result);
-	$response['pubkey'] = $pkey["key"];
-
-	return $response;
-}
diff --git a/include/event.php b/include/event.php
index bc9467dc8..584a70767 100644
--- a/include/event.php
+++ b/include/event.php
@@ -13,7 +13,7 @@ use Friendica\Util\Map;
 
 require_once 'include/bbcode.php';
 require_once 'include/datetime.php';
-require_once "include/conversation.php";
+require_once 'include/conversation.php';
 
 function format_event_html($ev, $simple = false) {
 	if (! ((is_array($ev)) && count($ev))) {
@@ -88,7 +88,7 @@ function format_event_html($ev, $simple = false) {
 
 /**
  * @brief Convert an array with event data to bbcode.
- * 
+ *
  * @param array $ev Array which conains the event data.
  * @return string The event as a bbcode formatted string.
  */
@@ -126,7 +126,7 @@ function format_event_bbcode($ev) {
 /**
  * @brief Extract bbcode formatted event data from a string
  *     and convert it to html.
- * 
+ *
  * @params: string $s The string which should be parsed for event data.
  * @return string The html output.
  */
@@ -143,7 +143,7 @@ function bbtovcal($s) {
 
 /**
  * @brief Extract bbcode formatted event data from a string.
- * 
+ *
  * @params: string $s The string which should be parsed for event data.
  * @return array The array with the event information.
  */
@@ -206,10 +206,10 @@ function ev_compare($a,$b) {
 
 /**
  * @brief Delete an event from the event table.
- * 
+ *
  * Note: This function does only delete the event from the event table not its
  * related entry in the item table.
- * 
+ *
  * @param int $event_id Event ID.
  * @return void
  */
@@ -224,9 +224,9 @@ function event_delete($event_id) {
 
 /**
  * @brief Store the event.
- * 
+ *
  * Store the event in the event table and create an event item in the item table.
- * 
+ *
  * @param array $arr Array with event data.
  * @return int The event id.
  */
@@ -433,7 +433,7 @@ function event_store($arr) {
 
 /**
  * @brief Create an array with translation strings used for events.
- * 
+ *
  * @return array Array with translations strings.
  */
 function get_event_strings() {
@@ -564,7 +564,7 @@ function event_by_id($owner_uid = 0, $event_params, $sql_extra = '') {
  *	string 'adjust_start' =>
  *
  * @param string $sql_extra Additional sql conditions (e.g. permission request).
- * 
+ *
  * @return array Query results.
  */
 function events_by_date($owner_uid = 0, $event_params, $sql_extra = '') {
@@ -626,6 +626,9 @@ function process_events($arr) {
 
 			// Show edit and drop actions only if the user is the owner of the event and the event
 			// is a real event (no bithdays).
+			$edit = null;
+			$copy = null;
+			$drop = null;
 			if (local_user() && local_user() == $rr['uid'] && $rr['type'] == 'event') {
 				$edit = ((! $rr['cid']) ? array(System::baseUrl() . '/events/event/' . $rr['id'], t('Edit event'), '', '') : null);
 				$copy = ((! $rr['cid']) ? array(System::baseUrl() . '/events/copy/' . $rr['id'], t('Duplicate event'), '', '') : null);
@@ -768,7 +771,7 @@ function event_format_export ($events, $format = 'ical', $timezone) {
 
 /**
  * @brief Get all events for a user ID.
- * 
+ *
  *    The query for events is done permission sensitive.
  *    If the user is the owner of the calendar he/she
  *    will get all of his/her available events.
@@ -922,7 +925,7 @@ function widget_events() {
 
 /**
  * @brief Format an item array with event data to HTML.
- * 
+ *
  * @param arr $item Array with item and event data.
  * @return string HTML output.
  */
@@ -1013,12 +1016,12 @@ function format_event_item($item) {
 
 /**
  * @brief Format a string with map bbcode to an array with location data.
- * 
+ *
  * Note: The string must only contain location data. A string with no bbcode will be
  * handled as location name.
- * 
+ *
  * @param string $s The string with the bbcode formatted location data.
- * 
+ *
  * @return array The array with the location data.
  *  'name' => The name of the location,<br>
  * 'address' => The address of the location,<br>
diff --git a/include/identity.php b/include/identity.php
index 9c315efbd..d78935778 100644
--- a/include/identity.php
+++ b/include/identity.php
@@ -1,8 +1,8 @@
 <?php
+
 /**
  * @file include/identity.php
  */
-
 use Friendica\App;
 use Friendica\Content\Feature;
 use Friendica\Content\ForumManager;
@@ -50,13 +50,25 @@ function profile_load(App $a, $nickname, $profile = 0, $profiledata = array(), $
 		dbesc($nickname)
 	);
 
-	if (!$user && count($user) && !count($profiledata)) {
+	if (!$user && !count($user) && !count($profiledata)) {
 		logger('profile error: ' . $a->query_string, LOGGER_DEBUG);
 		notice(t('Requested account is not available.') . EOL);
 		$a->error = 404;
 		return;
 	}
 
+	if (!x($a->page, 'aside')) {
+		$a->page['aside'] = '';
+	}
+
+	if ($profiledata) {
+		$a->page['aside'] .= profile_sidebar($profiledata, true, $show_connect);
+
+		if (!DBM::is_result($user)) {
+			return;
+		}
+	}
+
 	$pdata = get_profiledata_by_nick($nickname, $user[0]['uid'], $profile);
 
 	if (empty($pdata) && empty($profiledata)) {
@@ -73,8 +85,9 @@ function profile_load(App $a, $nickname, $profile = 0, $profiledata = array(), $
 			"SELECT `pub_keywords` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 			intval($pdata['profile_uid'])
 		);
-		if ($x && count($x))
+		if ($x && count($x)) {
 			$pdata['pub_keywords'] = $x[0]['pub_keywords'];
+		}
 	}
 
 	$a->profile = $pdata;
@@ -83,9 +96,9 @@ function profile_load(App $a, $nickname, $profile = 0, $profiledata = array(), $
 	$a->profile['mobile-theme'] = PConfig::get($a->profile['profile_uid'], 'system', 'mobile_theme');
 	$a->profile['network'] = NETWORK_DFRN;
 
-	$a->page['title'] = $a->profile['name'] . " @ " . $a->config['sitename'];
+	$a->page['title'] = $a->profile['name'] . ' @ ' . $a->config['sitename'];
 
-	if (!$profiledata  && !PConfig::get(local_user(), 'system', 'always_my_theme')) {
+	if (!$profiledata && !PConfig::get(local_user(), 'system', 'always_my_theme')) {
 		$_SESSION['theme'] = $a->profile['theme'];
 	}
 
@@ -97,19 +110,18 @@ function profile_load(App $a, $nickname, $profile = 0, $profiledata = array(), $
 
 	$a->set_template_engine(); // reset the template engine to the default in case the user's theme doesn't specify one
 
-	$theme_info_file = "view/theme/" . current_theme() . "/theme.php";
+	$theme_info_file = 'view/theme/' . current_theme() . '/theme.php';
 	if (file_exists($theme_info_file)) {
 		require_once $theme_info_file;
 	}
 
-	if (! (x($a->page, 'aside'))) {
+	if (!x($a->page, 'aside')) {
 		$a->page['aside'] = '';
 	}
 
 	if (local_user() && local_user() == $a->profile['uid'] && $profiledata) {
 		$a->page['aside'] .= replace_macros(
-			get_markup_template('profile_edlink.tpl'),
-			array(
+			get_markup_template('profile_edlink.tpl'), array(
 				'$editprofile' => t('Edit profile'),
 				'$profid' => $a->profile['id']
 			)
@@ -123,19 +135,13 @@ function profile_load(App $a, $nickname, $profile = 0, $profiledata = array(), $
 	 * By now, the contact block isn't shown, when a different profile is given
 	 * But: When this profile was on the same server, then we could display the contacts
 	 */
-	if ($profiledata) {
-		$a->page['aside'] .= profile_sidebar($profiledata, true, $show_connect);
-	} else {
+	if (!$profiledata) {
 		$a->page['aside'] .= profile_sidebar($a->profile, $block, $show_connect);
 	}
 
-	/*if (! $block)
-	 $a->page['aside'] .= contact_block();*/
-
 	return;
 }
 
-
 /**
  * @brief Get all profil data of a local user
  *
@@ -144,11 +150,12 @@ function profile_load(App $a, $nickname, $profile = 0, $profiledata = array(), $
  * Passing a non-zero profile ID can also allow a preview of a selected profile
  * by the owner
  *
+ * Includes all available profile data
+ *
  * @param string $nickname nick
  * @param int    $uid      uid
  * @param int    $profile  ID of the profile
  * @returns array
- *	Includes all available profile data
  */
 function get_profiledata_by_nick($nickname, $uid = 0, $profile = 0)
 {
@@ -198,7 +205,6 @@ function get_profiledata_by_nick($nickname, $uid = 0, $profile = 0)
 	return $r;
 }
 
-
 /**
  * @brief Formats a profile for display in the sidebar.
  *
@@ -225,28 +231,27 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 	$o = '';
 	$location = false;
 	$address = false;
-	// $pdesc = true;
 
 	// This function can also use contact information in $profile
 	$is_contact = x($profile, 'cid');
 
-	if ((! is_array($profile)) && (! count($profile))) {
+	if (!is_array($profile) && !count($profile)) {
 		return $o;
 	}
 
-	$profile['picdate'] = urlencode($profile['picdate']);
+	$profile['picdate'] = urlencode(defaults($profile, 'picdate', ''));
 
-	if (($profile['network'] != "") && ($profile['network'] != NETWORK_DFRN)) {
+	if (($profile['network'] != '') && ($profile['network'] != NETWORK_DFRN)) {
 		$profile['network_name'] = format_network_name($profile['network'], $profile['url']);
 	} else {
-		$profile['network_name'] = "";
+		$profile['network_name'] = '';
 	}
 
 	call_hooks('profile_sidebar_enter', $profile);
 
 
 	// don't show connect link to yourself
-	$connect = (($profile['uid'] != local_user()) ? t('Connect')  : false);
+	$connect = $profile['uid'] != local_user() ? t('Connect') : false;
 
 	// don't show connect link to authenticated visitors either
 	if (remote_user() && count($_SESSION['remote'])) {
@@ -264,10 +269,10 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 
 	// Is the local user already connected to that user?
 	if ($connect && local_user()) {
-		if (isset($profile["url"])) {
-			$profile_url = normalise_link($profile["url"]);
+		if (isset($profile['url'])) {
+			$profile_url = normalise_link($profile['url']);
 		} else {
-			$profile_url = normalise_link(System::baseUrl()."/profile/".$profile["nickname"]);
+			$profile_url = normalise_link(System::baseUrl() . '/profile/' . $profile['nickname']);
 		}
 
 		if (dba::exists('contact', array('pending' => false, 'uid' => local_user(), 'nurl' => $profile_url))) {
@@ -275,21 +280,24 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 		}
 	}
 
-	if ($connect && ($profile['network'] != NETWORK_DFRN) && !isset($profile['remoteconnect']))
+	if ($connect && ($profile['network'] != NETWORK_DFRN) && !isset($profile['remoteconnect'])) {
 		$connect = false;
+	}
 
 	$remoteconnect = null;
-	if (isset($profile['remoteconnect']))
+	if (isset($profile['remoteconnect'])) {
 		$remoteconnect = $profile['remoteconnect'];
+	}
 
-	if ($connect && ($profile['network'] == NETWORK_DFRN) && !isset($remoteconnect))
-		$subscribe_feed = t("Atom feed");
-	else
+	if ($connect && ($profile['network'] == NETWORK_DFRN) && !isset($remoteconnect)) {
+		$subscribe_feed = t('Atom feed');
+	} else {
 		$subscribe_feed = false;
+	}
 
-	if (remote_user() || (get_my_url() && $profile['unkmail'] && ($profile['uid'] != local_user()))) {
+	if (remote_user() || (get_my_url() && x($profile, 'unkmail') && ($profile['uid'] != local_user()))) {
 		$wallmessage = t('Message');
-		$wallmessage_link = "wallmessage/".$profile["nickname"];
+		$wallmessage_link = 'wallmessage/' . $profile['nickname'];
 
 		if (remote_user()) {
 			$r = q(
@@ -307,9 +315,9 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 			);
 		}
 		if ($r) {
-			$remote_url = $r[0]["url"];
-			$message_path = preg_replace("=(.*)/profile/(.*)=ism", "$1/message/new/", $remote_url);
-			$wallmessage_link = $message_path.base64_encode($profile["addr"]);
+			$remote_url = $r[0]['url'];
+			$message_path = preg_replace('=(.*)/profile/(.*)=ism', '$1/message/new/', $remote_url);
+			$wallmessage_link = $message_path . base64_encode($profile['addr']);
 		}
 	} else {
 		$wallmessage = false;
@@ -318,7 +326,7 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 
 	// show edit profile to yourself
 	if (!$is_contact && $profile['uid'] == local_user() && Feature::isEnabled(local_user(), 'multi_profiles')) {
-		$profile['edit'] = array(System::baseUrl(). '/profiles', t('Profiles'),"", t('Manage/edit profiles'));
+		$profile['edit'] = array(System::baseUrl() . '/profiles', t('Profiles'), '', t('Manage/edit profiles'));
 		$r = q(
 			"SELECT * FROM `profile` WHERE `uid` = %d",
 			local_user()
@@ -338,14 +346,14 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 					'alt' => t('Profile Image'),
 					'profile_name' => $rr['profile-name'],
 					'isdefault' => $rr['is-default'],
-					'visibile_to_everybody' =>  t('visible to everybody'),
+					'visibile_to_everybody' => t('visible to everybody'),
 					'edit_visibility' => t('Edit visibility'),
 				);
 			}
 		}
 	}
 	if (!$is_contact && $profile['uid'] == local_user() && !Feature::isEnabled(local_user(), 'multi_profiles')) {
-		$profile['edit'] = array(System::baseUrl(). '/profiles/'.$profile['id'], t('Edit profile'),"", t('Edit profile'));
+		$profile['edit'] = array(System::baseUrl() . '/profiles/' . $profile['id'], t('Edit profile'), '', t('Edit profile'));
 		$profile['menu'] = array(
 			'chg_photo' => t('Change profile photo'),
 			'cr_new' => null,
@@ -356,28 +364,23 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 	// Fetch the account type
 	$account_type = Contact::getAccountType($profile);
 
-	if ((x($profile, 'address') == 1)
-		|| (x($profile, 'location') == 1)
-		|| (x($profile, 'locality') == 1)
-		|| (x($profile, 'region') == 1)
-		|| (x($profile, 'postal-code') == 1)
-		|| (x($profile, 'country-name') == 1)
+	if (x($profile, 'address')
+		|| x($profile, 'location')
+		|| x($profile, 'locality')
+		|| x($profile, 'region')
+		|| x($profile, 'postal-code')
+		|| x($profile, 'country-name')
 	) {
 		$location = t('Location:');
 	}
 
-	$gender = ((x($profile, 'gender') == 1) ? t('Gender:') : false);
+	$gender   = x($profile, 'gender')   ? t('Gender:')   : false;
+	$marital  = x($profile, 'marital')  ? t('Status:')   : false;
+	$homepage = x($profile, 'homepage') ? t('Homepage:') : false;
+	$about    = x($profile, 'about')    ? t('About:')    : false;
+	$xmpp     = x($profile, 'xmpp')     ? t('XMPP:')     : false;
 
-
-	$marital = ((x($profile, 'marital') == 1) ?  t('Status:') : false);
-
-	$homepage = ((x($profile, 'homepage') == 1) ?  t('Homepage:') : false);
-
-	$about = ((x($profile, 'about') == 1) ?  t('About:') : false);
-
-	$xmpp = ((x($profile, 'xmpp') == 1) ?  t('XMPP:') : false);
-
-	if (($profile['hidewall'] || $block) && (! local_user()) && (! remote_user())) {
+	if ((x($profile, 'hidewall') || $block) && !local_user() && !remote_user()) {
 		$location = $pdesc = $gender = $marital = $homepage = $about = false;
 	}
 
@@ -385,7 +388,7 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 	$firstname = $split_name['first'];
 	$lastname = $split_name['last'];
 
-	if ($profile['guid'] != "") {
+	if (x($profile, 'guid')) {
 		$diaspora = array(
 			'guid' => $profile['guid'],
 			'podloc' => System::baseUrl(),
@@ -402,6 +405,9 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 		$diaspora = false;
 	}
 
+	$contact_block = '';
+	$updated = '';
+	$contacts = 0;
 	if (!$block) {
 		$contact_block = contact_block();
 
@@ -411,7 +417,7 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 				intval($a->profile['uid'])
 			);
 			if (DBM::is_result($r)) {
-				$updated =  date("c", strtotime($r[0]['updated']));
+				$updated = date('c', strtotime($r[0]['updated']));
 			}
 
 			$r = q(
@@ -437,45 +443,41 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 		$p[$k] = $v;
 	}
 
-	if (isset($p["about"])) {
-		$p["about"] = bbcode($p["about"]);
+	if (isset($p['about'])) {
+		$p['about'] = bbcode($p['about']);
 	}
 
-	if (isset($p["address"])) {
-		$p["address"] = bbcode($p["address"]);
+	if (isset($p['address'])) {
+		$p['address'] = bbcode($p['address']);
 	} else {
-		$p["address"] = bbcode($p["location"]);
+		$p['address'] = bbcode($p['location']);
 	}
 
-	if (isset($p["photo"])) {
-		$p["photo"] = proxy_url($p["photo"], false, PROXY_SIZE_SMALL);
+	if (isset($p['photo'])) {
+		$p['photo'] = proxy_url($p['photo'], false, PROXY_SIZE_SMALL);
 	}
 
 	$tpl = get_markup_template('profile_vcard.tpl');
-	$o .= replace_macros(
-		$tpl,
-		array(
+	$o .= replace_macros($tpl, array(
 		'$profile' => $p,
 		'$xmpp' => $xmpp,
-		'$connect'  => $connect,
-		'$remoteconnect'  => $remoteconnect,
+		'$connect' => $connect,
+		'$remoteconnect' => $remoteconnect,
 		'$subscribe_feed' => $subscribe_feed,
 		'$wallmessage' => $wallmessage,
 		'$wallmessage_link' => $wallmessage_link,
 		'$account_type' => $account_type,
 		'$location' => $location,
-		'$gender'   => $gender,
-		// '$pdesc'	=> $pdesc,
-		'$marital'  => $marital,
+		'$gender' => $gender,
+		'$marital' => $marital,
 		'$homepage' => $homepage,
 		'$about' => $about,
-		'$network' =>  t('Network:'),
+		'$network' => t('Network:'),
 		'$contacts' => $contacts,
 		'$updated' => $updated,
 		'$diaspora' => $diaspora,
 		'$contact_block' => $contact_block,
-		)
-	);
+	));
 
 	$arr = array('profile' => &$profile, 'entry' => &$o);
 
@@ -484,27 +486,26 @@ function profile_sidebar($profile, $block = 0, $show_connect = true)
 	return $o;
 }
 
-
 function get_birthdays()
 {
 	$a = get_app();
 	$o = '';
 
-	if (! local_user() || $a->is_mobile || $a->is_tablet) {
+	if (!local_user() || $a->is_mobile || $a->is_tablet) {
 		return $o;
 	}
 
 	/*
 	 * $mobile_detect = new Mobile_Detect();
 	 * $is_mobile = $mobile_detect->isMobile() || $mobile_detect->isTablet();
-	 *		if ($is_mobile)
-	 *			return $o;
+	 * 		if ($is_mobile)
+	 * 			return $o;
 	 */
 
 	$bd_format = t('g A l F d'); // 8 AM Friday January 18
 	$bd_short = t('F d');
 
-	$cachekey = "get_birthdays:".local_user();
+	$cachekey = 'get_birthdays:' . local_user();
 	$r = Cache::get($cachekey);
 	if (is_null($r)) {
 		$s = dba::p(
@@ -538,7 +539,7 @@ function get_birthdays()
 		$classtoday = $istoday ? ' birthday-today ' : '';
 		if ($total) {
 			foreach ($r as &$rr) {
-				if (! strlen($rr['name'])) {
+				if (!strlen($rr['name'])) {
 					continue;
 				}
 
@@ -553,54 +554,50 @@ function get_birthdays()
 				$sparkle = '';
 				$url = $rr['url'];
 				if ($rr['network'] === NETWORK_DFRN) {
-					$sparkle = " sparkle";
-					$url = System::baseUrl() . '/redir/'  . $rr['cid'];
+					$sparkle = ' sparkle';
+					$url = System::baseUrl() . '/redir/' . $rr['cid'];
 				}
 
 				$rr['link'] = $url;
 				$rr['title'] = $rr['name'];
-				$rr['date'] = day_translate(datetime_convert('UTC', $a->timezone, $rr['start'], $rr['adjust'] ? $bd_format : $bd_short)) . (($today) ?  ' ' . t('[today]') : '');
+				$rr['date'] = day_translate(datetime_convert('UTC', $a->timezone, $rr['start'], $rr['adjust'] ? $bd_format : $bd_short)) . (($today) ? ' ' . t('[today]') : '');
 				$rr['startime'] = null;
 				$rr['today'] = $today;
 			}
 		}
 	}
-	$tpl = get_markup_template("birthdays_reminder.tpl");
-	return replace_macros(
-		$tpl,
-		array(
+	$tpl = get_markup_template('birthdays_reminder.tpl');
+	return replace_macros($tpl, array(
 		'$baseurl' => System::baseUrl(),
 		'$classtoday' => $classtoday,
 		'$count' => $total,
 		'$event_reminders' => t('Birthday Reminders'),
 		'$event_title' => t('Birthdays this week:'),
 		'$events' => $r,
-		'$lbr' => '{',  // raw brackets mess up if/endif macro processing
+		'$lbr' => '{', // raw brackets mess up if/endif macro processing
 		'$rbr' => '}'
-		)
-	);
+	));
 }
 
-
 function get_events()
 {
 	require_once 'include/bbcode.php';
 
 	$a = get_app();
 
-	if (! local_user() || $a->is_mobile || $a->is_tablet) {
+	if (!local_user() || $a->is_mobile || $a->is_tablet) {
 		return $o;
 	}
 
 	/*
-	 *	$mobile_detect = new Mobile_Detect();
-	 *		$is_mobile = $mobile_detect->isMobile() || $mobile_detect->isTablet();
-	 *		if ($is_mobile)
-	 *			return $o;
+	 * 	$mobile_detect = new Mobile_Detect();
+	 * 		$is_mobile = $mobile_detect->isMobile() || $mobile_detect->isTablet();
+	 * 		if ($is_mobile)
+	 * 			return $o;
 	 */
 
 	$bd_format = t('g A l F d'); // 8 AM Friday January 18
-	$bd_short = t('F d');
+	$classtoday = '';
 
 	$s = dba::p(
 		"SELECT `event`.* FROM `event`
@@ -614,7 +611,6 @@ function get_events()
 	$r = array();
 
 	if (DBM::is_result($s)) {
-		$now = strtotime('now');
 		$istoday = false;
 
 		while ($rr = dba::fetch($s)) {
@@ -634,7 +630,7 @@ function get_events()
 			}
 
 			$description = substr(strip_tags(bbcode($rr['desc'])), 0, 32) . '... ';
-			if (! $description) {
+			if (!$description) {
 				$description = t('[No description]');
 			}
 
@@ -647,8 +643,8 @@ function get_events()
 			$today = ((substr($strt, 0, 10) === datetime_convert('UTC', $a->timezone, 'now', 'Y-m-d')) ? true : false);
 
 			$rr['title'] = $title;
-			$rr['description'] = $desciption;
-			$rr['date'] = day_translate(datetime_convert('UTC', $rr['adjust'] ? $a->timezone : 'UTC', $rr['start'], $bd_format)) . (($today) ?  ' ' . t('[today]') : '');
+			$rr['description'] = $description;
+			$rr['date'] = day_translate(datetime_convert('UTC', $rr['adjust'] ? $a->timezone : 'UTC', $rr['start'], $bd_format)) . (($today) ? ' ' . t('[today]') : '');
 			$rr['startime'] = $strt;
 			$rr['today'] = $today;
 
@@ -657,18 +653,15 @@ function get_events()
 		dba::close($s);
 		$classtoday = (($istoday) ? 'event-today' : '');
 	}
-	$tpl = get_markup_template("events_reminder.tpl");
-	return replace_macros(
-		$tpl,
-		array(
+	$tpl = get_markup_template('events_reminder.tpl');
+	return replace_macros($tpl, array(
 		'$baseurl' => System::baseUrl(),
 		'$classtoday' => $classtoday,
 		'$count' => count($r),
 		'$event_reminders' => t('Event Reminders'),
 		'$event_title' => t('Events this week:'),
 		'$events' => $r,
-		)
-	);
+	));
 }
 
 function advanced_profile(App $a)
@@ -677,9 +670,8 @@ function advanced_profile(App $a)
 	$uid = $a->profile['uid'];
 
 	$o .= replace_macros(
-		get_markup_template('section_title.tpl'),
-		array(
-		'$title' => t('Profile')
+		get_markup_template('section_title.tpl'), array(
+			'$title' => t('Profile')
 		)
 	);
 
@@ -688,32 +680,32 @@ function advanced_profile(App $a)
 
 		$profile = array();
 
-		$profile['fullname'] = array( t('Full Name:'), $a->profile['name'] ) ;
+		$profile['fullname'] = array(t('Full Name:'), $a->profile['name']);
 
 		if ($a->profile['gender']) {
-			$profile['gender'] = array( t('Gender:'),  $a->profile['gender'] );
+			$profile['gender'] = array(t('Gender:'), $a->profile['gender']);
 		}
 
 		if (($a->profile['dob']) && ($a->profile['dob'] > '0001-01-01')) {
 			$year_bd_format = t('j F, Y');
 			$short_bd_format = t('j F');
 
+			$val = intval($a->profile['dob']) ?
+				day_translate(datetime_convert('UTC', 'UTC', $a->profile['dob'] . ' 00:00 +00:00', $year_bd_format))
+				: day_translate(datetime_convert('UTC', 'UTC', '2001-' . substr($a->profile['dob'], 5) . ' 00:00 +00:00', $short_bd_format));
 
-			$val = ((intval($a->profile['dob']))
-				? day_translate(datetime_convert('UTC', 'UTC', $a->profile['dob'] . ' 00:00 +00:00', $year_bd_format))
-				: day_translate(datetime_convert('UTC', 'UTC', '2001-' . substr($a->profile['dob'], 5) . ' 00:00 +00:00', $short_bd_format)));
-
-			$profile['birthday'] = array( t('Birthday:'), $val);
+			$profile['birthday'] = array(t('Birthday:'), $val);
 		}
+
 		if (!empty($a->profile['dob'])
 			&& $a->profile['dob'] > '0001-01-01'
 			&& $age = age($a->profile['dob'], $a->profile['timezone'], '')
 		) {
-			$profile['age'] = array( t('Age:'), $age );
+			$profile['age'] = array(t('Age:'), $age);
 		}
 
 		if ($a->profile['marital']) {
-			$profile['marital'] = array( t('Status:'), $a->profile['marital']);
+			$profile['marital'] = array(t('Status:'), $a->profile['marital']);
 		}
 
 		/// @TODO Maybe use x() here, plus below?
@@ -726,95 +718,92 @@ function advanced_profile(App $a)
 		}
 
 		if ($a->profile['sexual']) {
-			$profile['sexual'] = array( t('Sexual Preference:'), $a->profile['sexual'] );
+			$profile['sexual'] = array(t('Sexual Preference:'), $a->profile['sexual']);
 		}
 
 		if ($a->profile['homepage']) {
-			$profile['homepage'] = array( t('Homepage:'), linkify($a->profile['homepage']) );
+			$profile['homepage'] = array(t('Homepage:'), linkify($a->profile['homepage']));
 		}
 
 		if ($a->profile['hometown']) {
-			$profile['hometown'] = array( t('Hometown:'), linkify($a->profile['hometown']) );
+			$profile['hometown'] = array(t('Hometown:'), linkify($a->profile['hometown']));
 		}
 
 		if ($a->profile['pub_keywords']) {
-			$profile['pub_keywords'] = array( t('Tags:'), $a->profile['pub_keywords']);
+			$profile['pub_keywords'] = array(t('Tags:'), $a->profile['pub_keywords']);
 		}
 
 		if ($a->profile['politic']) {
-			$profile['politic'] = array( t('Political Views:'), $a->profile['politic']);
+			$profile['politic'] = array(t('Political Views:'), $a->profile['politic']);
 		}
 
 		if ($a->profile['religion']) {
-			$profile['religion'] = array( t('Religion:'), $a->profile['religion']);
+			$profile['religion'] = array(t('Religion:'), $a->profile['religion']);
 		}
 
 		if ($txt = prepare_text($a->profile['about'])) {
-			$profile['about'] = array( t('About:'), $txt );
+			$profile['about'] = array(t('About:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['interest'])) {
-			$profile['interest'] = array( t('Hobbies/Interests:'), $txt);
+			$profile['interest'] = array(t('Hobbies/Interests:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['likes'])) {
-			$profile['likes'] = array( t('Likes:'), $txt);
+			$profile['likes'] = array(t('Likes:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['dislikes'])) {
-			$profile['dislikes'] = array( t('Dislikes:'), $txt);
+			$profile['dislikes'] = array(t('Dislikes:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['contact'])) {
-			$profile['contact'] = array( t('Contact information and Social Networks:'), $txt);
+			$profile['contact'] = array(t('Contact information and Social Networks:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['music'])) {
-			$profile['music'] = array( t('Musical interests:'), $txt);
+			$profile['music'] = array(t('Musical interests:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['book'])) {
-			$profile['book'] = array( t('Books, literature:'), $txt);
+			$profile['book'] = array(t('Books, literature:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['tv'])) {
-			$profile['tv'] = array( t('Television:'), $txt);
+			$profile['tv'] = array(t('Television:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['film'])) {
-			$profile['film'] = array( t('Film/dance/culture/entertainment:'), $txt);
+			$profile['film'] = array(t('Film/dance/culture/entertainment:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['romance'])) {
-			$profile['romance'] = array( t('Love/Romance:'), $txt);
+			$profile['romance'] = array(t('Love/Romance:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['work'])) {
-			$profile['work'] = array( t('Work/employment:'), $txt);
+			$profile['work'] = array(t('Work/employment:'), $txt);
 		}
 
 		if ($txt = prepare_text($a->profile['education'])) {
-			$profile['education'] = array( t('School/education:'), $txt );
+			$profile['education'] = array(t('School/education:'), $txt);
 		}
 
 		//show subcribed forum if it is enabled in the usersettings
 		if (Feature::isEnabled($uid, 'forumlist_profile')) {
-			$profile['forumlist'] = array( t('Forums:'), ForumManager::profileAdvanced($uid));
+			$profile['forumlist'] = array(t('Forums:'), ForumManager::profileAdvanced($uid));
 		}
 
 		if ($a->profile['uid'] == local_user()) {
-			$profile['edit'] = array(System::baseUrl(). '/profiles/'.$a->profile['id'], t('Edit profile'),"", t('Edit profile'));
+			$profile['edit'] = array(System::baseUrl() . '/profiles/' . $a->profile['id'], t('Edit profile'), '', t('Edit profile'));
 		}
 
-		return replace_macros(
-			$tpl,
-			array(
+		return replace_macros($tpl, array(
 			'$title' => t('Profile'),
 			'$basic' => t('Basic'),
 			'$advanced' => t('Advanced'),
 			'$profile' => $profile
-			)
-		);
+		));
 	}
 
 	return '';
@@ -822,12 +811,11 @@ function advanced_profile(App $a)
 
 function profile_tabs($a, $is_owner = false, $nickname = null)
 {
-	//echo "<pre>"; var_dump($a->user); killme();
-
 	if (is_null($nickname)) {
-		$nickname  = $a->user['nickname'];
+		$nickname = $a->user['nickname'];
 	}
 
+	$tab = false;
 	if (x($_GET, 'tab')) {
 		$tab = notags(trim($_GET['tab']));
 	}
@@ -836,85 +824,85 @@ function profile_tabs($a, $is_owner = false, $nickname = null)
 
 	$tabs = array(
 		array(
-			'label'=>t('Status'),
-			'url' => $url,
-			'sel' => ((!isset($tab) && $a->argv[0]=='profile') ? 'active' : ''),
+			'label' => t('Status'),
+			'url'   => $url,
+			'sel'   => !$tab && $a->argv[0] == 'profile' ? 'active' : '',
 			'title' => t('Status Messages and Posts'),
-			'id' => 'status-tab',
+			'id'    => 'status-tab',
 			'accesskey' => 'm',
 		),
 		array(
 			'label' => t('Profile'),
-			'url' 	=> $url.'/?tab=profile',
-			'sel'	=> ((isset($tab) && $tab=='profile') ? 'active' : ''),
+			'url'   => $url . '/?tab=profile',
+			'sel'   => $tab == 'profile' ? 'active' : '',
 			'title' => t('Profile Details'),
-			'id' => 'profile-tab',
+			'id'    => 'profile-tab',
 			'accesskey' => 'r',
 		),
 		array(
 			'label' => t('Photos'),
-			'url'	=> System::baseUrl() . '/photos/' . $nickname,
-			'sel'	=> ((!isset($tab) && $a->argv[0]=='photos') ? 'active' : ''),
+			'url'   => System::baseUrl() . '/photos/' . $nickname,
+			'sel'   => !$tab && $a->argv[0] == 'photos' ? 'active' : '',
 			'title' => t('Photo Albums'),
-			'id' => 'photo-tab',
+			'id'    => 'photo-tab',
 			'accesskey' => 'h',
 		),
 		array(
 			'label' => t('Videos'),
-			'url'	=> System::baseUrl() . '/videos/' . $nickname,
-			'sel'	=> ((!isset($tab) && $a->argv[0]=='videos') ? 'active' : ''),
+			'url'   => System::baseUrl() . '/videos/' . $nickname,
+			'sel'   => !$tab && $a->argv[0] == 'videos' ? 'active' : '',
 			'title' => t('Videos'),
-			'id' => 'video-tab',
+			'id'    => 'video-tab',
 			'accesskey' => 'v',
 		),
 	);
 
 	// the calendar link for the full featured events calendar
 	if ($is_owner && $a->theme_events_in_profile) {
-			$tabs[] = array(
-				'label' => t('Events'),
-				'url'	=> System::baseUrl() . '/events',
-				'sel' 	=>((!isset($tab) && $a->argv[0]=='events') ? 'active' : ''),
-				'title' => t('Events and Calendar'),
-				'id' => 'events-tab',
-				'accesskey' => 'e',
-			);
+		$tabs[] = array(
+			'label' => t('Events'),
+			'url'   => System::baseUrl() . '/events',
+			'sel'   => !$tab && $a->argv[0] == 'events' ? 'active' : '',
+			'title' => t('Events and Calendar'),
+			'id'    => 'events-tab',
+			'accesskey' => 'e',
+		);
 		// if the user is not the owner of the calendar we only show a calendar
 		// with the public events of the calendar owner
-	} elseif (! $is_owner) {
+	} elseif (!$is_owner) {
 		$tabs[] = array(
-				'label' => t('Events'),
-				'url'	=> System::baseUrl() . '/cal/' . $nickname,
-				'sel' 	=>((!isset($tab) && $a->argv[0]=='cal') ? 'active' : ''),
-				'title' => t('Events and Calendar'),
-				'id' => 'events-tab',
-				'accesskey' => 'e',
-			);
+			'label' => t('Events'),
+			'url'   => System::baseUrl() . '/cal/' . $nickname,
+			'sel'   => !$tab && $a->argv[0] == 'cal' ? 'active' : '',
+			'title' => t('Events and Calendar'),
+			'id'    => 'events-tab',
+			'accesskey' => 'e',
+		);
 	}
 
 	if ($is_owner) {
 		$tabs[] = array(
 			'label' => t('Personal Notes'),
-			'url'	=> System::baseUrl() . '/notes',
-			'sel' 	=>((!isset($tab) && $a->argv[0]=='notes') ? 'active' : ''),
+			'url'   => System::baseUrl() . '/notes',
+			'sel'   => !$tab && $a->argv[0] == 'notes' ? 'active' : '',
 			'title' => t('Only You Can See This'),
-			'id' => 'notes-tab',
+			'id'    => 'notes-tab',
 			'accesskey' => 't',
 		);
 	}
 
-	if ((! $is_owner) && ((count($a->profile)) || (! $a->profile['hide-friends']))) {
+	if ((!$is_owner) && ((count($a->profile)) || (!$a->profile['hide-friends']))) {
 		$tabs[] = array(
 			'label' => t('Contacts'),
-			'url'	=> System::baseUrl() . '/viewcontacts/' . $nickname,
-			'sel'	=> ((!isset($tab) && $a->argv[0]=='viewcontacts') ? 'active' : ''),
+			'url'   => System::baseUrl() . '/viewcontacts/' . $nickname,
+			'sel'   => !$tab && $a->argv[0] == 'viewcontacts' ? 'active' : '',
 			'title' => t('Contacts'),
-			'id' => 'viewcontacts-tab',
+			'id'    => 'viewcontacts-tab',
 			'accesskey' => 'k',
 		);
 	}
 
-	$arr = array('is_owner' => $is_owner, 'nickname' => $nickname, 'tab' => (($tab) ? $tab : false), 'tabs' => $tabs);
+	$arr = array('is_owner' => $is_owner, 'nickname' => $nickname, 'tab' => $tab, 'tabs' => $tabs);
 	call_hooks('profile_tabs', $arr);
 
 	$tpl = get_markup_template('common_tabs.tpl');
@@ -939,9 +927,9 @@ function zrl_init(App $a)
 		// The check fetches the cached value from gprobe to reduce the load for this system
 		$urlparts = parse_url($my_url);
 
-		$result = Cache::get("gprobe:" . $urlparts["host"]);
-		if ((!is_null($result)) && (in_array($result["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
-			logger("DDoS attempt detected for " . $urlparts["host"] . " by " . $_SERVER["REMOTE_ADDR"] . ". server data: " . print_r($_SERVER, true), LOGGER_DEBUG);
+		$result = Cache::get('gprobe:' . $urlparts['host']);
+		if ((!is_null($result)) && (in_array($result['network'], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
+			logger('DDoS attempt detected for ' . $urlparts['host'] . ' by ' . $_SERVER['REMOTE_ADDR'] . '. server data: ' . print_r($_SERVER, true), LOGGER_DEBUG);
 			return;
 		}
 
@@ -953,10 +941,10 @@ function zrl_init(App $a)
 
 function zrl($s, $force = false)
 {
-	if (! strlen($s)) {
+	if (!strlen($s)) {
 		return $s;
 	}
-	if ((! strpos($s, '/profile/')) && (! $force)) {
+	if ((!strpos($s, '/profile/')) && (!$force)) {
 		return $s;
 	}
 	if ($force && substr($s, -1, 1) !== '/') {
@@ -964,7 +952,7 @@ function zrl($s, $force = false)
 	}
 	$achar = strpos($s, '?') ? '&' : '?';
 	$mine = get_my_url();
-	if ($mine && ! link_compare($mine, $s)) {
+	if ($mine && !link_compare($mine, $s)) {
 		return $s . $achar . 'zrl=' . urlencode($mine);
 	}
 	return $s;
@@ -987,7 +975,7 @@ function zrl($s, $force = false)
 function get_theme_uid()
 {
 	$uid = ((!empty($_REQUEST['puid'])) ? intval($_REQUEST['puid']) : 0);
-	if ((local_user()) && ((PConfig::get(local_user(), 'system', 'always_my_theme')) || (! $uid))) {
+	if ((local_user()) && ((PConfig::get(local_user(), 'system', 'always_my_theme')) || (!$uid))) {
 		return local_user();
 	}
 
diff --git a/include/items.php b/include/items.php
index 275052c1f..8f15f9479 100644
--- a/include/items.php
+++ b/include/items.php
@@ -20,8 +20,6 @@ use Friendica\Protocol\OStatus;
 use Friendica\Protocol\Feed;
 
 require_once 'include/bbcode.php';
-require_once 'include/oembed.php';
-require_once 'include/crypto.php';
 require_once 'include/tags.php';
 require_once 'include/files.php';
 require_once 'include/text.php';
@@ -423,7 +421,7 @@ function uri_to_guid($uri, $host = "") {
  * @return array Item array with removed conversation data
  */
 function store_conversation($arr) {
-	if (in_array($arr['network'], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)) && !empty($arr['uri'])) {
+	if (in_array(defaults($arr, 'network', NETWORK_PHANTOM), array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)) && !empty($arr['uri'])) {
 		$conversation = array('item-uri' => $arr['uri'], 'received' => DBM::date());
 
 		if (isset($arr['parent-uri']) && ($arr['parent-uri'] != $arr['uri'])) {
@@ -481,8 +479,8 @@ function store_conversation($arr) {
 }
 
 /// @TODO add type-hint array
-function item_store($arr, $force_parent = false, $notify = false, $dontcache = false) {
-
+function item_store($arr, $force_parent = false, $notify = false, $dontcache = false)
+{
 	$a = get_app();
 
 	// If it is a posting where users should get notifications, then define it as wall posting
@@ -504,6 +502,8 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 				$arr['guid'] = uri_to_guid($arr['uri'], $a->get_hostname());
 			}
 		}
+	} else {
+		$arr['network'] = trim(defaults($arr, 'network', NETWORK_PHANTOM));
 	}
 
 	if ($notify) {
@@ -583,7 +583,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 	 * We have to check several networks since Friendica posts could be repeated
 	 * via OStatus (maybe Diasporsa as well)
 	 */
-	if (in_array(trim($arr['network']), array(NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""))) {
+	if (in_array($arr['network'], array(NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""))) {
 		$r = q("SELECT `id`, `network` FROM `item` WHERE `uri` = '%s' AND `uid` = %d AND `network` IN ('%s', '%s', '%s')  LIMIT 1",
 				dbesc(trim($arr['uri'])),
 				intval($uid),
@@ -646,7 +646,6 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 	$arr['attach']        = ((x($arr, 'attach'))        ? notags(trim($arr['attach']))        : '');
 	$arr['app']           = ((x($arr, 'app'))           ? notags(trim($arr['app']))           : '');
 	$arr['origin']        = ((x($arr, 'origin'))        ? intval($arr['origin'])              : 0 );
-	$arr['network']       = ((x($arr, 'network'))       ? trim($arr['network'])               : '');
 	$arr['postopts']      = ((x($arr, 'postopts'))      ? trim($arr['postopts'])              : '');
 	$arr['resource-id']   = ((x($arr, 'resource-id'))   ? trim($arr['resource-id'])           : '');
 	$arr['event-id']      = ((x($arr, 'event-id'))      ? intval($arr['event-id'])            : 0 );
@@ -676,18 +675,19 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 		$arr['plink'] = System::baseUrl() . '/display/' . urlencode($arr['guid']);
 	}
 
-	if ($arr['network'] == "") {
+	if ($arr['network'] == NETWORK_PHANTOM) {
 		$r = q("SELECT `network` FROM `contact` WHERE `network` IN ('%s', '%s', '%s') AND `nurl` = '%s' AND `uid` = %d LIMIT 1",
 			dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA), dbesc(NETWORK_OSTATUS),
 			dbesc(normalise_link($arr['author-link'])),
 			intval($arr['uid'])
 		);
 
-		if (!DBM::is_result($r))
+		if (!DBM::is_result($r)) {
 			$r = q("SELECT `network` FROM `gcontact` WHERE `network` IN ('%s', '%s', '%s') AND `nurl` = '%s' LIMIT 1",
 				dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA), dbesc(NETWORK_OSTATUS),
 				dbesc(normalise_link($arr['author-link']))
 			);
+		}
 
 		if (!DBM::is_result($r)) {
 			$r = q("SELECT `network` FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
@@ -735,7 +735,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 		logger("Contact-id was missing for post ".$arr["guid"]." from user id ".$uid." - now set to ".$arr["contact-id"], LOGGER_DEBUG);
 	}
 
-	if ($arr["gcontact-id"] == 0) {
+	if (!x($arr, "gcontact-id")) {
 		/*
 		 * The gcontact should mostly behave like the contact. But is is supposed to be global for the system.
 		 * This means that wall posts, repeated posts, etc. should have the gcontact id of the owner.
diff --git a/include/oembed.php b/include/oembed.php
deleted file mode 100644
index b7c1616fe..000000000
--- a/include/oembed.php
+++ /dev/null
@@ -1,317 +0,0 @@
-<?php
-
-/**
- * @file include/oembed.php
- */
-
-use Friendica\App;
-use Friendica\Core\Cache;
-use Friendica\Core\System;
-use Friendica\ParseUrl;
-use Friendica\Core\Config;
-use Friendica\Database\DBM;
-
-function oembed_replacecb($matches){
-	$embedurl=$matches[1];
-	$j = oembed_fetch_url($embedurl);
-	$s =  oembed_format_object($j);
-
-	return $s;
-}
-
-/**
- * @brief Get data from an URL to embed its content.
- *
- * @param string $embedurl The URL from which the data should be fetched.
- * @param bool $no_rich_type If set to true rich type content won't be fetched.
- *
- * @return bool|object Returns object with embed content or false if no embedable
- *	 content exists
- */
-function oembed_fetch_url($embedurl, $no_rich_type = false) {
-	$embedurl = trim($embedurl, "'");
-	$embedurl = trim($embedurl, '"');
-
-	$a = get_app();
-
-	$condition = array('url' => normalise_link($embedurl));
-	$r = dba::select('oembed', array('content'), $condition, array('limit' => 1));
-
-	if (DBM::is_result($r)) {
-		$txt = $r["content"];
-	} else {
-		$txt = Cache::get($a->videowidth . $embedurl);
-	}
-	// These media files should now be caught in bbcode.php
-	// left here as a fallback in case this is called from another source
-
-	$noexts = array("mp3", "mp4", "ogg", "ogv", "oga", "ogm", "webm");
-	$ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION);
-
-
-	if (is_null($txt)) {
-		$txt = "";
-
-		if (!in_array($ext, $noexts)){
-			// try oembed autodiscovery
-			$redirects = 0;
-			$html_text = fetch_url($embedurl, false, $redirects, 15, "text/*");
-			if ($html_text) {
-				$dom = @DOMDocument::loadHTML($html_text);
-				if ($dom) {
-					$xpath = new DOMXPath($dom);
-					$attr = "oembed";
-					$xattr = oe_build_xpath("class","oembed");
-					$entries = $xpath->query("//link[@type='application/json+oembed']");
-					foreach ($entries as $e) {
-						$href = $e->getAttributeNode("href")->nodeValue;
-						$txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
-						break;
-					}
-					$entries = $xpath->query("//link[@type='text/json+oembed']");
-					foreach ($entries as $e) {
-						$href = $e->getAttributeNode("href")->nodeValue;
-						$txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
-						break;
-					}
-				}
-			}
-		}
-
-		$txt = trim($txt);
-
-		if ($txt[0] != "{") {
-			$txt = '{"type":"error"}';
-		} else {	//save in cache
-			$j = json_decode($txt);
-			if ($j->type != "error") {
-				dba::insert('oembed', array('url' => normalise_link($embedurl),
-							'content' => $txt, 'created' => datetime_convert()), true);
-			}
-
-			Cache::set($a->videowidth.$embedurl, $txt, CACHE_DAY);
-		}
-	}
-
-	$j = json_decode($txt);
-
-	if (!is_object($j)) {
-		return false;
-	}
-
-	// Always embed the SSL version
-	if (isset($j->html)) {
-		$j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
-			array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
-	}
-
-	$j->embedurl = $embedurl;
-
-	// If fetching information doesn't work, then improve via internal functions
-	if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) {
-		$data = ParseUrl::getSiteinfoCached($embedurl, true, false);
-		$j->type = $data["type"];
-
-		if ($j->type == "photo") {
-			$j->url = $data["url"];
-			//$j->width = $data["images"][0]["width"];
-			//$j->height = $data["images"][0]["height"];
-		}
-
-		if (isset($data["title"])) {
-			$j->title = $data["title"];
-		}
-
-		if (isset($data["text"])) {
-			$j->description = $data["text"];
-		}
-
-		if (is_array($data["images"])) {
-			$j->thumbnail_url = $data["images"][0]["src"];
-			$j->thumbnail_width = $data["images"][0]["width"];
-			$j->thumbnail_height = $data["images"][0]["height"];
-		}
-	}
-
-	call_hooks('oembed_fetch_url', $embedurl, $j);
-
-	return $j;
-}
-
-function oembed_format_object($j){
-	require_once("mod/proxy.php");
-
-	$embedurl = $j->embedurl;
-	$jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
-	$ret="<span class='oembed ".$j->type."'>";
-	switch ($j->type) {
-		case "video":
-			if (isset($j->thumbnail_url)) {
-				$tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
-				$th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
-				// make sure we don't attempt divide by zero, fallback is a 1:1 ratio
-				$tr = (($th) ? $tw/$th : 1);
-
-				$th=120; $tw = $th*$tr;
-				$tpl=get_markup_template('oembed_video.tpl');
-				$ret.=replace_macros($tpl, array(
-					'$baseurl'     => System::baseUrl(),
-					'$embedurl'    => $embedurl,
-					'$escapedhtml' => base64_encode($jhtml),
-					'$tw'          => $tw,
-					'$th'          => $th,
-					'$turl'        => $j->thumbnail_url,
-				));
-
-			} else {
-				$ret=$jhtml;
-			}
-			//$ret.="<br>";
-			break;
-		case "photo":
-			$ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
-			break;
-		case "link":
-			break;
-		case "rich":
-			// not so safe..
-			if (!Config::get("system","no_oembed_rich_content")) {
-				$ret.= proxy_parse_html($jhtml);
-			}
-			break;
-	}
-
-	// add link to source if not present in "rich" type
-	if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
-		$ret .= "<h4>";
-		if (isset($j->title)) {
-			if (isset($j->provider_name)) {
-				$ret .= $j->provider_name.": ";
-			}
-
-			$embedlink = (isset($j->title))?$j->title:$embedurl;
-			$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
-			if (isset($j->author_name)) {
-				$ret.=" (".$j->author_name.")";
-			}
-		} elseif (isset($j->provider_name) || isset($j->author_name)) {
-			$embedlink = "";
-			if (isset($j->provider_name)) {
-				$embedlink .= $j->provider_name;
-			}
-
-			if (isset($j->author_name)) {
-				if ($embedlink != "") {
-					$embedlink .= ": ";
-				}
-
-				$embedlink .= $j->author_name;
-			}
-			if (trim($embedlink) == "") {
-				$embedlink = $embedurl;
-			}
-
-			$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
-		}
-		//if (isset($j->author_name)) $ret.=" by ".$j->author_name;
-		//if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
-		$ret .= "</h4>";
-	} else {
-		// add <a> for html2bbcode conversion
-		$ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
-	}
-	$ret.="</span>";
-	$ret = str_replace("\n","",$ret);
-	return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
-}
-
-/**
- * @brief Generates the iframe HTML for an oembed attachment.
- *
- * Width and height are given by the remote, and are regularly too small for
- * the generated iframe.
- *
- * The width is entirely discarded for the actual width of the post, while fixed
- * height is used as a starting point before the inevitable resizing.
- *
- * Since the iframe is automatically resized on load, there are no need for ugly
- * and impractical scrollbars.
- *
- * @param string $src Original remote URL to embed
- * @param string $width
- * @param string $height
- * @return string formatted HTML
- *
- * @see oembed_format_object()
- */
-function oembed_iframe($src, $width, $height) {
-	$a = get_app();
-
-	if (!$height || strstr($height,'%')) {
-		$height = '200';
-	}
-	$width = '100%';
-
-	$s = System::baseUrl() . '/oembed/' . base64url_encode($src);
-	return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
-}
-
-
-
-function oembed_bbcode2html($text){
-	$stopoembed = Config::get("system","no_oembed");
-	if ($stopoembed == true){
-		return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
-	}
-	return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
-}
-
-
-function oe_build_xpath($attr, $value){
-	// http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
-	return "contains( normalize-space( @$attr ), ' $value ' ) or substring( normalize-space( @$attr ), 1, string-length( '$value' ) + 1 ) = '$value ' or substring( normalize-space( @$attr ), string-length( @$attr ) - string-length( '$value' ) ) = ' $value' or @$attr = '$value'";
-}
-
-function oe_get_inner_html($node) {
-	$innerHTML= '';
-	$children = $node->childNodes;
-	foreach ($children as $child) {
-		$innerHTML .= $child->ownerDocument->saveXML($child);
-	}
-	return $innerHTML;
-}
-
-/**
- * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
- * and replace it with [embed]url[/embed]
- */
-function oembed_html2bbcode($text) {
-	// start parser only if 'oembed' is in text
-	if (strpos($text, "oembed")) {
-
-		// convert non ascii chars to html entities
-		$html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
-
-		// If it doesn't parse at all, just return the text.
-		$dom = @DOMDocument::loadHTML($html_text);
-		if (! $dom) {
-			return $text;
-		}
-		$xpath = new DOMXPath($dom);
-		$attr = "oembed";
-
-		$xattr = oe_build_xpath("class","oembed");
-		$entries = $xpath->query("//span[$xattr]");
-
-		$xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
-		foreach ($entries as $e) {
-			$href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
-			if (!is_null($href)) {
-				$e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
-			}
-		}
-		return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
-	} else {
-		return $text;
-	}
-}
diff --git a/include/tags.php b/include/tags.php
index 8d8fb7655..584ed30e5 100644
--- a/include/tags.php
+++ b/include/tags.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file include/tags.php
  */
@@ -8,11 +9,13 @@ use Friendica\Core\System;
 use Friendica\Database\DBM;
 use Friendica\Model\Contact;
 
-function create_tags_from_item($itemid) {
+function create_tags_from_item($itemid)
+{
 	$profile_base = System::baseUrl();
 	$profile_data = parse_url($profile_base);
-	$profile_base_friendica = $profile_data['host'].$profile_data['path']."/profile/";
-	$profile_base_diaspora = $profile_data['host'].$profile_data['path']."/u/";
+	$profile_path = defaults($profile_data, 'path', '');
+	$profile_base_friendica = $profile_data['host'] . $profile_path . '/profile/';
+	$profile_base_diaspora = $profile_data['host'] . $profile_path . '/u/';
 
 	$messages = q("SELECT `guid`, `uid`, `id`, `edited`, `deleted`, `created`, `received`, `title`, `body`, `tag`, `parent` FROM `item` WHERE `id` = %d LIMIT 1", intval($itemid));
 
@@ -28,48 +31,53 @@ function create_tags_from_item($itemid) {
 		intval(TERM_HASHTAG),
 		intval(TERM_MENTION));
 
-	if ($message["deleted"])
+	if ($message['deleted']) {
 		return;
+	}
 
-	$taglist = explode(",", $message["tag"]);
+	$taglist = explode(',', $message['tag']);
 
-	$tags = "";
-	foreach ($taglist as $tag)
-		if ((substr(trim($tag), 0, 1) == "#") || (substr(trim($tag), 0, 1) == "@"))
-			$tags .= " ".trim($tag);
-		else
-			$tags .= " #".trim($tag);
+	$tags = '';
+	foreach ($taglist as $tag) {
+		if ((substr(trim($tag), 0, 1) == '#') || (substr(trim($tag), 0, 1) == '@')) {
+			$tags .= ' ' . trim($tag);
+		} else {
+			$tags .= ' #' . trim($tag);
+		}
+	}
 
-	$data = " ".$message["title"]." ".$message["body"]." ".$tags." ";
+	$data = ' ' . $message['title'] . ' ' . $message['body'] . ' ' . $tags . ' ';
 
 	// ignore anything in a code block
-	$data = preg_replace('/\[code\](.*?)\[\/code\]/sm','',$data);
+	$data = preg_replace('/\[code\](.*?)\[\/code\]/sm', '', $data);
 
 	$tags = array();
 
-	$pattern = "/\W\#([^\[].*?)[\s'\".,:;\?!\[\]\/]/ism";
-	if (preg_match_all($pattern, $data, $matches))
-		foreach ($matches[1] as $match)
-			$tags["#".strtolower($match)] = "";
-
-	$pattern = "/\W([\#@])\[url\=(.*?)\](.*?)\[\/url\]/ism";
-	if (preg_match_all($pattern, $data, $matches, PREG_SET_ORDER)) {
-		foreach ($matches as $match)
-			$tags[$match[1].strtolower(trim($match[3], ',.:;[]/\"?!'))] = $match[2];
+	$pattern = '/\W\#([^\[].*?)[\s\'".,:;\?!\[\]\/]/ism';
+	if (preg_match_all($pattern, $data, $matches)) {
+		foreach ($matches[1] as $match) {
+			$tags['#' . strtolower($match)] = '';
+		}
 	}
 
-	foreach ($tags as $tag=>$link) {
+	$pattern = '/\W([\#@])\[url\=(.*?)\](.*?)\[\/url\]/ism';
+	if (preg_match_all($pattern, $data, $matches, PREG_SET_ORDER)) {
+		foreach ($matches as $match) {
+			$tags[$match[1] . strtolower(trim($match[3], ',.:;[]/\"?!'))] = $match[2];
+		}
+	}
 
-		if (substr(trim($tag), 0, 1) == "#") {
+	foreach ($tags as $tag => $link) {
+		if (substr(trim($tag), 0, 1) == '#') {
 			// try to ignore #039 or #1 or anything like that
-			if (ctype_digit(substr(trim($tag),1)))
+			if (ctype_digit(substr(trim($tag), 1)))
 				continue;
 			// try to ignore html hex escapes, e.g. #x2317
-			if ((substr(trim($tag),1,1) == 'x' || substr(trim($tag),1,1) == 'X') && ctype_digit(substr(trim($tag),2)))
+			if ((substr(trim($tag), 1, 1) == 'x' || substr(trim($tag), 1, 1) == 'X') && ctype_digit(substr(trim($tag), 2)))
 				continue;
 			$type = TERM_HASHTAG;
 			$term = substr($tag, 1);
-		} elseif (substr(trim($tag), 0, 1) == "@") {
+		} elseif (substr(trim($tag), 0, 1) == '@') {
 			$type = TERM_MENTION;
 			$term = substr($tag, 1);
 		} else { // This shouldn't happen
@@ -77,78 +85,78 @@ function create_tags_from_item($itemid) {
 			$term = $tag;
 		}
 
-		if ($message["uid"] == 0) {
+		if ($message['uid'] == 0) {
 			$global = true;
 
 			q("UPDATE `term` SET `global` = 1 WHERE `otype` = %d AND `guid` = '%s'",
-				intval(TERM_OBJ_POST), dbesc($message["guid"]));
+				intval(TERM_OBJ_POST), dbesc($message['guid']));
 		} else {
 			$isglobal = q("SELECT `global` FROM `term` WHERE `uid` = 0 AND `otype` = %d AND `guid` = '%s'",
-				intval(TERM_OBJ_POST), dbesc($message["guid"]));
+				intval(TERM_OBJ_POST), dbesc($message['guid']));
 
 			$global = (count($isglobal) > 0);
 		}
 
 		$r = q("INSERT INTO `term` (`uid`, `oid`, `otype`, `type`, `term`, `url`, `guid`, `created`, `received`, `global`)
 				VALUES (%d, %d, %d, %d, '%s', '%s', '%s', '%s', '%s', %d)",
-			intval($message["uid"]), intval($itemid), intval(TERM_OBJ_POST), intval($type), dbesc($term),
-			dbesc($link), dbesc($message["guid"]), dbesc($message["created"]), dbesc($message["received"]), intval($global));
+			intval($message['uid']), intval($itemid), intval(TERM_OBJ_POST), intval($type), dbesc($term),
+			dbesc($link), dbesc($message['guid']), dbesc($message['created']), dbesc($message['received']), intval($global));
 
 		// Search for mentions
 		if ((substr($tag, 0, 1) == '@') && (strpos($link, $profile_base_friendica) || strpos($link, $profile_base_diaspora))) {
 			$users = q("SELECT `uid` FROM `contact` WHERE self AND (`url` = '%s' OR `nurl` = '%s')", $link, $link);
 			foreach ($users AS $user) {
-				if ($user["uid"] == $message["uid"]) {
+				if ($user['uid'] == $message['uid']) {
 					q("UPDATE `item` SET `mention` = 1 WHERE `id` = %d", intval($itemid));
 
-					q("UPDATE `thread` SET `mention` = 1 WHERE `iid` = %d", intval($message["parent"]));
+					q("UPDATE `thread` SET `mention` = 1 WHERE `iid` = %d", intval($message['parent']));
 				}
 			}
 		}
 	}
 }
 
-function create_tags_from_itemuri($itemuri, $uid) {
+function create_tags_from_itemuri($itemuri, $uid)
+{
 	$messages = q("SELECT `id` FROM `item` WHERE uri ='%s' AND uid=%d", dbesc($itemuri), intval($uid));
 
 	if (count($messages)) {
 		foreach ($messages as $message) {
-			create_tags_from_item($message["id"]);
+			create_tags_from_item($message['id']);
 		}
 	}
 }
 
-function update_items() {
-
+function update_items()
+{
 	$messages = dba::p("SELECT `oid`,`item`.`guid`, `item`.`created`, `item`.`received` FROM `term` INNER JOIN `item` ON `item`.`id`=`term`.`oid` WHERE `term`.`otype` = 1 AND `term`.`guid` = ''");
 
-	logger("fetched messages: ".dba::num_rows($messages));
+	logger('fetched messages: ' . dba::num_rows($messages));
 	while ($message = dba::fetch($messages)) {
-
-		if ($message["uid"] == 0) {
+		if ($message['uid'] == 0) {
 			$global = true;
 
 			q("UPDATE `term` SET `global` = 1 WHERE `otype` = %d AND `guid` = '%s'",
-				intval(TERM_OBJ_POST), dbesc($message["guid"]));
+				intval(TERM_OBJ_POST), dbesc($message['guid']));
 		} else {
 			$isglobal = q("SELECT `global` FROM `term` WHERE `uid` = 0 AND `otype` = %d AND `guid` = '%s'",
-				intval(TERM_OBJ_POST), dbesc($message["guid"]));
+				intval(TERM_OBJ_POST), dbesc($message['guid']));
 
 			$global = (count($isglobal) > 0);
 		}
 
 		q("UPDATE `term` SET `guid` = '%s', `created` = '%s', `received` = '%s', `global` = %d WHERE `otype` = %d AND `oid` = %d",
-			dbesc($message["guid"]), dbesc($message["created"]), dbesc($message["received"]),
-			intval($global), intval(TERM_OBJ_POST), intval($message["oid"]));
+			dbesc($message['guid']), dbesc($message['created']), dbesc($message['received']),
+			intval($global), intval(TERM_OBJ_POST), intval($message['oid']));
 	}
 
 	dba::close($messages);
 
 	$messages = dba::p("SELECT `guid` FROM `item` WHERE `uid` = 0");
 
-	logger("fetched messages: ".dba::num_rows($messages));
+	logger('fetched messages: ' . dba::num_rows($messages));
 	while ($message = dba::fetch(messages)) {
-		q("UPDATE `item` SET `global` = 1 WHERE `guid` = '%s'", dbesc($message["guid"]));
+		q("UPDATE `item` SET `global` = 1 WHERE `guid` = '%s'", dbesc($message['guid']));
 	}
 
 	dba::close($messages);
@@ -166,21 +174,22 @@ function update_items() {
  *
  * @return arr          Alphabetical sorted array of used tags of an user.
  */
-function tagadelic($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HASHTAG) {
-	require_once('include/security.php');
+function tagadelic($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HASHTAG)
+{
+	require_once 'include/security.php';
 
 	$item_condition = item_condition();
 	$sql_options = item_permissions_sql($uid);
-	$limit = $count ? sprintf("LIMIT %d", intval($count)) : "";
+	$limit = $count ? sprintf('LIMIT %d', intval($count)) : '';
 
 	if ($flags) {
 		if ($flags === 'wall') {
-			$sql_options .= " AND `item`.`wall` ";
+			$sql_options .= ' AND `item`.`wall` ';
 		}
 	}
 
 	if ($owner_id) {
-		$sql_options .= " AND `item`.`owner-id` = ".intval($owner_id)." ";
+		$sql_options .= ' AND `item`.`owner-id` = ' . intval($owner_id) . ' ';
 	}
 
 	// Fetch tags
@@ -194,7 +203,7 @@ function tagadelic($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HA
 		$type,
 		TERM_OBJ_POST
 	);
-	if(!DBM::is_result($r)) {
+	if (!DBM::is_result($r)) {
 		return array();
 	}
 
@@ -212,32 +221,32 @@ function tagadelic($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HA
  *
  * @return string       HTML formatted output.
  */
-function wtagblock($uid, $count = 0,$owner_id = 0, $flags = '', $type = TERM_HASHTAG) {
+function wtagblock($uid, $count = 0, $owner_id = 0, $flags = '', $type = TERM_HASHTAG)
+{
 	$o = '';
 	$r = tagadelic($uid, $count, $owner_id, $flags, $type);
 	if (count($r)) {
 		$contact = dba::select(
-			"contact",
-			array("url"),
-			array("id" => $uid),
-			array("limit" => 1)
+			'contact',
+			array('url'),
+			array('id' => $uid),
+			array('limit' => 1)
 		);
 		$url = System::removedBaseUrl($contact['url']);
 
 		foreach ($r as $rr) {
 			$tag['level'] = $rr[2];
-			$tag['url'] = $url."?tag=".urlencode($rr[0]);
+			$tag['url'] = $url . '?tag=' . urlencode($rr[0]);
 			$tag['name'] = $rr[0];
 
 			$tags[] = $tag;
 		}
 
-		$tpl = get_markup_template("tagblock_widget.tpl");
+		$tpl = get_markup_template('tagblock_widget.tpl');
 		$o = replace_macros($tpl, array(
 			'$title' => t('Tags'),
-			'$tags'  => $tags
+			'$tags' => $tags
 		));
-
 	}
 	return $o;
 }
@@ -248,7 +257,8 @@ function wtagblock($uid, $count = 0,$owner_id = 0, $flags = '', $type = TERM_HAS
  * @param array $arr Array of tags/terms with tag/term name and total count of use.
  * @return array     Alphabetical sorted array of used tags/terms of an user.
  */
-function tag_calc($arr) {
+function tag_calc($arr)
+{
 	$tags = array();
 	$min = 1e9;
 	$max = -1e9;
@@ -285,7 +295,8 @@ function tag_calc($arr) {
  *
  * @return int
  */
-function tags_sort($a, $b) {
+function tags_sort($a, $b)
+{
 	if (strtolower($a[0]) == strtolower($b[0])) {
 		return 0;
 	}
@@ -298,21 +309,22 @@ function tags_sort($a, $b) {
  * @param int     $limit Max number of displayed tags.
  * @return string HTML formattat output.
  */
-function tagcloud_wall_widget($limit = 50) {
+function tagcloud_wall_widget($limit = 50)
+{
 	$a = get_app();
 
-	if(!$a->profile['profile_uid'] || !$a->profile['url']) {
-		return "";
+	if (!$a->profile['profile_uid'] || !$a->profile['url']) {
+		return '';
 	}
 
-	if(Feature::isEnabled($a->profile['profile_uid'], 'tagadelic')) {
+	if (Feature::isEnabled($a->profile['profile_uid'], 'tagadelic')) {
 		$owner_id = Contact::getIdForURL($a->profile['url']);
 
-		if(!$owner_id) {
-			return "";
+		if (!$owner_id) {
+			return '';
 		}
 		return wtagblock($a->profile['profile_uid'], $limit, $owner_id, 'wall');
 	}
 
-	return "";
+	return '';
 }
diff --git a/include/text.php b/include/text.php
index cbba8d0c5..5a24c68ed 100644
--- a/include/text.php
+++ b/include/text.php
@@ -994,7 +994,7 @@ function contact_block() {
 function micropro($contact, $redirect = false, $class = '', $textmode = false) {
 
 	// Use the contact URL if no address is available
-	if ($contact["addr"] == "") {
+	if (!x($contact, "addr")) {
 		$contact["addr"] = $contact["url"];
 	}
 
@@ -1020,7 +1020,7 @@ function micropro($contact, $redirect = false, $class = '', $textmode = false) {
 	}
 
 	return replace_macros(get_markup_template(($textmode)?'micropro_txt.tpl':'micropro_img.tpl'),array(
-		'$click' => (($contact['click']) ? $contact['click'] : ''),
+		'$click' => defaults($contact, 'click', ''),
 		'$class' => $class,
 		'$url' => $url,
 		'$photo' => proxy_url($contact['thumb'], false, PROXY_SIZE_THUMB),
@@ -1202,11 +1202,15 @@ function redir_private_images($a, &$item)
 	}
 }
 
-function put_item_in_cache(&$item, $update = false) {
-
-	if (($item["rendered-hash"] != hash("md5", $item["body"])) || ($item["rendered-hash"] == "") ||
-		($item["rendered-html"] == "") || Config::get("system", "ignore_cache")) {
+function put_item_in_cache(&$item, $update = false)
+{
+	$rendered_hash = defaults($item, 'rendered-hash', '');
 
+	if ($rendered_hash == ''
+		|| $item["rendered-html"] == ""
+		|| $rendered_hash != hash("md5", $item["body"])
+		|| Config::get("system", "ignore_cache")
+	) {
 		// The function "redir_private_images" changes the body.
 		// I'm not sure if we should store it permanently, so we save the old value.
 		$body = $item["body"];
@@ -2026,7 +2030,7 @@ function deindent($text, $chr = "[\t ]", $count = NULL) {
 }
 
 function formatBytes($bytes, $precision = 2) {
-	 $units = array('B', 'KB', 'MB', 'GB', 'TB');
+	$units = array('B', 'KB', 'MB', 'GB', 'TB');
 
 	$bytes = max($bytes, 0);
 	$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
diff --git a/index.php b/index.php
index 2f58321ae..711478fe1 100644
--- a/index.php
+++ b/index.php
@@ -98,6 +98,7 @@ if (!$a->is_backend()) {
 	session_start();
 	$a->save_timestamp($stamp1, "parser");
 } else {
+	$_SESSION = [];
 	Worker::executeIfIdle();
 }
 
diff --git a/mod/contacts.php b/mod/contacts.php
index 3421babf6..c58dc0fc4 100644
--- a/mod/contacts.php
+++ b/mod/contacts.php
@@ -35,8 +35,9 @@ function contacts_init(App $a) {
 
 	require_once 'include/contact_widgets.php';
 
-	if ($_GET['nets'] == "all") {
-		$_GET['nets'] = "";
+	$nets = defaults($_GET, 'nets', '');
+	if ($nets == "all") {
+		$nets = "";
 	}
 
 	if (! x($a->page,'aside')) {
@@ -63,22 +64,22 @@ function contacts_init(App $a) {
 			'$account_type' => Contact::getAccountType($a->data['contact'])
 		));
 
-		$finpeople_widget = '';
+		$findpeople_widget = '';
 		$follow_widget = '';
 		$networks_widget = '';
 	} else {
 		$vcard_widget = '';
-		$networks_widget .= networks_widget('contacts',$_GET['nets']);
+		$networks_widget = networks_widget('contacts', $nets);
 		if (isset($_GET['add'])) {
 			$follow_widget = follow_widget($_GET['add']);
 		} else {
 			$follow_widget = follow_widget();
 		}
 
-		$findpeople_widget .= findpeople_widget();
+		$findpeople_widget = findpeople_widget();
 	}
 
-	$groups_widget .= Group::sidebarWidget('contacts','group','full',0,$contact_id);
+	$groups_widget = Group::sidebarWidget('contacts','group','full',0,$contact_id);
 
 	$a->page['aside'] .= replace_macros(get_markup_template("contacts-widget-sidebar.tpl"),array(
 		'$vcard_widget' => $vcard_widget,
@@ -515,8 +516,6 @@ function contacts_content(App $a) {
 
 		require_once 'include/contact_selectors.php';
 
-		$tpl = get_markup_template("contact_edit.tpl");
-
 		switch($contact['rel']) {
 			case CONTACT_IS_FRIEND:
 				$dir_icon = 'images/lrarrow.gif';
@@ -577,6 +576,7 @@ function contacts_content(App $a) {
 
 		$lost_contact = (($contact['archive'] && $contact['term-date'] > NULL_DATE && $contact['term-date'] < datetime_convert('','','now')) ? t('Communications lost with this contact!') : '');
 
+		$fetch_further_information = null;
 		if ($contact['network'] == NETWORK_FEED) {
 			$fetch_further_information = array('fetch_further_information',
 							t('Fetch further information for feeds'),
@@ -587,12 +587,19 @@ function contacts_content(App $a) {
 									'3' => t('Fetch keywords'),
 									'2' => t('Fetch information and keywords')));
 		}
-		if (in_array($contact['network'], array(NETWORK_FEED, NETWORK_MAIL)))
+
+		$poll_interval = null;
+		if (in_array($contact['network'], array(NETWORK_FEED, NETWORK_MAIL))) {
 			$poll_interval = contact_poll_interval($contact['priority'],(! $poll_enabled));
+		}
 
-		if ($contact['network'] == NETWORK_DFRN)
+		$profile_select = null;
+		if ($contact['network'] == NETWORK_DFRN) {
 			$profile_select = contact_profile_assign($contact['profile-id'],(($contact['network'] !== NETWORK_DFRN) ? true : false));
+		}
 
+		$follow = '';
+		$follow_text = '';
 		if (in_array($contact['network'], array(NETWORK_DIASPORA, NETWORK_OSTATUS))) {
 			if ($contact['rel'] == CONTACT_IS_FOLLOWER) {
 				$follow = System::baseUrl(true)."/follow?url=".urlencode($contact["url"]);
@@ -606,7 +613,7 @@ function contacts_content(App $a) {
 		// Load contactact related actions like hide, suggest, delete and others
 		$contact_actions = contact_actions($contact);
 
-
+		$tpl = get_markup_template("contact_edit.tpl");
 		$o .= replace_macros($tpl, array(
 			//'$header' => t('Contact Editor'),
 			'$header' => t("Contact"),
@@ -618,9 +625,7 @@ function contacts_content(App $a) {
 			'$lbl_info2' => t('Their personal note'),
 			'$reason' => trim(notags($contact['reason'])),
 			'$infedit' => t('Edit contact notes'),
-			'$common_text' => $common_text,
 			'$common_link' => 'common/loc/' . local_user() . '/' . $contact['id'],
-			'$all_friends' => $all_friends,
 			'$relation_text' => $relation_text,
 			'$visit' => sprintf( t('Visit %s\'s profile [%s]'),$contact['name'],$contact['url']),
 			'$blockunblock' => t('Block/Unblock contact'),
@@ -658,7 +663,6 @@ function contacts_content(App $a) {
 			'$photo' => $contact['photo'],
 			'$name' => htmlentities($contact['name']),
 			'$dir_icon' => $dir_icon,
-			'$alt_text' => $alt_text,
 			'$sparkle' => $sparkle,
 			'$url' => $url,
 			'$profileurllabel' => t('Profile URL'),
@@ -688,36 +692,33 @@ function contacts_content(App $a) {
 
 	}
 
-	$blocked = false;
-	$hidden = false;
-	$ignored = false;
-	$all = false;
+	$blocked  = false;
+	$hidden   = false;
+	$ignored  = false;
+	$archived = false;
+	$all      = false;
 
 	if(($a->argc == 2) && ($a->argv[1] === 'all')) {
 		$sql_extra = '';
 		$all = true;
-	}
-	elseif(($a->argc == 2) && ($a->argv[1] === 'blocked')) {
+	} elseif(($a->argc == 2) && ($a->argv[1] === 'blocked')) {
 		$sql_extra = " AND `blocked` = 1 ";
 		$blocked = true;
-	}
-	elseif(($a->argc == 2) && ($a->argv[1] === 'hidden')) {
+	} elseif(($a->argc == 2) && ($a->argv[1] === 'hidden')) {
 		$sql_extra = " AND `hidden` = 1 ";
 		$hidden = true;
-	}
-	elseif(($a->argc == 2) && ($a->argv[1] === 'ignored')) {
+	} elseif(($a->argc == 2) && ($a->argv[1] === 'ignored')) {
 		$sql_extra = " AND `readonly` = 1 ";
 		$ignored = true;
-	}
-	elseif(($a->argc == 2) && ($a->argv[1] === 'archived')) {
+	} elseif(($a->argc == 2) && ($a->argv[1] === 'archived')) {
 		$sql_extra = " AND `archive` = 1 ";
 		$archived = true;
-	}
-	else
+	} else {
 		$sql_extra = " AND `blocked` = 0 ";
+	}
 
-	$search = ((x($_GET,'search')) ? notags(trim($_GET['search'])) : '');
-	$nets = ((x($_GET,'nets')) ? notags(trim($_GET['nets'])) : '');
+	$search = x($_GET, 'search') ? notags(trim($_GET['search'])) : '';
+	$nets = x($_GET, 'nets') ? notags(trim($_GET['nets'])) : '';
 
 	$tabs = array(
 		array(
@@ -786,25 +787,25 @@ function contacts_content(App $a) {
 	$tab_tpl = get_markup_template('common_tabs.tpl');
 	$t = replace_macros($tab_tpl, array('$tabs'=>$tabs));
 
-
-
 	$searching = false;
-	if($search) {
+	$search_hdr = null;
+	if ($search) {
 		$search_hdr = $search;
 		$search_txt = dbesc(protect_sprintf(preg_quote($search)));
 		$searching = true;
 	}
 	$sql_extra .= (($searching) ? " AND (name REGEXP '$search_txt' OR url REGEXP '$search_txt'  OR nick REGEXP '$search_txt') " : "");
 
-	if($nets)
+	if ($nets) {
 		$sql_extra .= sprintf(" AND network = '%s' ", dbesc($nets));
+	}
 
 	$sql_extra2 = ((($sort_type > 0) && ($sort_type <= CONTACT_IS_FRIEND)) ? sprintf(" AND `rel` = %d ",intval($sort_type)) : '');
 
-
 	$r = q("SELECT COUNT(*) AS `total` FROM `contact`
 		WHERE `uid` = %d AND `self` = 0 AND `pending` = 0 $sql_extra $sql_extra2 ",
-		intval($_SESSION['uid']));
+		intval($_SESSION['uid'])
+	);
 	if (DBM::is_result($r)) {
 		$a->set_pager_total($r[0]['total']);
 		$total = $r[0]['total'];
@@ -834,7 +835,7 @@ function contacts_content(App $a) {
 		'$total' => $total,
 		'$search' => $search_hdr,
 		'$desc' => t('Search your contacts'),
-		'$finding' => (($searching) ? sprintf(t('Results for: %s'),$search) : ""),
+		'$finding' => $searching ? t('Results for: %s', $search) : "",
 		'$submit' => t('Find'),
 		'$cmd' => $a->cmd,
 		'$contacts' => $contacts,
@@ -849,7 +850,6 @@ function contacts_content(App $a) {
 		),
 		'$h_batch_actions' => t('Batch Actions'),
 		'$paginate' => paginate($a),
-
 	));
 
 	return $o;
@@ -927,12 +927,11 @@ function contact_posts($a, $contact_id) {
 		$contact = $r[0];
 		$a->page['aside'] = "";
 		profile_load($a, "", 0, Contact::getDetailsByURL($contact["url"]));
-	} else
-		$profile = "";
+	}
 
 	$tab_str = contacts_tab($a, $contact_id, 1);
 
-	$o .= $tab_str;
+	$o = $tab_str;
 
 	$o .= Contact::getPostsFromUrl($contact["url"]);
 
diff --git a/mod/crepair.php b/mod/crepair.php
index 32db9be92..1a135a602 100644
--- a/mod/crepair.php
+++ b/mod/crepair.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file mod/crepair.php
  */
@@ -10,65 +11,68 @@ use Friendica\Model\Contact;
 require_once 'include/contact_selectors.php';
 require_once 'mod/contacts.php';
 
-function crepair_init(App $a) {
-	if (! local_user()) {
+function crepair_init(App $a)
+{
+	if (!local_user()) {
 		return;
 	}
 
 	$contact_id = 0;
 
-	if(($a->argc == 2) && intval($a->argv[1])) {
+	if (($a->argc == 2) && intval($a->argv[1])) {
 		$contact_id = intval($a->argv[1]);
 		$r = q("SELECT * FROM `contact` WHERE `uid` = %d and `id` = %d LIMIT 1",
 			intval(local_user()),
 			intval($contact_id)
 		);
-		if (! DBM::is_result($r)) {
+		if (!DBM::is_result($r)) {
 			$contact_id = 0;
 		}
 	}
 
-	if(! x($a->page,'aside'))
+	if (!x($a->page, 'aside')) {
 		$a->page['aside'] = '';
+	}
 
-	if($contact_id) {
+	if ($contact_id) {
 		$a->data['contact'] = $r[0];
 		$contact = $r[0];
 		profile_load($a, "", 0, Contact::getDetailsByURL($contact["url"]));
 	}
 }
 
-function crepair_post(App $a) {
-	if (! local_user()) {
+function crepair_post(App $a)
+{
+	if (!local_user()) {
 		return;
 	}
 
 	$cid = (($a->argc > 1) ? intval($a->argv[1]) : 0);
 
-	if($cid) {
+	if ($cid) {
 		$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 			intval($cid),
 			intval(local_user())
 		);
 	}
 
-	if (! DBM::is_result($r)) {
+	if (!DBM::is_result($r)) {
 		return;
 	}
 
 	$contact = $r[0];
 
-	$name    = ((x($_POST,'name')) ? $_POST['name'] : $contact['name']);
-	$nick    = ((x($_POST,'nick')) ? $_POST['nick'] : '');
-	$url     = ((x($_POST,'url')) ? $_POST['url'] : '');
-	$request = ((x($_POST,'request')) ? $_POST['request'] : '');
-	$confirm = ((x($_POST,'confirm')) ? $_POST['confirm'] : '');
-	$notify  = ((x($_POST,'notify')) ? $_POST['notify'] : '');
-	$poll    = ((x($_POST,'poll')) ? $_POST['poll'] : '');
-	$attag   = ((x($_POST,'attag')) ? $_POST['attag'] : '');
-	$photo   = ((x($_POST,'photo')) ? $_POST['photo'] : '');
-	$remote_self = ((x($_POST,'remote_self')) ? $_POST['remote_self'] : false);
-	$nurl    = normalise_link($url);
+	$name        = defaults($_POST, 'name'       , $contact['name']);
+	$nick        = defaults($_POST, 'nick'       , '');
+	$url         = defaults($_POST, 'url'        , '');
+	$request     = defaults($_POST, 'request'    , '');
+	$confirm     = defaults($_POST, 'confirm'    , '');
+	$notify      = defaults($_POST, 'notify'     , '');
+	$poll        = defaults($_POST, 'poll'       , '');
+	$attag       = defaults($_POST, 'attag'      , '');
+	$photo       = defaults($_POST, 'photo'      , '');
+	$remote_self = defaults($_POST, 'remote_self', false);
+	$nurl        = normalise_link($url);
 
 	$r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `nurl` = '%s', `request` = '%s', `confirm` = '%s', `notify` = '%s', `poll` = '%s', `attag` = '%s' , `remote_self` = %d
 		WHERE `id` = %d AND `uid` = %d",
@@ -101,26 +105,24 @@ function crepair_post(App $a) {
 	return;
 }
 
-
-
-function crepair_content(App $a) {
-
-	if (! local_user()) {
-		notice( t('Permission denied.') . EOL);
+function crepair_content(App $a)
+{
+	if (!local_user()) {
+		notice(t('Permission denied.') . EOL);
 		return;
 	}
 
 	$cid = (($a->argc > 1) ? intval($a->argv[1]) : 0);
 
-	if($cid) {
+	if ($cid) {
 		$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 			intval($cid),
 			intval(local_user())
 		);
 	}
 
-	if (! DBM::is_result($r)) {
-		notice( t('Contact not found.') . EOL);
+	if (!DBM::is_result($r)) {
+		notice(t('Contact not found.') . EOL);
 		return;
 	}
 
@@ -131,45 +133,44 @@ function crepair_content(App $a) {
 
 	$returnaddr = "contacts/$cid";
 
-	$allow_remote_self = Config::get('system','allow_users_remote_self');
+	$allow_remote_self = Config::get('system', 'allow_users_remote_self');
 
 	// Disable remote self for everything except feeds.
 	// There is an issue when you repeat an item from maybe twitter and you got comments from friendica and twitter
 	// Problem is, you couldn't reply to both networks.
-	if (!in_array($contact['network'], array(NETWORK_FEED, NETWORK_DFRN, NETWORK_DIASPORA)))
+	if (!in_array($contact['network'], array(NETWORK_FEED, NETWORK_DFRN, NETWORK_DIASPORA))) {
 		$allow_remote_self = false;
+	}
 
-	if ($contact['network'] == NETWORK_FEED)
-		$remote_self_options = array('0'=>t('No mirroring'), '1'=>t('Mirror as forwarded posting'), '2'=>t('Mirror as my own posting'));
-	else
-		$remote_self_options = array('0'=>t('No mirroring'), '2'=>t('Mirror as my own posting'));
+	if ($contact['network'] == NETWORK_FEED) {
+		$remote_self_options = array('0' => t('No mirroring'), '1' => t('Mirror as forwarded posting'), '2' => t('Mirror as my own posting'));
+	} else {
+		$remote_self_options = array('0' => t('No mirroring'), '2' => t('Mirror as my own posting'));
+	}
 
-	$update_profile = in_array($contact['network'], array(NETWORK_DFRN, NETWORK_DSPR, NETWORK_OSTATUS));
+	$update_profile = in_array($contact['network'], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS));
 
 	$tab_str = contacts_tab($a, $contact['id'], 5);
 
-
 	$tpl = get_markup_template('crepair.tpl');
-	$o .= replace_macros($tpl, array(
-		//'$title'	=> t('Repair Contact Settings'),
-		'$tab_str'	=> $tab_str,
-		'$warning'	=> $warning,
-		'$info'		=> $info,
-		'$returnaddr'	=> $returnaddr,
-		'$return'	=> t('Return to contact editor'),
-		'$update_profile' => update_profile,
-		'$udprofilenow' => t('Refetch contact data'),
-		'$contact_id'	=> $contact['id'],
-		'$lbl_submit'	=> t('Submit'),
-
+	$o = replace_macros($tpl, array(
+		'$tab_str'        => $tab_str,
+		'$warning'        => $warning,
+		'$info'           => $info,
+		'$returnaddr'     => $returnaddr,
+		'$return'         => t('Return to contact editor'),
+		'$update_profile' => $update_profile,
+		'$udprofilenow'   => t('Refetch contact data'),
+		'$contact_id'     => $contact['id'],
+		'$lbl_submit'     => t('Submit'),
 		'$label_remote_self' => t('Remote Self'),
 		'$allow_remote_self' => $allow_remote_self,
 		'$remote_self' => array('remote_self',
-					t('Mirror postings from this contact'),
-					$contact['remote_self'],
-					t('Mark this contact as remote_self, this will cause friendica to repost new entries from this contact.'),
-					$remote_self_options
-				),
+			t('Mirror postings from this contact'),
+			$contact['remote_self'],
+			t('Mark this contact as remote_self, this will cause friendica to repost new entries from this contact.'),
+			$remote_self_options
+		),
 
 		'$name'		=> array('name', t('Name') , htmlentities($contact['name'])),
 		'$nick'		=> array('nick', t('Account Nickname'), htmlentities($contact['nick'])),
@@ -183,5 +184,4 @@ function crepair_content(App $a) {
 	));
 
 	return $o;
-
 }
diff --git a/mod/dfrn_confirm.php b/mod/dfrn_confirm.php
index 112ee34ab..a5f5f1bd3 100644
--- a/mod/dfrn_confirm.php
+++ b/mod/dfrn_confirm.php
@@ -29,6 +29,7 @@ use Friendica\Model\Group;
 use Friendica\Model\User;
 use Friendica\Network\Probe;
 use Friendica\Protocol\Diaspora;
+use Friendica\Util\Crypto;
 
 require_once 'include/enotify.php';
 
@@ -162,9 +163,7 @@ function dfrn_confirm_post(App $a, $handsfree = null) {
 			 * worried about key leakage than anybody cracking it.
 			 *
 			 */
-			require_once 'include/crypto.php';
-
-			$res = new_keypair(4096);
+			$res = Crypto::newKeypair(4096);
 
 
 			$private_key = $res['prvkey'];
diff --git a/mod/dfrn_poll.php b/mod/dfrn_poll.php
index d27c7d621..69e86f1bc 100644
--- a/mod/dfrn_poll.php
+++ b/mod/dfrn_poll.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file mod/dfrn_poll.php
  */
@@ -12,49 +13,50 @@ use Friendica\Protocol\OStatus;
 
 require_once 'include/items.php';
 
-function dfrn_poll_init(App $a) {
+function dfrn_poll_init(App $a)
+{
 	Login::sessionAuth();
 
-	$dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
-	$type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
-	$last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
-	$destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
-	$challenge       = ((x($_GET,'challenge'))       ? $_GET['challenge']            : '');
-	$sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
-	$dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
-	$perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
-	$quiet			 = ((x($_GET,'quiet'))			 ? true							 : false);
+	$dfrn_id         = defaults($_GET, 'dfrn_id'        , '');
+	$type            = defaults($_GET, 'type'           , 'data');
+	$last_update     = defaults($_GET, 'last_update'    , '');
+	$destination_url = defaults($_GET, 'destination_url', '');
+	$challenge       = defaults($_GET, 'challenge'      , '');
+	$sec             = defaults($_GET, 'sec'            , '');
+	$dfrn_version    = defaults($_GET, 'dfrn_version'   , 2.0);
+	$perm            = defaults($_GET, 'perm'           , 'r');
+	$quiet			 = x($_GET, 'quiet');
 
 	// Possibly it is an OStatus compatible server that requests a user feed
 	if (($a->argc > 1) && ($dfrn_id == '') && !strstr($_SERVER["HTTP_USER_AGENT"], 'Friendica')) {
 		$nickname = $a->argv[1];
 		header("Content-type: application/atom+xml");
-		echo OStatus::feed($a, $nickname, $last_update, 10);
+		echo OStatus::feed($nickname, $last_update, 10);
 		killme();
 	}
 
-	$direction = (-1);
+	$direction = -1;
 
-
-	if(strpos($dfrn_id,':') == 1) {
-		$direction = intval(substr($dfrn_id,0,1));
-		$dfrn_id   = substr($dfrn_id,2);
+	if (strpos($dfrn_id, ':') == 1) {
+		$direction = intval(substr($dfrn_id, 0, 1));
+		$dfrn_id = substr($dfrn_id, 2);
 	}
 
 	$hidewall = false;
 
-	if(($dfrn_id === '') && (! x($_POST,'dfrn_id'))) {
-		if((Config::get('system','block_public')) && (! local_user()) && (! remote_user())) {
+	if (($dfrn_id === '') && (!x($_POST, 'dfrn_id'))) {
+		if (Config::get('system', 'block_public') && !local_user() && !remote_user()) {
 			http_status_exit(403);
 		}
 
 		$user = '';
-		if($a->argc > 1) {
+		if ($a->argc > 1) {
 			$r = q("SELECT `hidewall`,`nickname` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
 				dbesc($a->argv[1])
 			);
-			if (!$r)
+			if (!$r) {
 				http_status_exit(404);
+			}
 
 			$hidewall = ($r[0]['hidewall'] && !local_user());
 
@@ -63,16 +65,15 @@ function dfrn_poll_init(App $a) {
 
 		logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] . ' for ' . $user);
 		header("Content-type: application/atom+xml");
-		echo DFRN::feed('', $user,$last_update, 0, $hidewall);
+		echo DFRN::feed('', $user, $last_update, 0, $hidewall);
 		killme();
 	}
 
-	if(($type === 'profile') && (! strlen($sec))) {
-
+	if (($type === 'profile') && (!strlen($sec))) {
 		$sql_extra = '';
-		switch($direction) {
-			case (-1):
-				$sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
+		switch ($direction) {
+			case -1:
+				$sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
 				$my_id = $dfrn_id;
 				break;
 			case 0:
@@ -96,28 +97,29 @@ function dfrn_poll_init(App $a) {
 		);
 
 		if (DBM::is_result($r)) {
-
 			$s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
 
 			logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
 
-			if(strlen($s)) {
-
+			if (strlen($s)) {
 				$xml = parse_xml_string($s);
 
-				if((int) $xml->status == 1) {
+				if ((int) $xml->status === 1) {
 					$_SESSION['authenticated'] = 1;
-					if(! x($_SESSION,'remote'))
+					if (!x($_SESSION, 'remote')) {
 						$_SESSION['remote'] = array();
+					}
 
-					$_SESSION['remote'][] = array('cid' => $r[0]['id'],'uid' => $r[0]['uid'],'url' => $r[0]['url']);
+					$_SESSION['remote'][] = array('cid' => $r[0]['id'], 'uid' => $r[0]['uid'], 'url' => $r[0]['url']);
 
 					$_SESSION['visitor_id'] = $r[0]['id'];
 					$_SESSION['visitor_home'] = $r[0]['url'];
 					$_SESSION['visitor_handle'] = $r[0]['addr'];
 					$_SESSION['visitor_visiting'] = $r[0]['uid'];
-					if(!$quiet)
-						info( sprintf(t('%1$s welcomes %2$s'), $r[0]['username'] , $r[0]['name']) . EOL);
+					if (!$quiet) {
+						info(sprintf(t('%1$s welcomes %2$s'), $r[0]['username'], $r[0]['name']) . EOL);
+					}
+
 					// Visitors get 1 day session.
 					$session_id = session_id();
 					$expire = time() + 86400;
@@ -131,53 +133,53 @@ function dfrn_poll_init(App $a) {
 			goaway((strlen($destination_url)) ? $destination_url : System::baseUrl() . '/profile/' . $profile);
 		}
 		goaway(System::baseUrl());
-
 	}
 
-	if($type === 'profile-check' && $dfrn_version < 2.2 ) {
-
-		if((strlen($challenge)) && (strlen($sec))) {
-
+	if ($type === 'profile-check' && $dfrn_version < 2.2) {
+		if ((strlen($challenge)) && (strlen($sec))) {
 			q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 			$r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 				dbesc($sec)
 			);
-			if (! DBM::is_result($r)) {
+			if (!DBM::is_result($r)) {
 				xml_status(3, 'No ticket');
 				// NOTREACHED
 			}
+
 			$orig_id = $r[0]['dfrn_id'];
-			if(strpos($orig_id, ':'))
-				$orig_id = substr($orig_id,2);
+			if (strpos($orig_id, ':')) {
+				$orig_id = substr($orig_id, 2);
+			}
 
 			$c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 				intval($r[0]['cid'])
 			);
-			if (! DBM::is_result($c)) {
+			if (!DBM::is_result($c)) {
 				xml_status(3, 'No profile');
 			}
+
 			$contact = $c[0];
 
 			$sent_dfrn_id = hex2bin($dfrn_id);
-			$challenge    = hex2bin($challenge);
+			$challenge = hex2bin($challenge);
 
 			$final_dfrn_id = '';
 
-			if(($contact['duplex']) && strlen($contact['prvkey'])) {
-				openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
-				openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
-			}
-			else {
-				openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
-				openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
+			if (($contact['duplex']) && strlen($contact['prvkey'])) {
+				openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
+				openssl_private_decrypt($challenge, $decoded_challenge, $contact['prvkey']);
+			} else {
+				openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
+				openssl_public_decrypt($challenge, $decoded_challenge, $contact['pubkey']);
 			}
 
 			$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 
-			if(strpos($final_dfrn_id,':') == 1)
-				$final_dfrn_id = substr($final_dfrn_id,2);
+			if (strpos($final_dfrn_id, ':') == 1) {
+				$final_dfrn_id = substr($final_dfrn_id, 2);
+			}
 
-			if($final_dfrn_id != $orig_id) {
+			if ($final_dfrn_id != $orig_id) {
 				logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 				// did not decode properly - cannot trust this site
 				xml_status(3, 'Bad decryption');
@@ -187,11 +189,9 @@ function dfrn_poll_init(App $a) {
 			echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 			killme();
 			// NOTREACHED
-		}
-		else {
-				// old protocol
-
-			switch($direction) {
+		} else {
+			// old protocol
+			switch ($direction) {
 				case 1:
 					$dfrn_id = '0:' . $dfrn_id;
 					break;
@@ -202,7 +202,6 @@ function dfrn_poll_init(App $a) {
 					break;
 			}
 
-
 			q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 			$r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
 				dbesc($dfrn_id));
@@ -214,67 +213,65 @@ function dfrn_poll_init(App $a) {
 			return; // NOTREACHED
 		}
 	}
-
 }
 
+function dfrn_poll_post(App $a)
+{
+	$dfrn_id      = x($_POST,'dfrn_id')      ? $_POST['dfrn_id']              : '';
+	$challenge    = x($_POST,'challenge')    ? $_POST['challenge']            : '';
+	$url          = x($_POST,'url')          ? $_POST['url']                  : '';
+	$sec          = x($_POST,'sec')          ? $_POST['sec']                  : '';
+	$ptype        = x($_POST,'type')         ? $_POST['type']                 : '';
+	$dfrn_version = x($_POST,'dfrn_version') ? (float) $_POST['dfrn_version'] : 2.0;
+	$perm         = x($_POST,'perm')         ? $_POST['perm']                 : 'r';
 
-
-function dfrn_poll_post(App $a) {
-
-	$dfrn_id      = ((x($_POST,'dfrn_id'))      ? $_POST['dfrn_id']              : '');
-	$challenge    = ((x($_POST,'challenge'))    ? $_POST['challenge']            : '');
-	$url          = ((x($_POST,'url'))          ? $_POST['url']                  : '');
-	$sec          = ((x($_POST,'sec'))          ? $_POST['sec']                  : '');
-	$ptype        = ((x($_POST,'type'))         ? $_POST['type']                 : '');
-	$dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
-	$perm         = ((x($_POST,'perm'))         ? $_POST['perm']                 : 'r');
-
-	if($ptype === 'profile-check') {
-
-		if((strlen($challenge)) && (strlen($sec))) {
-
+	if ($ptype === 'profile-check') {
+		if (strlen($challenge) && strlen($sec)) {
 			logger('dfrn_poll: POST: profile-check');
 
 			q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 			$r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 				dbesc($sec)
 			);
-			if (! DBM::is_result($r)) {
+			if (!DBM::is_result($r)) {
 				xml_status(3, 'No ticket');
 				// NOTREACHED
 			}
+
 			$orig_id = $r[0]['dfrn_id'];
-			if(strpos($orig_id, ':'))
-				$orig_id = substr($orig_id,2);
+			if (strpos($orig_id, ':')) {
+				$orig_id = substr($orig_id, 2);
+			}
 
 			$c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 				intval($r[0]['cid'])
 			);
-			if (! DBM::is_result($c)) {
+			if (!DBM::is_result($c)) {
 				xml_status(3, 'No profile');
 			}
+
 			$contact = $c[0];
 
 			$sent_dfrn_id = hex2bin($dfrn_id);
-			$challenge    = hex2bin($challenge);
+			$challenge = hex2bin($challenge);
 
 			$final_dfrn_id = '';
 
-			if(($contact['duplex']) && strlen($contact['prvkey'])) {
-				openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
-				openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
-			}
-			else {
-				openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
-				openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
+			if ($contact['duplex'] && strlen($contact['prvkey'])) {
+				openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
+				openssl_private_decrypt($challenge, $decoded_challenge, $contact['prvkey']);
+			} else {
+				openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
+				openssl_public_decrypt($challenge, $decoded_challenge, $contact['pubkey']);
 			}
 
 			$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 
-			if(strpos($final_dfrn_id,':') == 1)
-				$final_dfrn_id = substr($final_dfrn_id,2);
+			if (strpos($final_dfrn_id, ':') == 1) {
+				$final_dfrn_id = substr($final_dfrn_id, 2);
+			}
 
-			if($final_dfrn_id != $orig_id) {
+			if ($final_dfrn_id != $orig_id) {
 				logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 				// did not decode properly - cannot trust this site
 				xml_status(3, 'Bad decryption');
@@ -285,22 +282,20 @@ function dfrn_poll_post(App $a) {
 			killme();
 			// NOTREACHED
 		}
-
 	}
 
-	$direction    = (-1);
-	if(strpos($dfrn_id,':') == 1) {
-		$direction = intval(substr($dfrn_id,0,1));
-		$dfrn_id   = substr($dfrn_id,2);
+	$direction = -1;
+	if (strpos($dfrn_id, ':') == 1) {
+		$direction = intval(substr($dfrn_id, 0, 1));
+		$dfrn_id = substr($dfrn_id, 2);
 	}
 
-
 	$r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 		dbesc($dfrn_id),
 		dbesc($challenge)
 	);
 
-	if (! DBM::is_result($r)) {
+	if (!DBM::is_result($r)) {
 		killme();
 	}
 
@@ -314,8 +309,8 @@ function dfrn_poll_post(App $a) {
 
 
 	$sql_extra = '';
-	switch($direction) {
-		case (-1):
+	switch ($direction) {
+		case -1:
 			$sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 			$my_id = $dfrn_id;
 			break;
@@ -332,11 +327,8 @@ function dfrn_poll_post(App $a) {
 			break; // NOTREACHED
 	}
 
-
 	$r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
-
-
-	if (! DBM::is_result($r)) {
+	if (!DBM::is_result($r)) {
 		killme();
 	}
 
@@ -344,8 +336,7 @@ function dfrn_poll_post(App $a) {
 	$owner_uid = $r[0]['uid'];
 	$contact_id = $r[0]['id'];
 
-
-	if($type === 'reputation' && strlen($url)) {
+	if ($type === 'reputation' && strlen($url)) {
 		$r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 			dbesc($url),
 			intval($owner_uid)
@@ -357,7 +348,7 @@ function dfrn_poll_post(App $a) {
 			$reputation = $r[0]['rating'];
 			$text = $r[0]['reason'];
 
-			if($r[0]['id'] == $contact_id) {	// inquiring about own reputation not allowed
+			if ($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed
 				$reputation = 0;
 				$text = '';
 			}
@@ -372,18 +363,17 @@ function dfrn_poll_post(App $a) {
 		";
 		killme();
 		// NOTREACHED
-	}
-	else {
-
+	} else {
 		// Update the writable flag if it changed
-		logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
-		if($dfrn_version >= 2.21) {
-			if($perm === 'rw')
+		logger('dfrn_poll: post request feed: ' . print_r($_POST, true), LOGGER_DATA);
+		if ($dfrn_version >= 2.21) {
+			if ($perm === 'rw') {
 				$writable = 1;
-			else
+			} else {
 				$writable = 0;
+			}
 
-			if($writable !=  $contact['writable']) {
+			if ($writable != $contact['writable']) {
 				q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d",
 					intval($writable),
 					intval($contact_id)
@@ -395,29 +385,27 @@ function dfrn_poll_post(App $a) {
 		$o = DFRN::feed($dfrn_id, $a->argv[1], $last_update, $direction);
 		echo $o;
 		killme();
-
 	}
 }
 
-function dfrn_poll_content(App $a) {
+function dfrn_poll_content(App $a)
+{
+	$dfrn_id         = x($_GET,'dfrn_id')         ? $_GET['dfrn_id']              : '';
+	$type            = x($_GET,'type')            ? $_GET['type']                 : 'data';
+	$last_update     = x($_GET,'last_update')     ? $_GET['last_update']          : '';
+	$destination_url = x($_GET,'destination_url') ? $_GET['destination_url']      : '';
+	$sec             = x($_GET,'sec')             ? $_GET['sec']                  : '';
+	$dfrn_version    = x($_GET,'dfrn_version')    ? (float) $_GET['dfrn_version'] : 2.0;
+	$perm            = x($_GET,'perm')            ? $_GET['perm']                 : 'r';
+	$quiet           = x($_GET,'quiet')           ? true                          : false;
 
-	$dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
-	$type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
-	$last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
-	$destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
-	$sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
-	$dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
-	$perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
-	$quiet		 = ((x($_GET,'quiet'))           ? true	                         : false);
-
-	$direction = (-1);
-	if(strpos($dfrn_id,':') == 1) {
-		$direction = intval(substr($dfrn_id,0,1));
-		$dfrn_id = substr($dfrn_id,2);
+	$direction = -1;
+	if (strpos($dfrn_id, ':') == 1) {
+		$direction = intval(substr($dfrn_id, 0, 1));
+		$dfrn_id = substr($dfrn_id, 2);
 	}
 
-
-	if($dfrn_id != '') {
+	if ($dfrn_id != '') {
 		// initial communication from external contact
 		$hash = random_string();
 
@@ -425,7 +413,7 @@ function dfrn_poll_content(App $a) {
 
 		$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 
-		if($type !== 'profile') {
+		if ($type !== 'profile') {
 			$r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
 				VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
 				dbesc($hash),
@@ -435,13 +423,16 @@ function dfrn_poll_content(App $a) {
 				dbesc($last_update)
 			);
 		}
+
 		$sql_extra = '';
-		switch($direction) {
-			case (-1):
-				if($type === 'profile')
-					$sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
-				else
+		switch ($direction) {
+			case -1:
+				if ($type === 'profile') {
+					$sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
+				} else {
 					$sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
+				}
+
 				$my_id = $dfrn_id;
 				break;
 			case 0:
@@ -465,36 +456,30 @@ function dfrn_poll_content(App $a) {
 			AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
 			dbesc($nickname)
 		);
-
 		if (DBM::is_result($r)) {
-
 			$challenge = '';
 			$encrypted_id = '';
-			$id_str = $my_id . '.' . mt_rand(1000,9999);
+			$id_str = $my_id . '.' . mt_rand(1000, 9999);
 
-			if(($r[0]['duplex'] && strlen($r[0]['pubkey'])) || (! strlen($r[0]['prvkey']))) {
-				openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
-				openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
-			}
-			else {
-				openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
-				openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
+			if (($r[0]['duplex'] && strlen($r[0]['pubkey'])) || !strlen($r[0]['prvkey'])) {
+				openssl_public_encrypt($hash, $challenge, $r[0]['pubkey']);
+				openssl_public_encrypt($id_str, $encrypted_id, $r[0]['pubkey']);
+			} else {
+				openssl_private_encrypt($hash, $challenge, $r[0]['prvkey']);
+				openssl_private_encrypt($id_str, $encrypted_id, $r[0]['prvkey']);
 			}
 
 			$challenge = bin2hex($challenge);
 			$encrypted_id = bin2hex($encrypted_id);
-		}
-		else {
+		} else {
 			$status = 1;
 			$challenge = '';
 			$encrypted_id = '';
 		}
 
-		if(($type === 'profile') && (strlen($sec))) {
-
+		if (($type === 'profile') && (strlen($sec))) {
 			// URL reply
-
-			if($dfrn_version < 2.2) {
+			if ($dfrn_version < 2.2) {
 				$s = fetch_url($r[0]['poll']
 					. '?dfrn_id=' . $encrypted_id
 					. '&type=profile-check'
@@ -502,8 +487,7 @@ function dfrn_poll_content(App $a) {
 					. '&challenge=' . $challenge
 					. '&sec=' . $sec
 				);
-			}
-			else {
+			} else {
 				$s = post_url($r[0]['poll'], array(
 					'dfrn_id' => $encrypted_id,
 					'type' => 'profile-check',
@@ -515,7 +499,7 @@ function dfrn_poll_content(App $a) {
 
 			$profile = ((DBM::is_result($r) && $r[0]['nickname']) ? $r[0]['nickname'] : $nickname);
 
-			switch($destination_url) {
+			switch ($destination_url) {
 				case 'profile':
 					$dest = System::baseUrl() . '/profile/' . $profile . '?f=&tab=profile';
 					break;
@@ -534,26 +518,28 @@ function dfrn_poll_content(App $a) {
 
 			logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
 
-			if(strlen($s) && strstr($s,'<?xml')) {
-
+			if (strlen($s) && strstr($s, '<?xml')) {
 				$xml = parse_xml_string($s);
 
-				logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
+				logger('dfrn_poll: profile: parsed xml: ' . print_r($xml, true), LOGGER_DATA);
 
 				logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
 				logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
 
-
-				if(((int) $xml->status == 0) && ($xml->challenge == $hash)  && ($xml->sec == $sec)) {
+				if (((int) $xml->status == 0) && ($xml->challenge == $hash) && ($xml->sec == $sec)) {
 					$_SESSION['authenticated'] = 1;
-					if(! x($_SESSION,'remote'))
+					if (!x($_SESSION, 'remote')) {
 						$_SESSION['remote'] = array();
-					$_SESSION['remote'][] = array('cid' => $r[0]['id'],'uid' => $r[0]['uid'],'url' => $r[0]['url']);
+					}
+
+					$_SESSION['remote'][] = array('cid' => $r[0]['id'], 'uid' => $r[0]['uid'], 'url' => $r[0]['url']);
 					$_SESSION['visitor_id'] = $r[0]['id'];
 					$_SESSION['visitor_home'] = $r[0]['url'];
 					$_SESSION['visitor_visiting'] = $r[0]['uid'];
-					if(!$quiet)
-						info( sprintf(t('%1$s welcomes %2$s'), $r[0]['username'] , $r[0]['name']) . EOL);
+					if (!$quiet) {
+						info(sprintf(t('%1$s welcomes %2$s'), $r[0]['username'], $r[0]['name']) . EOL);
+					}
+
 					// Visitors get 1 day session.
 					$session_id = session_id();
 					$expire = time() + 86400;
@@ -567,9 +553,7 @@ function dfrn_poll_content(App $a) {
 			}
 			goaway($dest);
 			// NOTREACHED
-
-		}
-		else {
+		} else {
 			// XML reply
 			header("Content-type: text/xml");
 			echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
@@ -578,7 +562,7 @@ function dfrn_poll_content(App $a) {
 				. "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 				. "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 				. "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
-				. '</dfrn_poll>' . "\r\n" ;
+				. '</dfrn_poll>' . "\r\n";
 			killme();
 			// NOTREACHED
 		}
diff --git a/mod/display.php b/mod/display.php
index 67e6f435e..2d91d2d1a 100644
--- a/mod/display.php
+++ b/mod/display.php
@@ -202,8 +202,9 @@ function display_content(App $a, $update = false, $update_uid = 0) {
 
 	if ($update) {
 		$item_id = $_REQUEST['item_id'];
-		$item = dba::select('item', ['uid'], ['id' => $item_id], ['limit' => 1]);
+		$item = dba::select('item', ['uid', 'parent'], ['id' => $item_id], ['limit' => 1]);
 		$a->profile = array('uid' => intval($item['uid']), 'profile_uid' => intval($item['uid']));
+		$item_parent = $item['parent'];
 	} else {
 		$item_id = (($a->argc > 2) ? $a->argv[2] : 0);
 
@@ -261,7 +262,7 @@ function display_content(App $a, $update = false, $update_uid = 0) {
 
 	$contact_id = 0;
 
-	if (is_array($_SESSION['remote'])) {
+	if (x($_SESSION, 'remote') && is_array($_SESSION['remote'])) {
 		foreach ($_SESSION['remote'] as $v) {
 			if ($v['uid'] == $a->profile['uid']) {
 				$contact_id = $v['cid'];
@@ -295,7 +296,7 @@ function display_content(App $a, $update = false, $update_uid = 0) {
 	}
 	$is_owner = (local_user() && (in_array($a->profile['profile_uid'], [local_user(), 0])) ? true : false);
 
-	if ($a->profile['hidewall'] && !$is_owner && !$remote_contact) {
+	if (x($a->profile, 'hidewall') && !$is_owner && !$remote_contact) {
 		notice(t('Access to this profile has been restricted.') . EOL);
 		return;
 	}
diff --git a/mod/events.php b/mod/events.php
index 7a05274e2..eb804b5d6 100644
--- a/mod/events.php
+++ b/mod/events.php
@@ -20,7 +20,7 @@ function events_init(App $a) {
 		return;
 	}
 
-	if ($a->argc == 1) {
+	if ($a->argc > 1) {
 		// If it's a json request abort here because we don't
 		// need the widget data
 		if ($a->argv[1] === 'json') {
@@ -234,6 +234,7 @@ function events_content(App $a) {
 	));
 
 	$o = '';
+	$tabs = '';
 	// tabs
 	if ($a->theme_events_in_profile) {
 		$tabs = profile_tabs($a, true);
@@ -309,10 +310,13 @@ function events_content(App $a) {
 		$start  = sprintf('%d-%d-%d %d:%d:%d', $y, $m, 1, 0, 0, 0);
 		$finish = sprintf('%d-%d-%d %d:%d:%d', $y, $m, $dim, 23, 59, 59);
 
-
-		if ($a->argv[1] === 'json') {
-			if (x($_GET, 'start')) {$start  = $_GET['start'];}
-			if (x($_GET, 'end'))   {$finish = $_GET['end'];}
+		if ($a->argc > 1 && $a->argv[1] === 'json') {
+			if (x($_GET, 'start')) {
+				$start  = $_GET['start'];
+			}
+			if (x($_GET, 'end'))   {
+				$finish = $_GET['end'];
+			}
 		}
 
 		$start  = datetime_convert('UTC', 'UTC', $start);
@@ -358,7 +362,7 @@ function events_content(App $a) {
 			$events = process_events($r);
 		}
 
-		if ($a->argv[1] === 'json'){
+		if ($a->argc > 1 && $a->argv[1] === 'json'){
 			echo json_encode($events);
 			killme();
 		}
diff --git a/mod/fetch.php b/mod/fetch.php
index 68f6acc91..c097ee4c4 100644
--- a/mod/fetch.php
+++ b/mod/fetch.php
@@ -8,8 +8,6 @@ use Friendica\Core\System;
 use Friendica\Protocol\Diaspora;
 use Friendica\Util\XML;
 
-require_once "include/crypto.php";
-
 function fetch_init(App $a)
 {
 
diff --git a/mod/hostxrd.php b/mod/hostxrd.php
index 0403945ef..1da8fda99 100644
--- a/mod/hostxrd.php
+++ b/mod/hostxrd.php
@@ -1,18 +1,21 @@
 <?php
-
+/**
+ * @file mod/hostxrd.php
+ */
 use Friendica\App;
 use Friendica\Core\Config;
 use Friendica\Core\System;
+use Friendica\Protocol\Salmon;
+use Friendica\Util\Crypto;
 
-require_once('include/crypto.php');
-
-function hostxrd_init(App $a) {
+function hostxrd_init(App $a)
+{
 	header('Access-Control-Allow-Origin: *');
 	header("Content-type: text/xml");
-	$pubkey = Config::get('system','site_pubkey');
+	$pubkey = Config::get('system', 'site_pubkey');
 
-	if(! $pubkey) {
-		$res = new_keypair(1024);
+	if (! $pubkey) {
+		$res = Crypto::newKeypair(1024);
 
 		Config::set('system','site_prvkey', $res['prvkey']);
 		Config::set('system','site_pubkey', $res['pubkey']);
@@ -23,8 +26,8 @@ function hostxrd_init(App $a) {
 		'$zhost' => $a->get_hostname(),
 		'$zroot' => System::baseUrl(),
 		'$domain' => System::baseUrl(),
-		'$bigkey' => salmon_key(Config::get('system','site_pubkey')),
-	));
-	exit();
+		'$bigkey' => Salmon::salmonKey(Config::get('system', 'site_pubkey')))
+	);
 
+	exit();
 }
diff --git a/mod/hovercard.php b/mod/hovercard.php
index 8ad5cd0eb..29dfd2689 100644
--- a/mod/hovercard.php
+++ b/mod/hovercard.php
@@ -7,90 +7,87 @@
  * Author: Rabuzarus <https://github.com/rabuzarus>
  * License: GNU AFFERO GENERAL PUBLIC LICENSE (Version 3)
  */
-
 use Friendica\App;
 use Friendica\Core\Config;
 use Friendica\Model\Contact;
 use Friendica\Model\GContact;
 
-function hovercard_init(App $a) {
+function hovercard_init(App $a)
+{
 	// Just for testing purposes
-	$_GET["mode"] = "minimal";
+	$_GET['mode'] = 'minimal';
 }
 
-function hovercard_content() {
-	$profileurl	=	(x($_REQUEST,'profileurl')	? $_REQUEST['profileurl']	: "");
-	$datatype	=	(x($_REQUEST,'datatype')	?$_REQUEST['datatype']		: "json");
+function hovercard_content()
+{
+	$profileurl = defaults($_REQUEST, 'profileurl', '');
+	$datatype   = defaults($_REQUEST, 'datatype'  , 'json');
 
 	// Get out if the system doesn't have public access allowed
-	if(intval(Config::get('system','block_public')))
+	if (intval(Config::get('system', 'block_public'))) {
 		http_status_exit(401);
+	}
 
 	// Return the raw content of the template. We use this to make templates usable for js functions.
 	// Look at hovercard.js (function getHoverCardTemplate()).
-	// This part should be moved in it's own module. Maybe we could make more templates accessabel.
-	// (We need to discuss possible security lacks before doing this)
-	if ($datatype == "tpl") {
-		$templatecontent = get_template_content("hovercard.tpl");
+	// This part should be moved in its own module. Maybe we could make more templates accessible.
+	// (We need to discuss possible security leaks before doing this)
+	if ($datatype == 'tpl') {
+		$templatecontent = get_template_content('hovercard.tpl');
 		echo $templatecontent;
 		killme();
 	}
 
-	// If a contact is connected the url is internally changed to "redir/CID". We need the pure url to search for
+	// If a contact is connected the url is internally changed to 'redir/CID'. We need the pure url to search for
 	// the contact. So we strip out the contact id from the internal url and look in the contact table for
 	// the real url (nurl)
-	if (local_user() && strpos($profileurl, "redir/") === 0) {
+	$cid = 0;
+	if (local_user() && strpos($profileurl, 'redir/') === 0) {
 		$cid = intval(substr($profileurl, 6));
-		$r = dba::select('contact', array('nurl', 'self'), array('id' => $cid), array('limit' => 1));
-		$profileurl = ($r["nurl"] ? $r["nurl"] : "");
-		$self = ($r["self"] ? $r["self"] : "");
+		$r = dba::select('contact', array('nurl'), array('id' => $cid), array('limit' => 1));
+		$profileurl = defaults($r, 'nurl', '');
 	}
 
+	$contact = [];
 	// if it's the url containing https it should be converted to http
 	$nurl = normalise_link(GContact::cleanContactUrl($profileurl));
-	if($nurl) {
+	if ($nurl) {
 		// Search for contact data
 		$contact = Contact::getDetailsByURL($nurl);
 	}
-	if(!is_array($contact))
+	if (!count($contact)) {
 		return;
+	}
 
 	// Get the photo_menu - the menu if possible contact actions
-	if(local_user())
+	if (local_user()) {
 		$actions = Contact::photoMenu($contact);
-
+	}
 
 	// Move the contact data to the profile array so we can deliver it to
-	//
 	$profile = array(
-		'name' => $contact["name"],
-		'nick'	=> $contact["nick"],
-		'addr'	=> (($contact["addr"] != "") ? $contact["addr"] : $contact["url"]),
-		'thumb' => proxy_url($contact["thumb"], false, PROXY_SIZE_THUMB),
-		'url' => ($cid ? ("redir/".$cid) : zrl($contact["url"])),
-		'nurl' => $contact["nurl"], // We additionally store the nurl as identifier
-//		'alias' => $contact["alias"],
-		'location' => $contact["location"],
-		'gender' => $contact["gender"],
-		'about' => $contact["about"],
-		'network' => format_network_name($contact["network"], $contact["url"]),
-		'tags' => $contact["keywords"],
-//		'nsfw' => intval($contact["nsfw"]),
-//		'server_url' => $contact["server_url"],
-		'bd' => (($contact["birthday"] <= '0001-01-01') ? "" : $contact["birthday"]),
-//		'generation' => $contact["generation"],
+		'name'     => $contact['name'],
+		'nick'     => $contact['nick'],
+		'addr'     => defaults($contact, 'addr', $contact['url']),
+		'thumb'    => proxy_url($contact['thumb'], false, PROXY_SIZE_THUMB),
+		'url'      => $cid ? ('redir/' . $cid) : zrl($contact['url']),
+		'nurl'     => $contact['nurl'], // We additionally store the nurl as identifier
+		'location' => $contact['location'],
+		'gender'   => $contact['gender'],
+		'about'    => $contact['about'],
+		'network'  => format_network_name($contact['network'], $contact['url']),
+		'tags'     => $contact['keywords'],
+		'bd'       => $contact['birthday'] <= '0001-01-01' ? '' : $contact['birthday'],
 		'account_type' => Contact::getAccountType($contact),
-		'actions' => $actions,
+		'actions'  => $actions,
 	);
-	if($datatype == "html") {
-		$t = get_markup_template("hovercard.tpl");
-
-		$o = replace_macros($t, array(
+	if ($datatype == 'html') {
+		$tpl = get_markup_template('hovercard.tpl');
+		$o = replace_macros($tpl, array(
 			'$profile' => $profile,
 		));
 
 		return $o;
-
 	} else {
 		json_return_and_die($profile);
 	}
@@ -104,15 +101,15 @@ function hovercard_content() {
  *
  * @return string|bool Output the raw content if existent, otherwise false
  */
-function get_template_content($template, $root = "") {
-
+function get_template_content($template, $root = '')
+{
 	// We load the whole template system to get the filename.
 	// Maybe we can do it a little bit smarter if I get time.
 	$t = get_markup_template($template, $root);
 	$filename = $t->filename;
 
 	// Get the content of the template file
-	if(file_exists($filename)) {
+	if (file_exists($filename)) {
 		$content = file_get_contents($filename);
 
 		return $content;
diff --git a/mod/item.php b/mod/item.php
index 13877fb35..1faef9601 100644
--- a/mod/item.php
+++ b/mod/item.php
@@ -29,7 +29,6 @@ use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\Email;
 use Friendica\Util\Emailer;
 
-require_once 'include/crypto.php';
 require_once 'include/enotify.php';
 require_once 'include/tags.php';
 require_once 'include/files.php';
diff --git a/mod/message.php b/mod/message.php
index eba1c9a62..9e0cb32c0 100644
--- a/mod/message.php
+++ b/mod/message.php
@@ -10,107 +10,104 @@ require_once 'include/acl_selectors.php';
 require_once 'include/message.php';
 require_once 'include/conversation.php';
 
-function message_init(App $a) {
-
+function message_init(App $a)
+{
 	$tabs = '';
 
-	if ($a->argc >1 && is_numeric($a->argv[1])) {
-		$tabs = render_messages(get_messages(local_user(),0,5), 'mail_list.tpl');
+	if ($a->argc > 1 && is_numeric($a->argv[1])) {
+		$tabs = render_messages(get_messages(local_user(), 0, 5), 'mail_list.tpl');
 	}
 
 	$new = array(
 		'label' => t('New Message'),
 		'url' => 'message/new',
-		'sel'=> ($a->argv[1] == 'new'),
+		'sel' => $a->argc > 1 && $a->argv[1] == 'new',
 		'accesskey' => 'm',
 	);
 
 	$tpl = get_markup_template('message_side.tpl');
 	$a->page['aside'] = replace_macros($tpl, array(
-		'$tabs'=>$tabs,
-		'$new'=>$new,
+		'$tabs' => $tabs,
+		'$new' => $new,
 	));
 	$base = System::baseUrl();
 
 	$head_tpl = get_markup_template('message-head.tpl');
-	$a->page['htmlhead'] .= replace_macros($head_tpl,array(
+	$a->page['htmlhead'] .= replace_macros($head_tpl, array(
 		'$baseurl' => System::baseUrl(true),
 		'$base' => $base
 	));
 
 	$end_tpl = get_markup_template('message-end.tpl');
-	$a->page['end'] .= replace_macros($end_tpl,array(
+	$a->page['end'] .= replace_macros($end_tpl, array(
 		'$baseurl' => System::baseUrl(true),
 		'$base' => $base
 	));
-
 }
 
-function message_post(App $a) {
-
-	if (! local_user()) {
-		notice( t('Permission denied.') . EOL);
+function message_post(App $a)
+{
+	if (!local_user()) {
+		notice(t('Permission denied.') . EOL);
 		return;
 	}
 
-	$replyto   = ((x($_REQUEST,'replyto'))   ? notags(trim($_REQUEST['replyto']))   : '');
-	$subject   = ((x($_REQUEST,'subject'))   ? notags(trim($_REQUEST['subject']))   : '');
-	$body      = ((x($_REQUEST,'body'))      ? escape_tags(trim($_REQUEST['body'])) : '');
-	$recipient = ((x($_REQUEST,'messageto')) ? intval($_REQUEST['messageto'])       : 0 );
+	$replyto   = x($_REQUEST, 'replyto')   ? notags(trim($_REQUEST['replyto']))   : '';
+	$subject   = x($_REQUEST, 'subject')   ? notags(trim($_REQUEST['subject']))   : '';
+	$body      = x($_REQUEST, 'body')      ? escape_tags(trim($_REQUEST['body'])) : '';
+	$recipient = x($_REQUEST, 'messageto') ? intval($_REQUEST['messageto'])       : 0;
 
 	$ret = send_message($recipient, $body, $subject, $replyto);
 	$norecip = false;
 
-	switch($ret){
+	switch ($ret) {
 		case -1:
-			notice( t('No recipient selected.') . EOL );
+			notice(t('No recipient selected.') . EOL);
 			$norecip = true;
 			break;
 		case -2:
-			notice( t('Unable to locate contact information.') . EOL );
+			notice(t('Unable to locate contact information.') . EOL);
 			break;
 		case -3:
-			notice( t('Message could not be sent.') . EOL );
+			notice(t('Message could not be sent.') . EOL);
 			break;
 		case -4:
-			notice( t('Message collection failure.') . EOL );
+			notice(t('Message collection failure.') . EOL);
 			break;
 		default:
-			info( t('Message sent.') . EOL );
+			info(t('Message sent.') . EOL);
 	}
 
 	// fake it to go back to the input form if no recipient listed
-
 	if ($norecip) {
 		$a->argc = 2;
 		$a->argv[1] = 'new';
-	} else
+	} else {
 		goaway($_SESSION['return_url']);
-
+	}
 }
 
-function message_content(App $a) {
-
+function message_content(App $a)
+{
 	$o = '';
 	nav_set_selected('messages');
 
-	if (! local_user()) {
-		notice( t('Permission denied.') . EOL);
+	if (!local_user()) {
+		notice(t('Permission denied.') . EOL);
 		return;
 	}
 
-	$myprofile = System::baseUrl().'/profile/' . $a->user['nickname'];
+	$myprofile = System::baseUrl() . '/profile/' . $a->user['nickname'];
 
 	$tpl = get_markup_template('mail_head.tpl');
 	$header = replace_macros($tpl, array(
 		'$messages' => t('Messages'),
-		'$tab_content' => $tab_content
 	));
 
-
 	if (($a->argc == 3) && ($a->argv[1] === 'drop' || $a->argv[1] === 'dropconv')) {
-		if (! intval($a->argv[2]))
+		if (!intval($a->argv[2])) {
 			return;
+		}
 
 		// Check if we should do HTML-based delete confirmation
 		if ($_REQUEST['confirm']) {
@@ -118,7 +115,7 @@ function message_content(App $a) {
 			// so add any arguments as hidden inputs
 			$query = explode_querystring($a->query_string);
 			$inputs = array();
-			foreach($query['args'] as $arg) {
+			foreach ($query['args'] as $arg) {
 				if (strpos($arg, 'confirm=') === false) {
 					$arg_parts = explode('=', $arg);
 					$inputs[] = array('name' => $arg_parts[0], 'value' => $arg_parts[1]);
@@ -148,7 +145,7 @@ function message_content(App $a) {
 				intval(local_user())
 			);
 			if ($r) {
-				info( t('Message deleted.') . EOL );
+				info(t('Message deleted.') . EOL);
 			}
 			//goaway(System::baseUrl(true) . '/message' );
 			goaway($_SESSION['return_url']);
@@ -170,24 +167,22 @@ function message_content(App $a) {
 				// Actually if we do this, we can never receive another reply to that conversation,
 				// as we will never again have the info we need to re-create it.
 				// We'll just have to orphan it.
-
 				//if ($convid) {
 				//	q("delete from conv where id = %d limit 1",
 				//		intval($convid)
 				//	);
 				//}
 
-				if ($r)
-					info( t('Conversation removed.') . EOL );
+				if ($r) {
+					info(t('Conversation removed.') . EOL);
+				}
 			}
 			//goaway(System::baseUrl(true) . '/message' );
 			goaway($_SESSION['return_url']);
 		}
-
 	}
 
 	if (($a->argc > 1) && ($a->argv[1] === 'new')) {
-
 		$o .= $header;
 
 		$tpl = get_markup_template('msg-header.tpl');
@@ -204,8 +199,7 @@ function message_content(App $a) {
 			'$linkurl' => t('Please enter a link URL:')
 		));
 
-		$preselect = (isset($a->argv[2])?array($a->argv[2]):false);
-
+		$preselect = isset($a->argv[2]) ? array($a->argv[2]) : false;
 
 		$prename = $preurl = $preid = '';
 
@@ -233,18 +227,18 @@ function message_content(App $a) {
 				$preurl = $r[0]['url'];
 				$preid = $r[0]['id'];
 				$preselect = array($preid);
-			} else
+			} else {
 				$preselect = false;
+			}
 		}
 
-		$prefill = (($preselect) ? $prename  : '');
+		$prefill = $preselect ? $prename : '';
 
 		// the ugly select box
-
-		$select = contact_select('messageto','message-to-select', $preselect, 4, true, false, false, 10);
+		$select = contact_select('messageto', 'message-to-select', $preselect, 4, true, false, false, 10);
 
 		$tpl = get_markup_template('prv_message.tpl');
-		$o .= replace_macros($tpl,array(
+		$o .= replace_macros($tpl, array(
 			'$header' => t('Send Private Message'),
 			'$to' => t('To:'),
 			'$showinputs' => 'true',
@@ -252,8 +246,8 @@ function message_content(App $a) {
 			'$autocomp' => $autocomp,
 			'$preid' => $preid,
 			'$subject' => t('Subject:'),
-			'$subjtxt' => ((x($_REQUEST,'subject')) ? strip_tags($_REQUEST['subject']) : ''),
-			'$text' => ((x($_REQUEST,'body')) ? escape_tags(htmlspecialchars($_REQUEST['body'])) : ''),
+			'$subjtxt' => x($_REQUEST, 'subject') ? strip_tags($_REQUEST['subject']) : '',
+			'$text' => x($_REQUEST, 'body') ? escape_tags(htmlspecialchars($_REQUEST['body'])) : '',
 			'$readonly' => '',
 			'$yourmessage' => t('Your message:'),
 			'$select' => $select,
@@ -286,8 +280,8 @@ function message_content(App $a) {
 
 		$r = get_messages(local_user(), $a->pager['start'], $a->pager['itemspage']);
 
-		if (! DBM::is_result($r)) {
-			info( t('No messages.') . EOL);
+		if (!DBM::is_result($r)) {
+			info(t('No messages.') . EOL);
 			return $o;
 		}
 
@@ -325,8 +319,8 @@ function message_content(App $a) {
 				intval(local_user())
 			);
 		}
-		if (! count($messages)) {
-			notice( t('Message not available.') . EOL );
+		if (!count($messages)) {
+			notice(t('Message not available.') . EOL);
 			return $o;
 		}
 
@@ -355,24 +349,24 @@ function message_content(App $a) {
 		$seen = 0;
 		$unknown = false;
 
-		foreach($messages as $message) {
+		foreach ($messages as $message) {
 			if ($message['unknown'])
 				$unknown = true;
 			if ($message['from-url'] == $myprofile) {
 				$from_url = $myprofile;
 				$sparkle = '';
 			} elseif ($message['contact-id'] != 0) {
-				$from_url = 'redir/'.$message['contact-id'];
+				$from_url = 'redir/' . $message['contact-id'];
 				$sparkle = ' sparkle';
 			} else {
-				$from_url = $message['from-url']."?zrl=".urlencode($myprofile);
+				$from_url = $message['from-url'] . "?zrl=" . urlencode($myprofile);
 				$sparkle = ' sparkle';
 			}
 
-
 			$extracted = item_extract_images($message['body']);
-			if ($extracted['images'])
+			if ($extracted['images']) {
 				$message['body'] = item_redir_and_replace_images($extracted['body'], $extracted['images'], $message['contact-id']);
+			}
 
 			$from_name_e = $message['from-name'];
 			$subject_e = $message['title'];
@@ -380,10 +374,11 @@ function message_content(App $a) {
 			$to_name_e = $message['name'];
 
 			$contact = Contact::getDetailsByURL($message['from-url']);
-			if (isset($contact["thumb"]))
+			if (isset($contact["thumb"])) {
 				$from_photo = $contact["thumb"];
-			else
+			} else {
 				$from_photo = $message['from-photo'];
+			}
 
 			$mails[] = array(
 				'id' => $message['id'],
@@ -396,26 +391,22 @@ function message_content(App $a) {
 				'body' => $body_e,
 				'delete' => t('Delete message'),
 				'to_name' => $to_name_e,
-				'date' => datetime_convert('UTC',date_default_timezone_get(),$message['created'],'D, d M Y - g:i A'),
-                                'ago' => relative_date($message['created']),
+				'date' => datetime_convert('UTC', date_default_timezone_get(), $message['created'], 'D, d M Y - g:i A'),
+				'ago' => relative_date($message['created']),
 			);
 
 			$seen = $message['seen'];
 		}
 
-
 		$select = $message['name'] . '<input type="hidden" name="messageto" value="' . $contact_id . '" />';
 		$parent = '<input type="hidden" name="replyto" value="' . $message['parent-uri'] . '" />';
 
 		$tpl = get_markup_template('mail_display.tpl');
-
-		$subjtxt_e = $message['title'];
-
 		$o = replace_macros($tpl, array(
 			'$thread_id' => $a->argv[1],
 			'$thread_subject' => $message['title'],
 			'$thread_seen' => $seen,
-			'$delete' =>  t('Delete conversation'),
+			'$delete' => t('Delete conversation'),
 			'$canreply' => (($unknown) ? false : '1'),
 			'$unknown_text' => t("No secure communications available. You <strong>may</strong> be able to respond from the sender's profile page."),
 			'$mails' => $mails,
@@ -425,7 +416,7 @@ function message_content(App $a) {
 			'$to' => t('To:'),
 			'$showinputs' => '',
 			'$subject' => t('Subject:'),
-			'$subjtxt' => $subjtxt_e,
+			'$subjtxt' => $message['title'],
 			'$readonly' => ' readonly="readonly" style="background: #BBBBBB;" ',
 			'$yourmessage' => t('Your message:'),
 			'$text' => '',
@@ -435,14 +426,14 @@ function message_content(App $a) {
 			'$insert' => t('Insert web link'),
 			'$submit' => t('Submit'),
 			'$wait' => t('Please wait')
-
 		));
 
 		return $o;
 	}
 }
 
-function get_messages($user, $lstart, $lend) {
+function get_messages($user, $lstart, $lend)
+{
 	//TODO: rewritte with a sub-query to get the first message of each private thread with certainty
 	return q("SELECT max(`mail`.`created`) AS `mailcreated`, min(`mail`.`seen`) AS `mailseen`,
 		ANY_VALUE(`mail`.`id`) AS `id`, ANY_VALUE(`mail`.`uid`) AS `uid`, ANY_VALUE(`mail`.`guid`) AS `guid`,
@@ -461,33 +452,34 @@ function get_messages($user, $lstart, $lend) {
 	);
 }
 
-function render_messages(array $msg, $t) {
-
+function render_messages(array $msg, $t)
+{
 	$a = get_app();
 
 	$tpl = get_markup_template($t);
 	$rslt = '';
 
-	$myprofile = System::baseUrl().'/profile/' . $a->user['nickname'];
+	$myprofile = System::baseUrl() . '/profile/' . $a->user['nickname'];
 
-	foreach($msg as $rr) {
-
-		if ($rr['unknown'])
-			$participants = sprintf( t("Unknown sender - %s"),$rr['from-name']);
-		elseif (link_compare($rr['from-url'], $myprofile))
-			$participants = sprintf( t("You and %s"), $rr['name']);
-		else
-			$participants = sprintf(t("%s and You"), $rr['from-name']);
+	foreach ($msg as $rr) {
+		if ($rr['unknown']) {
+			$participants = t("Unknown sender - %s", $rr['from-name']);
+		} elseif (link_compare($rr['from-url'], $myprofile)) {
+			$participants = t("You and %s", $rr['name']);
+		} else {
+			$participants = t("%s and You", $rr['from-name']);
+		}
 
 		$subject_e = (($rr['mailseen']) ? $rr['title'] : '<strong>' . $rr['title'] . '</strong>');
 		$body_e = $rr['body'];
 		$to_name_e = $rr['name'];
 
 		$contact = Contact::getDetailsByURL($rr['url']);
-		if (isset($contact["thumb"]))
+		if (isset($contact["thumb"])) {
 			$from_photo = $contact["thumb"];
-		else
+		} else {
 			$from_photo = (($rr['thumb']) ? $rr['thumb'] : $rr['from-photo']);
+		}
 
 		$rslt .= replace_macros($tpl, array(
 			'$id' => $rr['id'],
@@ -500,10 +492,10 @@ function render_messages(array $msg, $t) {
 			'$delete' => t('Delete conversation'),
 			'$body' => $body_e,
 			'$to_name' => $to_name_e,
-			'$date' => datetime_convert('UTC',date_default_timezone_get(),$rr['mailcreated'], t('D, d M Y - g:i A')),
-															'$ago' => relative_date($rr['mailcreated']),
+			'$date' => datetime_convert('UTC', date_default_timezone_get(), $rr['mailcreated'], t('D, d M Y - g:i A')),
+			'$ago' => relative_date($rr['mailcreated']),
 			'$seen' => $rr['mailseen'],
-			'$count' => sprintf( tt('%d message', '%d messages', $rr['count']), $rr['count']),
+			'$count' => tt('%d message', '%d messages', $rr['count']),
 		));
 	}
 
diff --git a/mod/network.php b/mod/network.php
index 1933c3d1e..65b15cb03 100644
--- a/mod/network.php
+++ b/mod/network.php
@@ -366,7 +366,7 @@ function networkConversation($a, $items, $mode, $update) {
 	// Set this so that the conversation function can find out contact info for our wall-wall items
 	$a->page_contact = $a->contact;
 
-	$o .= conversation($a, $items, $mode, $update);
+	$o = conversation($a, $items, $mode, $update);
 
 	if (!$update) {
 		if (PConfig::get(local_user(), 'system', 'infinite_scroll')) {
@@ -568,9 +568,9 @@ function networkThreadedView(App $a, $update = 0) {
 
 		if ($group) {
 			if (($t = Contact::getOStatusCountByGroupId($group)) && !PConfig::get(local_user(), 'system', 'nowarn_insecure')) {
-				notice(sprintf(tt("Warning: This group contains %s member from a network that doesn't allow non public messages.",
+				notice(tt("Warning: This group contains %s member from a network that doesn't allow non public messages.",
 						"Warning: This group contains %s members from a network that doesn't allow non public messages.",
-						$t), $t).EOL);
+						$t) . EOL);
 				notice(t("Messages in this group won't be send to these receivers.").EOL);
 			}
 		}
@@ -664,7 +664,7 @@ function networkThreadedView(App $a, $update = 0) {
 		}
 
 		$o = replace_macros(get_markup_template("section_title.tpl"),array(
-			'$title' => sprintf(t('Group: %s'), $r['name'])
+			'$title' => t('Group: %s', $r['name'])
 		)) . $o;
 
 	} elseif ($cid) {
@@ -716,13 +716,6 @@ function networkThreadedView(App $a, $update = 0) {
 	$sql_order = "";
 	$order_mode = "received";
 
-	if (strlen($file)) {
-		$sql_post_table .= sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
-				dbesc(protect_sprintf($file)), intval(TERM_OBJ_POST), intval(TERM_FILE), intval(local_user()));
-		$sql_order = "`item`.`id`";
-		$order_mode = "id";
-	}
-
 	if ($conv) {
 		$sql_extra3 .= " AND $sql_table.`mention`";
 	}
@@ -744,7 +737,7 @@ function networkThreadedView(App $a, $update = 0) {
 		$sql_order = "$sql_table.$ordering";
 	}
 
-	if (($_GET["offset"] != "")) {
+	if (x($_GET, 'offset')) {
 		$sql_extra3 .= sprintf(" AND $sql_order <= '%s'", dbesc($_GET["offset"]));
 	}
 
@@ -816,9 +809,10 @@ function networkThreadedView(App $a, $update = 0) {
 	$parents_str = '';
 	$date_offset = "";
 
+	$items = array();
 	if (DBM::is_result($r)) {
 		foreach ($r as $rr) {
-			if (!in_array($rr['item_id'],$parents_arr)) {
+			if (!in_array($rr['item_id'], $parents_arr)) {
 				$parents_arr[] = $rr['item_id'];
 			}
 		}
@@ -833,12 +827,10 @@ function networkThreadedView(App $a, $update = 0) {
 			$max_comments = 100;
 		}
 
-		$items = array();
-
 		foreach ($parents_arr AS $parents) {
-			$thread_items = dba::p(item_query()." AND `item`.`uid` = ?
+			$thread_items = dba::p(item_query() . " AND `item`.`uid` = ?
 				AND `item`.`parent` = ?
-				ORDER BY `item`.`commented` DESC LIMIT ".intval($max_comments + 1),
+				ORDER BY `item`.`commented` DESC LIMIT " . intval($max_comments + 1),
 				local_user(),
 				$parents
 			);
@@ -847,15 +839,15 @@ function networkThreadedView(App $a, $update = 0) {
 				$items = array_merge($items, dba::inArray($thread_items));
 			}
 		}
-		$items = conv_sort($items,$ordering);
-	} else {
-		$items = array();
+		$items = conv_sort($items, $ordering);
 	}
 
-	if ($_GET["offset"] == "") {
+	if (x($_GET, 'offset')) {
+		$date_offset = $_GET["offset"];
+	} elseif(count($items)) {
 		$date_offset = $items[0][$order_mode];
 	} else {
-		$date_offset = $_GET["offset"];
+		$date_offset = '';
 	}
 
 	$a->page_offset = $date_offset;
diff --git a/mod/nogroup.php b/mod/nogroup.php
index d80b6d3db..9f5425d9e 100644
--- a/mod/nogroup.php
+++ b/mod/nogroup.php
@@ -41,28 +41,25 @@ function nogroup_content(App $a)
 			$contact_details = Contact::getDetailsByURL($rr['url'], local_user(), $rr);
 
 			$contacts[] = array(
-				'img_hover' => sprintf(t('Visit %s\'s profile [%s]'), $contact_details['name'], $rr['url']),
+				'img_hover' => t('Visit %s\'s profile [%s]', $contact_details['name'], $rr['url']),
 				'edit_hover' => t('Edit contact'),
 				'photo_menu' => Contact::photoMenu($rr),
 				'id' => $rr['id'],
-				'alt_text' => $alt_text,
-				'dir_icon' => $dir_icon,
 				'thumb' => proxy_url($contact_details['thumb'], false, PROXY_SIZE_THUMB),
 				'name' => $contact_details['name'],
 				'username' => $contact_details['name'],
 				'details'       => $contact_details['location'],
 				'tags'          => $contact_details['keywords'],
 				'about'         => $contact_details['about'],
-				'sparkle' => $sparkle,
 				'itemurl' => (($contact_details['addr'] != "") ? $contact_details['addr'] : $rr['url']),
 				'url' => $rr['url'],
-				'network' => network_to_name($rr['network'], $url),
+				'network' => network_to_name($rr['network'], $rr['url']),
 			);
 		}
 	}
 
 	$tpl = get_markup_template("nogroup-template.tpl");
-	$o .= replace_macros(
+	$o = replace_macros(
 		$tpl,
 		array(
 		'$header' => t('Contacts who are not members of a group'),
diff --git a/mod/oembed.php b/mod/oembed.php
deleted file mode 100644
index 3266ad963..000000000
--- a/mod/oembed.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-use Friendica\App;
-
-require_once("include/oembed.php");
-
-function oembed_content(App $a) {
-	// logger('mod_oembed ' . $a->query_string, LOGGER_ALL);
-
-	if ($a->argv[1]=='b2h'){
-		$url = array( "", trim(hex2bin($_REQUEST['url'])));
-		echo oembed_replacecb($url);
-		killme();
-	}
-
-	if ($a->argv[1]=='h2b'){
-		$text = trim(hex2bin($_REQUEST['text']));
-		echo oembed_html2bbcode($text);
-		killme();
-	}
-
-	if ($a->argc == 2){
-		echo "<html><body>";
-		$url = base64url_decode($a->argv[1]);
-		$j = oembed_fetch_url($url);
-
-		// workaround for media.ccc.de (and any other endpoint that return size 0)
-		if (substr($j->html, 0, 7) == "<iframe" && strstr($j->html, 'width="0"')) {
-			$j->html = '<style>html,body{margin:0;padding:0;} iframe{width:100%;height:100%;}</style>'. $j->html;
-			$j->html = str_replace('width="0"', '', $j->html);
-			$j->html = str_replace('height="0"', '', $j->html);
-		}
-		echo $j->html;
-//		logger('mod-oembed ' . $j->html, LOGGER_ALL);
-		echo "</body></html>";
-	}
-	killme();
-}
diff --git a/mod/photo.php b/mod/photo.php
index 243dfda02..dc7d85678 100644
--- a/mod/photo.php
+++ b/mod/photo.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file mod/photo.php
  */
@@ -8,7 +9,8 @@ use Friendica\Object\Image;
 
 require_once 'include/security.php';
 
-function photo_init(App $a) {
+function photo_init(App $a)
+{
 	global $_SERVER;
 
 	$prvcachecontrol = false;
@@ -37,8 +39,8 @@ function photo_init(App $a) {
 	if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
 		header('HTTP/1.1 304 Not Modified');
 		header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
-		header('Etag: '.$_SERVER['HTTP_IF_NONE_MATCH']);
-	 	header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
+		header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
+		header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 		header("Cache-Control: max-age=31536000");
 		if (function_exists('header_remove')) {
 			header_remove('Last-Modified');
@@ -49,15 +51,11 @@ function photo_init(App $a) {
 	}
 
 	$default = 'images/person-175.jpg';
+	$public = true;
 
 	if (isset($type)) {
-
-		/**
-		 * Profile photos
-		 */
-
+		// Profile photos
 		switch ($type) {
-
 			case 'profile':
 			case 'custom':
 				$resolution = 4;
@@ -76,7 +74,7 @@ function photo_init(App $a) {
 		$uid = str_replace(array('.jpg', '.png', '.gif'), array('', '', ''), $person);
 
 		foreach (Image::supportedTypes() AS $m => $e) {
-			$uid = str_replace('.'.$e, '', $uid);
+			$uid = str_replace('.' . $e, '', $uid);
 		}
 
 		$r = q("SELECT * FROM `photo` WHERE `scale` = %d AND `uid` = %d AND `profile` = 1 LIMIT 1",
@@ -92,16 +90,12 @@ function photo_init(App $a) {
 			$mimetype = 'image/jpeg';
 		}
 	} else {
-
-		/**
-		 * Other photos
-		 */
-
+		// Other photos
 		$resolution = 0;
 		$photo = str_replace(array('.jpg', '.png', '.gif'), array('', '', ''), $photo);
 
 		foreach (Image::supportedTypes() AS $m => $e) {
-			$photo = str_replace('.'.$e, '', $photo);
+			$photo = str_replace('.' . $e, '', $photo);
 		}
 
 		if (substr($photo, -2, 1) == '-') {
@@ -115,22 +109,18 @@ function photo_init(App $a) {
 			intval($resolution)
 		);
 		if (DBM::is_result($r)) {
-
 			$sql_extra = permissions_sql($r[0]['uid']);
 
 			// Now we'll see if we can access the photo
-
 			$r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` <= %d $sql_extra ORDER BY scale DESC LIMIT 1",
 				dbesc($photo),
 				intval($resolution)
 			);
-
-			$public = (DBM::is_result($r)) && ($r[0]['allow_cid'] == '') && ($r[0]['allow_gid'] == '') && ($r[0]['deny_cid']  == '') && ($r[0]['deny_gid']  == '');
-
 			if (DBM::is_result($r)) {
 				$resolution = $r[0]['scale'];
 				$data = $r[0]['data'];
 				$mimetype = $r[0]['type'];
+				$public = $r[0]['allow_cid'] == '' && $r[0]['allow_gid'] == '' && $r[0]['deny_cid'] == '' && $r[0]['deny_gid'] == '';
 			} else {
 				// The picure exists. We already checked with the first query.
 				// obviously, this is not an authorized viev!
@@ -145,7 +135,6 @@ function photo_init(App $a) {
 	if (empty($data)) {
 		if (isset($resolution)) {
 			switch ($resolution) {
-
 				case 4:
 					$data = file_get_contents('images/person-175.jpg');
 					$mimetype = 'image/jpeg';
@@ -167,7 +156,7 @@ function photo_init(App $a) {
 	}
 
 	// Resize only if its not a GIF and it is supported by the library
-	if (($mimetype != "image/gif") && in_array($mimetype, Image::supportedTypes())) {
+	if ($mimetype != "image/gif" && in_array($mimetype, Image::supportedTypes())) {
 		$Image = new Image($data, $mimetype);
 		if ($Image->isValid()) {
 			if (isset($customres) && $customres > 0 && $customres < 500) {
@@ -183,36 +172,33 @@ function photo_init(App $a) {
 		header_remove('pragma');
 	}
 
-	header("Content-type: ".$mimetype);
+	header("Content-type: " . $mimetype);
 
 	if ($prvcachecontrol) {
-
 		// it is a private photo that they have no permission to view.
 		// tell the browser not to cache it, in case they authenticate
 		// and subsequently have permission to see it
-
 		header("Cache-Control: no-store, no-cache, must-revalidate");
-
 	} else {
 		header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
-		header('Etag: "'.md5($data).'"');
-	 	header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
+		header('Etag: "' . md5($data) . '"');
+		header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 		header("Cache-Control: max-age=31536000");
 	}
 	echo $data;
 
 	// If the photo is public and there is an existing photo directory store the photo there
-	if ($public and ($file != "")) {
+	if ($public and $file != '') {
 		// If the photo path isn't there, try to create it
 		$basepath = $a->get_basepath();
-		if (!is_dir($basepath."/photo")) {
+		if (!is_dir($basepath . "/photo")) {
 			if (is_writable($basepath)) {
-				mkdir($basepath."/photo");
+				mkdir($basepath . "/photo");
 			}
 		}
 
-		if (is_dir($basepath."/photo")) {
-			file_put_contents($basepath."/photo/".$file, $data);
+		if (is_dir($basepath . "/photo")) {
+			file_put_contents($basepath . "/photo/" . $file, $data);
 		}
 	}
 
diff --git a/mod/photos.php b/mod/photos.php
index 68b9752b5..460deba25 100644
--- a/mod/photos.php
+++ b/mod/photos.php
@@ -55,12 +55,12 @@ function photos_init(App $a) {
 
 		$tpl = get_markup_template("vcard-widget.tpl");
 
-		$vcard_widget .= replace_macros($tpl, array(
+		$vcard_widget = replace_macros($tpl, array(
 			'$name' => $profile['name'],
 			'$photo' => $profile['photo'],
-			'$addr' => (($profile['addr'] != "") ? $profile['addr'] : ""),
+			'$addr' => defaults($profile, 'addr', ''),
 			'$account_type' => $account_type,
-			'$pdesc' => (($profile['pdesc'] != "") ? $profile['pdesc'] : ""),
+			'$pdesc' => defaults($profile, 'pdesc', ''),
 		));
 
 		$albums = photo_albums($a->data['user']['uid']);
@@ -92,18 +92,16 @@ function photos_init(App $a) {
 			}
 		}
 
-		$albums = $ret;
-
 		if (local_user() && $a->data['user']['uid'] == local_user()) {
 			$can_post = true;
 		}
 
-		if ($albums['success']) {
+		if ($ret['success']) {
 			$photo_albums_widget = replace_macros(get_markup_template('photo_albums.tpl'), array(
 				'$nick'     => $a->data['user']['nickname'],
 				'$title'    => t('Photo Albums'),
 				'$recent'   => t('Recent Photos'),
-				'$albums'   => $albums['albums'],
+				'$albums'   => $ret['albums'],
 				'$baseurl'  => System::baseUrl(),
 				'$upload'   => array(t('Upload New Photos'), 'photos/' . $a->data['user']['nickname'] . '/upload'),
 				'$can_post' => $can_post
@@ -117,26 +115,20 @@ function photos_init(App $a) {
 		$a->page['aside'] .= $vcard_widget;
 		$a->page['aside'] .= $photo_albums_widget;
 
-
 		$tpl = get_markup_template("photos_head.tpl");
 		$a->page['htmlhead'] .= replace_macros($tpl,array(
 			'$ispublic' => t('everybody')
 		));
-
 	}
 
 	return;
 }
 
-
-
-function photos_post(App $a) {
-
+function photos_post(App $a)
+{
 	logger('mod-photos: photos_post: begin' , LOGGER_DEBUG);
-
-
-	logger('mod_photos: REQUEST ' . print_r($_REQUEST,true), LOGGER_DATA);
-	logger('mod_photos: FILES '   . print_r($_FILES,true), LOGGER_DATA);
+	logger('mod_photos: REQUEST ' . print_r($_REQUEST, true), LOGGER_DATA);
+	logger('mod_photos: FILES '   . print_r($_FILES, true), LOGGER_DATA);
 
 	$phototypes = Image::supportedTypes();
 
@@ -144,14 +136,14 @@ function photos_post(App $a) {
 	$visitor   = 0;
 
 	$page_owner_uid = $a->data['user']['uid'];
-	$community_page = (($a->data['user']['page-flags'] == PAGE_COMMUNITY) ? true : false);
+	$community_page = $a->data['user']['page-flags'] == PAGE_COMMUNITY;
 
 	if (local_user() && (local_user() == $page_owner_uid)) {
 		$can_post = true;
 	} else {
 		if ($community_page && remote_user()) {
 			$contact_id = 0;
-			if (is_array($_SESSION['remote'])) {
+			if (x($_SESSION, 'remote') && is_array($_SESSION['remote'])) {
 				foreach ($_SESSION['remote'] as $v) {
 					if ($v['uid'] == $page_owner_uid) {
 						$contact_id = $v['cid'];
@@ -160,7 +152,6 @@ function photos_post(App $a) {
 				}
 			}
 			if ($contact_id) {
-
 				$r = q("SELECT `uid` FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `id` = %d AND `uid` = %d LIMIT 1",
 					intval($contact_id),
 					intval($page_owner_uid)
@@ -191,8 +182,7 @@ function photos_post(App $a) {
 
 	$owner_record = $r[0];
 
-
-	if (($a->argc > 3) && ($a->argv[2] === 'album')) {
+	if ($a->argc > 3 && $a->argv[2] === 'album') {
 		$album = hex2bin($a->argv[3]);
 
 		if ($album === t('Profile Photos') || $album === 'Contact Photos' || $album === t('Contact Photos')) {
@@ -215,10 +205,7 @@ function photos_post(App $a) {
 			goaway($_SESSION['photo_return']);
 		}
 
-		/*
-		 * RENAME photo album
-		 */
-
+		// RENAME photo album
 		$newalbum = notags(trim($_POST['albumname']));
 		if ($newalbum != $album) {
 			q("UPDATE `photo` SET `album` = '%s' WHERE `album` = '%s' AND `uid` = %d",
@@ -229,7 +216,7 @@ function photos_post(App $a) {
 			// Update the photo albums cache
 			photo_albums($page_owner_uid, true);
 
-			$newurl = str_replace(bin2hex($album),bin2hex($newalbum),$_SESSION['photo_return']);
+			$newurl = str_replace(bin2hex($album), bin2hex($newalbum), $_SESSION['photo_return']);
 			goaway($newurl);
 			return; // NOTREACHED
 		}
@@ -239,9 +226,8 @@ function photos_post(App $a) {
 		 */
 
 		if ($_POST['dropalbum'] == t('Delete Album')) {
-
 			// Check if we should do HTML-based delete confirmation
-			if ($_REQUEST['confirm']) {
+			if (x($_REQUEST, 'confirm')) {
 				$drop_url = $a->query_string;
 				$extra_inputs = array(
 					array('name' => 'albumname', 'value' => $_POST['albumname']),
@@ -287,14 +273,12 @@ function photos_post(App $a) {
 			$str_res = implode(',', $res);
 
 			// remove the associated photos
-
 			q("DELETE FROM `photo` WHERE `resource-id` IN ( $str_res ) AND `uid` = %d",
 				intval($page_owner_uid)
 			);
 
 			// find and delete the corresponding item with all the comments and likes/dislikes
-
-			$r = q("SELECT `parent-uri` FROM `item` WHERE `resource-id` IN ( $str_res ) AND `uid` = %d",
+			$r = q("SELECT `id`, `parent-uri`, `visible` FROM `item` WHERE `resource-id` IN ( $str_res ) AND `uid` = %d",
 				intval($page_owner_uid)
 			);
 			if (DBM::is_result($r)) {
@@ -310,7 +294,6 @@ function photos_post(App $a) {
 					$drop_id = intval($rr['id']);
 
 					// send the notification upstream/downstream as the case may be
-
 					if ($rr['visible']) {
 						Worker::add(PRIORITY_HIGH, "Notifier", "drop", $drop_id);
 					}
@@ -327,16 +310,16 @@ function photos_post(App $a) {
 
 
 	// Check if the user has responded to a delete confirmation query for a single photo
-	if (($a->argc > 2) && $_REQUEST['canceled']) {
+	if ($a->argc > 2 && x($_REQUEST, 'canceled')) {
 		goaway($_SESSION['photo_return']);
 	}
 
-	if (($a->argc > 2) && (x($_POST,'delete')) && ($_POST['delete'] == t('Delete Photo'))) {
+	if ($a->argc > 2 && defaults($_POST, 'delete', '') === t('Delete Photo')) {
 
 		// same as above but remove single photo
 
 		// Check if we should do HTML-based delete confirmation
-		if ($_REQUEST['confirm']) {
+		if (x($_REQUEST, 'confirm')) {
 			$drop_url = $a->query_string;
 			$a->page['content'] = replace_macros(get_markup_template('confirm.tpl'), array(
 				'$method' => 'post',
@@ -368,7 +351,7 @@ function photos_post(App $a) {
 				intval($page_owner_uid),
 				dbesc($r[0]['resource-id'])
 			);
-			$i = q("SELECT * FROM `item` WHERE `resource-id` = '%s' AND `uid` = %d LIMIT 1",
+			$i = q("SELECT `id`, `uri`, `visible` FROM `item` WHERE `resource-id` = '%s' AND `uid` = %d LIMIT 1",
 				dbesc($r[0]['resource-id']),
 				intval($page_owner_uid)
 			);
@@ -398,13 +381,12 @@ function photos_post(App $a) {
 		return; // NOTREACHED
 	}
 
-	if (($a->argc > 2) && ((x($_POST,'desc') !== false) || (x($_POST,'newtag') !== false)) || (x($_POST,'albname') !== false)) {
-
-		$desc        = (x($_POST,'desc')      ? notags(trim($_POST['desc']))    : '');
-		$rawtags     = (x($_POST,'newtag')    ? notags(trim($_POST['newtag']))  : '');
-		$item_id     = (x($_POST,'item_id')   ? intval($_POST['item_id'])       : 0);
-		$albname     = (x($_POST,'albname')   ? notags(trim($_POST['albname'])) : '');
-		$origaname   = (x($_POST,'origaname') ? notags(trim($_POST['origaname'])) : '');
+	if ($a->argc > 2 && (x($_POST, 'desc') !== false || x($_POST, 'newtag') !== false || x($_POST, 'albname') !== false)) {
+		$desc        = x($_POST, 'desc')      ? notags(trim($_POST['desc']))      : '';
+		$rawtags     = x($_POST, 'newtag')    ? notags(trim($_POST['newtag']))    : '';
+		$item_id     = x($_POST, 'item_id')   ? intval($_POST['item_id'])         : 0;
+		$albname     = x($_POST, 'albname')   ? notags(trim($_POST['albname']))   : '';
+		$origaname   = x($_POST, 'origaname') ? notags(trim($_POST['origaname'])) : '';
 		$str_group_allow   = perms2str($_POST['group_allow']);
 		$str_contact_allow = perms2str($_POST['contact_allow']);
 		$str_group_deny    = perms2str($_POST['group_deny']);
@@ -416,9 +398,8 @@ function photos_post(App $a) {
 			$albname = datetime_convert('UTC',date_default_timezone_get(),'now', 'Y');
 		}
 
-
-		if ((x($_POST,'rotate') !== false) &&
-		   ( (intval($_POST['rotate']) == 1) || (intval($_POST['rotate']) == 2) )) {
+		if (x($_POST,'rotate') !== false &&
+		   (intval($_POST['rotate']) == 1 || intval($_POST['rotate']) == 2)) {
 			logger('rotate');
 
 			$r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `uid` = %d AND `scale` = 0 LIMIT 1",
@@ -504,9 +485,7 @@ function photos_post(App $a) {
 		}
 
 		if (!$item_id) {
-
 			// Create item container
-
 			$title = '';
 			$uri = item_new_uri($a->get_hostname(),$page_owner_uid);
 
@@ -539,7 +518,6 @@ function photos_post(App $a) {
 						. '[/url]';
 
 			$item_id = item_store($arr);
-
 		}
 
 		if ($item_id) {
@@ -554,13 +532,11 @@ function photos_post(App $a) {
 		}
 
 		if (strlen($rawtags)) {
-
 			$str_tags = '';
 			$inform   = '';
 
 			// if the new tag doesn't have a namespace specifier (@foo or #foo) give it a hashtag
-
-			$x = substr($rawtags,0,1);
+			$x = substr($rawtags, 0, 1);
 			if ($x !== '@' && $x !== '#') {
 				$rawtags = '#' . $rawtags;
 			}
@@ -570,10 +546,8 @@ function photos_post(App $a) {
 
 			if (count($tags)) {
 				foreach ($tags as $tag) {
-					if (isset($profile)) {
-						unset($profile);
-					}
 					if (strpos($tag, '@') === 0) {
+						$profile = '';
 						$name = substr($tag,1);
 						if ((strpos($name, '@')) || (strpos($name, 'http://'))) {
 							$newname = $name;
@@ -691,8 +665,7 @@ function photos_post(App $a) {
 
 			if (count($taginfo)) {
 				foreach ($taginfo as $tagged) {
-
-					$uri = item_new_uri($a->get_hostname(),$page_owner_uid);
+					$uri = item_new_uri($a->get_hostname(), $page_owner_uid);
 
 					$arr = array();
 					$arr['guid']          = get_guid(32);
@@ -747,18 +720,12 @@ function photos_post(App $a) {
 	}
 
 
-	/**
-	 * default post action - upload a photo
-	 */
-
+	// default post action - upload a photo
 	call_hooks('photo_post_init', $_POST);
 
-	/**
-	 * Determine the album to use
-	 */
-
-	$album    = notags(trim($_REQUEST['album']));
-	$newalbum = notags(trim($_REQUEST['newalbum']));
+	// Determine the album to use
+	$album    = x($_REQUEST, 'album') ? notags(trim($_REQUEST['album'])) : '';
+	$newalbum = x($_REQUEST, 'newalbum') ? notags(trim($_REQUEST['newalbum'])) : '';
 
 	logger('mod/photos.php: photos_post(): album= ' . $album . ' newalbum= ' . $newalbum , LOGGER_DEBUG);
 
@@ -788,51 +755,85 @@ function photos_post(App $a) {
 		$visible = 0;
 	}
 
-	if (intval($_REQUEST['not_visible']) || $_REQUEST['not_visible'] === 'true') {
+	if (x($_REQUEST, 'not_visible') && $_REQUEST['not_visible'] !== 'false') {
 		$visible = 0;
 	}
 
-	$str_group_allow   = perms2str((is_array($_REQUEST['group_allow'])   ? $_REQUEST['group_allow']   : explode(',', $_REQUEST['group_allow'])));
-	$str_contact_allow = perms2str((is_array($_REQUEST['contact_allow']) ? $_REQUEST['contact_allow'] : explode(',', $_REQUEST['contact_allow'])));
-	$str_group_deny    = perms2str((is_array($_REQUEST['group_deny'])    ? $_REQUEST['group_deny']    : explode(',', $_REQUEST['group_deny'])));
-	$str_contact_deny  = perms2str((is_array($_REQUEST['contact_deny'])  ? $_REQUEST['contact_deny']  : explode(',', $_REQUEST['contact_deny'])));
+	$group_allow   = defaults($_REQUEST, 'group_allow'  , []);
+	$contact_allow = defaults($_REQUEST, 'contact_allow', []);
+	$group_deny    = defaults($_REQUEST, 'group_deny'   , []);
+	$contact_deny  = defaults($_REQUEST, 'contact_deny' , []);
+
+	$str_group_allow   = perms2str(is_array($group_allow)   ? $group_allow   : explode(',', $group_allow));
+	$str_contact_allow = perms2str(is_array($contact_allow) ? $contact_allow : explode(',', $contact_allow));
+	$str_group_deny    = perms2str(is_array($group_deny)    ? $group_deny    : explode(',', $group_deny));
+	$str_contact_deny  = perms2str(is_array($contact_deny)  ? $contact_deny  : explode(',', $contact_deny));
 
 	$ret = array('src' => '', 'filename' => '', 'filesize' => 0, 'type' => '');
 
-	call_hooks('photo_post_file',$ret);
+	call_hooks('photo_post_file', $ret);
 
-	if (x($ret,'src') && x($ret,'filesize')) {
+	if (x($ret, 'src') && x($ret, 'filesize')) {
 		$src      = $ret['src'];
 		$filename = $ret['filename'];
 		$filesize = $ret['filesize'];
 		$type     = $ret['type'];
+		$error    = UPLOAD_ERR_OK;
 	} else {
-		$src        = $_FILES['userfile']['tmp_name'];
-		$filename   = basename($_FILES['userfile']['name']);
-		$filesize   = intval($_FILES['userfile']['size']);
-		$type       = $_FILES['userfile']['type'];
+		$src      = $_FILES['userfile']['tmp_name'];
+		$filename = basename($_FILES['userfile']['name']);
+		$filesize = intval($_FILES['userfile']['size']);
+		$type     = $_FILES['userfile']['type'];
+		$error    = $_FILES['userfile']['error'];
 	}
+
+	if ($error !== UPLOAD_ERR_OK) {
+		switch ($error) {
+			case UPLOAD_ERR_INI_SIZE:
+				notice(t('Image exceeds size limit of %s', ini_get('upload_max_filesize')) . EOL);
+				break;
+			case UPLOAD_ERR_FORM_SIZE:
+				notice(t('Image exceeds size limit of %s', formatBytes(defaults($_REQUEST, 'MAX_FILE_SIZE', 0))) . EOL);
+				break;
+			case UPLOAD_ERR_PARTIAL:
+				notice(t('Image upload didn\'t complete, please try again') . EOL);
+				break;
+			case UPLOAD_ERR_NO_FILE:
+				notice(t('Image file is missing') . EOL);
+				break;
+			case UPLOAD_ERR_NO_TMP_DIR:
+			case UPLOAD_ERR_CANT_WRITE:
+			case UPLOAD_ERR_EXTENSION:
+				notice(t('Server can\'t accept new file upload at this time, please contact your administrator') . EOL);
+				break;
+		}
+		@unlink($src);
+		$foo = 0;
+		call_hooks('photo_post_end', $foo);
+		return;
+	}
+
 	if ($type == "") {
 		$type = Image::guessType($filename);
 	}
 
 	logger('photos: upload: received file: ' . $filename . ' as ' . $src . ' ('. $type . ') ' . $filesize . ' bytes', LOGGER_DEBUG);
 
-	$maximagesize = Config::get('system','maximagesize');
+	$maximagesize = Config::get('system', 'maximagesize');
 
 	if ($maximagesize && ($filesize > $maximagesize)) {
-		notice( sprintf(t('Image exceeds size limit of %s'), formatBytes($maximagesize)) . EOL);
+		notice(t('Image exceeds size limit of %s', formatBytes($maximagesize)) . EOL);
 		@unlink($src);
 		$foo = 0;
-		call_hooks('photo_post_end',$foo);
+		call_hooks('photo_post_end', $foo);
 		return;
 	}
 
 	if (!$filesize) {
-		notice( t('Image file is empty.') . EOL);
+		notice(t('Image file is empty.') . EOL);
 		@unlink($src);
 		$foo = 0;
-		call_hooks('photo_post_end',$foo);
+		call_hooks('photo_post_end', $foo);
 		return;
 	}
 
@@ -844,7 +845,7 @@ function photos_post(App $a) {
 
 	if (!$Image->isValid()) {
 		logger('mod/photos.php: photos_post(): unable to process image' , LOGGER_DEBUG);
-		notice( t('Unable to process image.') . EOL );
+		notice(t('Unable to process image.') . EOL);
 		@unlink($src);
 		$foo = 0;
 		call_hooks('photo_post_end',$foo);
@@ -873,7 +874,7 @@ function photos_post(App $a) {
 
 	if (!$r) {
 		logger('mod/photos.php: photos_post(): image store failed' , LOGGER_DEBUG);
-		notice( t('Image upload failed.') . EOL );
+		notice(t('Image upload failed.') . EOL);
 		killme();
 	}
 
@@ -889,23 +890,16 @@ function photos_post(App $a) {
 		$smallest = 2;
 	}
 
-	$basename = basename($filename);
 	$uri = item_new_uri($a->get_hostname(), $page_owner_uid);
 
 	// Create item container
-
 	$lat = $lon = null;
-
-	/// @TODO merge these 2 if() into one?
-	if ($exif && $exif['GPS']) {
-		if (Feature::isEnabled($channel_id,'photo_location')) {
-			$lat = getGps($exif['GPS']['GPSLatitude'], $exif['GPS']['GPSLatitudeRef']);
-			$lon = getGps($exif['GPS']['GPSLongitude'], $exif['GPS']['GPSLongitudeRef']);
-		}
+	if ($exif && $exif['GPS'] && Feature::isEnabled($channel_id, 'photo_location')) {
+		$lat = getGps($exif['GPS']['GPSLatitude'], $exif['GPS']['GPSLatitudeRef']);
+		$lon = getGps($exif['GPS']['GPSLongitude'], $exif['GPS']['GPSLongitudeRef']);
 	}
 
 	$arr = array();
-
 	if ($lat && $lon) {
 		$arr['coord'] = $lat . ' ' . $lon;
 	}
@@ -947,17 +941,15 @@ function photos_post(App $a) {
 
 	call_hooks('photo_post_end',intval($item_id));
 
-	/*
-	 * addon uploaders should call "killme()" [e.g. exit] within the photo_post_end hook
-	 * if they do not wish to be redirected
-	 */
+	// addon uploaders should call "killme()" [e.g. exit] within the photo_post_end hook
+	// if they do not wish to be redirected
 
 	goaway($_SESSION['photo_return']);
 	// NOTREACHED
 }
 
-function photos_content(App $a) {
-
+function photos_content(App $a)
+{
 	// URLs:
 	// photos/name
 	// photos/name/upload
@@ -967,7 +959,6 @@ function photos_content(App $a) {
 	// photos/name/image/xxxxx
 	// photos/name/image/xxxxx/edit
 
-
 	if (Config::get('system', 'block_public') && !local_user() && !remote_user()) {
 		notice( t('Public access denied.') . EOL);
 		return;
@@ -986,10 +977,8 @@ function photos_content(App $a) {
 
 	$_SESSION['photo_return'] = $a->cmd;
 
-	//
 	// Parse arguments
-	//
-
+	$datum = null;
 	if ($a->argc > 3) {
 		$datatype = $a->argv[2];
 		$datum = $a->argv[3];
@@ -1005,10 +994,7 @@ function photos_content(App $a) {
 		$cmd = 'view';
 	}
 
-	//
 	// Setup permissions structures
-	//
-
 	$can_post       = false;
 	$visitor        = 0;
 	$contact        = null;
@@ -1047,8 +1033,9 @@ function photos_content(App $a) {
 		}
 	}
 
-	// perhaps they're visiting - but not a community page, so they wouldn't have write access
+	$groups = [];
 
+	// perhaps they're visiting - but not a community page, so they wouldn't have write access
 	if (remote_user() && !$visitor) {
 		$contact_id = 0;
 		if (is_array($_SESSION['remote'])) {
@@ -1072,12 +1059,9 @@ function photos_content(App $a) {
 		}
 	}
 
-	/// @TODO merge these 2 if() into one?
-	if (!$remote_contact) {
-		if (local_user()) {
-			$contact_id = $_SESSION['cid'];
-			$contact = $a->contact;
-		}
+	if (!$remote_contact && local_user()) {
+		$contact_id = $_SESSION['cid'];
+		$contact = $a->contact;
 	}
 
 	if ($a->data['user']['hidewall'] && (local_user() != $owner_uid) && !$remote_contact) {
@@ -1085,7 +1069,7 @@ function photos_content(App $a) {
 		return;
 	}
 
-	$sql_extra = permissions_sql($owner_uid,$remote_contact,$groups);
+	$sql_extra = permissions_sql($owner_uid, $remote_contact, $groups);
 
 	$o = "";
 
@@ -1093,23 +1077,17 @@ function photos_content(App $a) {
 	$is_owner = (local_user() && (local_user() == $owner_uid));
 	$o .= profile_tabs($a, $is_owner, $a->data['user']['nickname']);
 
-	/**
-	 * Display upload form
-	 */
-
+	// Display upload form
 	if ($datatype === 'upload') {
 		if (!$can_post) {
 			notice(t('Permission denied.'));
 			return;
 		}
 
-
-		$selname = ($datum ? hex2bin($datum) : '');
-
+		$selname = $datum ? hex2bin($datum) : '';
 
 		$albumselect = '';
 
-
 		$albumselect .= '<option value="" ' . (!$selname ? ' selected="selected" ' : '') . '>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</option>';
 		if (count($a->data['albums'])) {
 			foreach ($a->data['albums'] as $album) {
@@ -1136,31 +1114,8 @@ function photos_content(App $a) {
 
 		$usage_message = '';
 
-		// Private/public post links for the non-JS ACL form
-		$private_post = 1;
-		if ($_REQUEST['public']) {
-			$private_post = 0;
-		}
-
-		$query_str = $a->query_string;
-		if (strpos($query_str, 'public=1') !== false) {
-			$query_str = str_replace(array('?public=1', '&public=1'), array('', ''), $query_str);
-		}
-
-		/*
-		 * I think $a->query_string may never have ? in it, but I could be wrong
-		 * It looks like it's from the index.php?q=[etc] rewrite that the web
-		 * server does, which converts any ? to &, e.g. suggest&ignore=61 for suggest?ignore=61
-		 */
-		if (strpos($query_str, '?') === false) {
-			$public_post_link = '?public=1';
-		} else {
-			$public_post_link = '&public=1';
-		}
-
 		$tpl = get_markup_template('photos_upload.tpl');
 
-		$albumselect_e = $albumselect;
 		$aclselect_e = ($visitor ? '' : populate_acl($a->user));
 
 		$o .= replace_macros($tpl,array(
@@ -1171,7 +1126,7 @@ function photos_content(App $a) {
 			'$newalbum' => t('New album name: '),
 			'$existalbumtext' => t('or existing album name: '),
 			'$nosharetext' => t('Do not show a status post for this upload'),
-			'$albumselect' => $albumselect_e,
+			'$albumselect' => $albumselect,
 			'$permissions' => t('Permissions'),
 			'$aclselect' => $aclselect_e,
 			'$alt_uploader' => $ret['addon_text'],
@@ -1183,23 +1138,14 @@ function photos_content(App $a) {
 			'$acl_data' => construct_acl_data($a, $a->user), // For non-Javascript ACL selector
 			'$group_perms' => t('Show to Groups'),
 			'$contact_perms' => t('Show to Contacts'),
-			'$private' => t('Private Photo'),
-			'$public' => t('Public Photo'),
-			'$is_private' => $private_post,
-			'$return_path' => $query_str,
-			'$public_link' => $public_post_link,
-
+			'$return_path' => $a->query_string,
 		));
 
 		return $o;
 	}
 
-	/*
-	 * Display a single photo album
-	 */
-
+	// Display a single photo album
 	if ($datatype === 'album') {
-
 		$album = hex2bin($datum);
 
 		$r = q("SELECT `resource-id`, max(`scale`) AS `scale` FROM `photo` WHERE `uid` = %d AND `album` = '%s'
@@ -1213,7 +1159,8 @@ function photos_content(App $a) {
 		}
 
 		/// @TODO I have seen this many times, maybe generalize it script-wide and encapsulate it?
-		if ($_GET['order'] === 'posted') {
+		$order_field = defaults($_GET, 'order', '');
+		if ($order_field === 'posted') {
 			$order = 'ASC';
 		} else {
 			$order = 'DESC';
@@ -1254,7 +1201,7 @@ function photos_content(App $a) {
 			}
 		}
 
-		if ($_GET['order'] === 'posted') {
+		if ($order_field === 'posted') {
 			$order =  array(t('Show Newest First'), 'photos/' . $a->data['user']['nickname'] . '/album/' . bin2hex($album));
 		} else {
 			$order = array(t('Show Oldest First'), 'photos/' . $a->data['user']['nickname'] . '/album/' . bin2hex($album) . '?f=&order=posted');
@@ -1262,7 +1209,7 @@ function photos_content(App $a) {
 
 		$photos = array();
 
-		if (DBM::is_result($r))
+		if (DBM::is_result($r)) {
 			// "Twist" is only used for the duepunto theme with style "slackr"
 			$twist = false;
 			foreach ($r as $rr) {
@@ -1277,14 +1224,15 @@ function photos_content(App $a) {
 					'id' => $rr['id'],
 					'twist' => ' ' . ($twist ? 'rotleft' : 'rotright') . rand(2,4),
 					'link' => 'photos/' . $a->data['user']['nickname'] . '/image/' . $rr['resource-id']
-						. (($_GET['order'] === 'posted') ? '?f=&order=posted' : ''),
+						. ($order_field === 'posted' ? '?f=&order=posted' : ''),
 					'title' => t('View Photo'),
 					'src' => 'photo/' . $rr['resource-id'] . '-' . $rr['scale'] . '.' .$ext,
 					'alt' => $imgalt_e,
 					'desc'=> $desc_e,
 					'ext' => $ext,
-					'hash'=> $rr['resource_id'],
+					'hash'=> $rr['resource-id'],
 				);
+			}
 		}
 
 		$tpl = get_markup_template('photo_album.tpl');
@@ -1302,14 +1250,9 @@ function photos_content(App $a) {
 
 	}
 
-	/*
-	 * Display one photo
-	 */
+	// Display one photo
 	if ($datatype === 'image') {
-
-		//$o = '';
 		// fetch image, item containing image, then comments
-
 		$ph = q("SELECT * FROM `photo` WHERE `uid` = %d AND `resource-id` = '%s'
 			$sql_extra ORDER BY `scale` ASC ",
 			intval($owner_uid),
@@ -1337,7 +1280,8 @@ function photos_content(App $a) {
 		// The query leads to a really intense used index.
 		// By now we hide it if someone wants to.
 		if (!Config::get('system', 'no_count', false)) {
-			if ($_GET['order'] === 'posted') {
+			$order_field = defaults($_GET, 'order', '');
+			if ($order_field === 'posted') {
 				$order = 'ASC';
 			} else {
 				$order = 'DESC';
@@ -1364,8 +1308,8 @@ function photos_content(App $a) {
 					}
 				}
 				$edit_suffix = ((($cmd === 'edit') && $can_post) ? '/edit' : '');
-				$prevlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$prv]['resource-id'] . $edit_suffix . (($_GET['order'] === 'posted') ? '?f=&order=posted' : '');
-				$nextlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$nxt]['resource-id'] . $edit_suffix . (($_GET['order'] === 'posted') ? '?f=&order=posted' : '');
+				$prevlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$prv]['resource-id'] . $edit_suffix . ($order_field === 'posted' ? '?f=&order=posted' : '');
+				$nextlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$nxt]['resource-id'] . $edit_suffix . ($order_field === 'posted' ? '?f=&order=posted' : '');
  			}
 		}
 
@@ -1439,6 +1383,7 @@ function photos_content(App $a) {
 		);
 
 		$map = null;
+		$link_item = [];
 
 		if (DBM::is_result($linked_items)) {
 			$link_item = $linked_items[0];
@@ -1512,31 +1457,9 @@ function photos_content(App $a) {
 
 
 		$edit = Null;
-		if (($cmd === 'edit') && $can_post) {
+		if ($cmd === 'edit' && $can_post) {
 			$edit_tpl = get_markup_template('photo_edit.tpl');
 
-			// Private/public post links for the non-JS ACL form
-			$private_post = 1;
-			if ($_REQUEST['public']) {
-				$private_post = 0;
-			}
-
-			$query_str = $a->query_string;
-			if (strpos($query_str, 'public=1') !== false) {
-				$query_str = str_replace(array('?public=1', '&public=1'), array('', ''), $query_str);
-			}
-
-			/*
-			 * I think $a->query_string may never have ? in it, but I could be wrong
-			 * It looks like it's from the index.php?q=[etc] rewrite that the web
-			 * server does, which converts any ? to &, e.g. suggest&ignore=61 for suggest?ignore=61
-			 */
-			if (strpos($query_str, '?') === false) {
-				$public_post_link = '?public=1';
-			} else {
-				$public_post_link = '&public=1';
-			}
-
 			$album_e = $ph[0]['album'];
 			$caption_e = $ph[0]['desc'];
 			$aclselect_e = populate_acl($ph[0]);
@@ -1555,7 +1478,7 @@ function photos_content(App $a) {
 				'$permissions' => t('Permissions'),
 				'$aclselect' => $aclselect_e,
 
-				'$item_id' => (count($linked_items) ? $link_item['id'] : 0),
+				'$item_id' => defaults($link_item, 'id', 0),
 				'$submit' => t('Submit'),
 				'$delete' => t('Delete Photo'),
 
@@ -1563,25 +1486,24 @@ function photos_content(App $a) {
 				'$acl_data' => construct_acl_data($a, $ph[0]), // For non-Javascript ACL selector
 				'$group_perms' => t('Show to Groups'),
 				'$contact_perms' => t('Show to Contacts'),
-				'$private' => t('Private photo'),
-				'$public' => t('Public photo'),
-				'$is_private' => $private_post,
-				'$return_path' => $query_str,
-				'$public_link' => $public_post_link,
+				'$return_path' => $a->query_string,
 			));
 		}
 
-		if (count($linked_items)) {
+		$like = '';
+		$dislike = '';
+		$likebuttons = '';
+		$comments = '';
+		$paginate = '';
+		$responses = '';
 
+		if (count($linked_items)) {
 			$cmnt_tpl = get_markup_template('comment_item.tpl');
 			$tpl = get_markup_template('photo_item.tpl');
 			$return_url = $a->cmd;
 
-			$like_tpl = get_markup_template('like_noshare.tpl');
-
-			$likebuttons = '';
-
 			if ($can_post || can_write_wall($a, $owner_uid)) {
+				$like_tpl = get_markup_template('like_noshare.tpl');
 				$likebuttons = replace_macros($like_tpl, array(
 					'$id' => $link_item['id'],
 					'$likethis' => t("I like this \x28toggle\x29"),
@@ -1591,7 +1513,6 @@ function photos_content(App $a) {
 				));
 			}
 
-			$comments = '';
 			if (!DBM::is_result($r)) {
 				if (($can_post || can_write_wall($a, $owner_uid)) && $link_item['last-child']) {
 					$comments .= replace_macros($cmnt_tpl, array(
@@ -1614,12 +1535,6 @@ function photos_content(App $a) {
 				}
 			}
 
-			$alike = array();
-			$dlike = array();
-
-			$like = '';
-			$dislike = '';
-
 			$conv_responses = array(
 				'like' => array('title' => t('Likes','title')),'dislike' => array('title' => t('Dislikes','title')),
 				'attendyes' => array('title' => t('Attending','title')), 'attendno' => array('title' => t('Not attending','title')), 'attendmaybe' => array('title' => t('Might attend','title'))
@@ -1627,13 +1542,16 @@ function photos_content(App $a) {
 
 			// display comments
 			if (DBM::is_result($r)) {
-
 				foreach ($r as $item) {
 					builtin_activity_puller($item, $conv_responses);
 				}
 
-				$like    = (x($conv_responses['like'], $link_item['uri']) ? format_like($conv_responses['like'][$link_item['uri']], $conv_responses['like'][$link_item['uri'] . '-l'], 'like',$link_item['id']) : '');
-				$dislike = (x($conv_responses['dislike'], $link_item['uri']) ? format_like($conv_responses['dislike'][$link_item['uri']], $conv_responses['dislike'][$link_item['uri'] . '-l'], 'dislike',$link_item['id']) : '');
+				if (x($conv_responses['like'], $link_item['uri'])) {
+					$like = format_like($conv_responses['like'][$link_item['uri']], $conv_responses['like'][$link_item['uri'] . '-l'], 'like', $link_item['id']);
+				}
+				if (x($conv_responses['dislike'], $link_item['uri'])) {
+					$dislike = format_like($conv_responses['dislike'][$link_item['uri']], $conv_responses['dislike'][$link_item['uri'] . '-l'], 'dislike', $link_item['id']);
+				}
 
 				if (($can_post || can_write_wall($a, $owner_uid)) && $link_item['last-child']) {
 					$comments .= replace_macros($cmnt_tpl,array(
@@ -1655,18 +1573,17 @@ function photos_content(App $a) {
 					));
 				}
 
-
 				foreach ($r as $item) {
 					$comment = '';
 					$template = $tpl;
 					$sparkle = '';
 
-					if ((activity_match($item['verb'], ACTIVITY_LIKE) || activity_match($item['verb'], ACTIVITY_DISLIKE)) && ($item['id'] != $item['parent']))
+					if ((activity_match($item['verb'], ACTIVITY_LIKE) || activity_match($item['verb'], ACTIVITY_DISLIKE)) && ($item['id'] != $item['parent'])) {
 						continue;
+					}
 
 					$redirect_url = 'redir/' . $item['cid'];
 
-
 					if (local_user() && ($item['contact-uid'] == local_user())
 						&& ($item['network'] == NETWORK_DFRN) && !$item['self']) {
 						$profile_url = $redirect_url;
@@ -1730,40 +1647,32 @@ function photos_content(App $a) {
 					}
 				}
 			}
+			$response_verbs = array('like');
+			if (Feature::isEnabled($owner_uid, 'dislike')) {
+				$response_verbs[] = 'dislike';
+			}
+			$responses = get_responses($conv_responses, $response_verbs, '', $link_item);
 
 			$paginate = paginate($a);
 		}
 
-
-		$response_verbs = array('like');
-		if (Feature::isEnabled($owner_uid, 'dislike')) {
-			$response_verbs[] = 'dislike';
-		}
-		$responses = get_responses($conv_responses,$response_verbs, '', $link_item);
-
 		$photo_tpl = get_markup_template('photo_view.tpl');
-
-		$album_e = array($album_link, $ph[0]['album']);
-		$tags_e = $tags;
-		$like_e = $like;
-		$dislike_e = $dislike;
-
 		$o .= replace_macros($photo_tpl, array(
 			'$id' => $ph[0]['id'],
-			'$album' => $album_e,
+			'$album' => [$album_link, $ph[0]['album']],
 			'$tools' => $tools,
 			'$lock' => $lock,
 			'$photo' => $photo,
 			'$prevlink' => $prevlink,
 			'$nextlink' => $nextlink,
 			'$desc' => $ph[0]['desc'],
-			'$tags' => $tags_e,
+			'$tags' => $tags,
 			'$edit' => $edit,
 			'$map' => $map,
 			'$map_text' => t('Map'),
 			'$likebuttons' => $likebuttons,
-			'$like' => $like_e,
-			'$dislike' => $dikslike_e,
+			'$like' => $like,
+			'$dislike' => $dislike,
 			'responses' => $responses,
 			'$comments' => $comments,
 			'$paginate' => $paginate,
diff --git a/mod/ping.php b/mod/ping.php
index 930ed54ff..d8eaa8126 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -164,8 +164,8 @@ function ping_init(App $a)
 
 			if (intval(Feature::isEnabled(local_user(), 'forumlist_widget'))) {
 				$forum_counts = ForumManager::countUnseenItems();
-				if (DBM::is_result($forums_counts)) {
-					foreach ($forums_counts as $forum_count) {
+				if (DBM::is_result($forum_counts)) {
+					foreach ($forum_counts as $forum_count) {
 						if ($forum_count['count'] > 0) {
 							$forums_unseen[] = $forum_count;
 						}
@@ -490,8 +490,10 @@ function ping_get_notifications($uid)
 
 			$notification["href"] = System::baseUrl() . "/notify/view/" . $notification["id"];
 
-			if ($notification["visible"] && !$notification["spam"]
-				&& !$notification["deleted"] && !is_array($result[$notification["parent"]])
+			if ($notification["visible"]
+				&& !$notification["spam"]
+				&& !$notification["deleted"]
+				&& !(x($result, $notification["parent"]) && is_array($result[$notification["parent"]]))
 			) {
 				// Should we condense the notifications or show them all?
 				if (PConfig::get(local_user(), 'system', 'detailed_notif')) {
diff --git a/mod/profile.php b/mod/profile.php
index 9d4bd57c8..f439f754c 100644
--- a/mod/profile.php
+++ b/mod/profile.php
@@ -8,78 +8,80 @@ use Friendica\Database\DBM;
 use Friendica\Model\Group;
 use Friendica\Module\Login;
 
-require_once('include/contact_widgets.php');
-require_once('include/redir.php');
+require_once 'include/contact_widgets.php';
+require_once 'include/redir.php';
 
-function profile_init(App $a) {
-
-	if(! x($a->page,'aside'))
+function profile_init(App $a)
+{
+	if (!x($a->page, 'aside')) {
 		$a->page['aside'] = '';
+	}
 
-	if($a->argc > 1)
+	if ($a->argc > 1) {
 		$which = htmlspecialchars($a->argv[1]);
-	else {
-		$r = q("select nickname from user where blocked = 0 and account_expired = 0 and account_removed = 0 and verified = 1 order by rand() limit 1");
+	} else {
+		$r = q("SELECT `nickname` FROM `user` WHERE `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 ORDER BY RAND() LIMIT 1");
 		if (DBM::is_result($r)) {
 			goaway(System::baseUrl() . '/profile/' . $r[0]['nickname']);
-		}
-		else {
+		} else {
 			logger('profile error: mod_profile ' . $a->query_string, LOGGER_DEBUG);
-			notice( t('Requested profile is not available.') . EOL );
+			notice(t('Requested profile is not available.') . EOL);
 			$a->error = 404;
 			return;
 		}
 	}
 
 	$profile = 0;
-	if((local_user()) && ($a->argc > 2) && ($a->argv[2] === 'view')) {
+	if (local_user() && $a->argc > 2 && $a->argv[2] === 'view') {
 		$which = $a->user['nickname'];
 		$profile = htmlspecialchars($a->argv[1]);
-	}
-	else {
+	} else {
 		auto_redir($a, $which);
 	}
 
-	profile_load($a,$which,$profile);
+	profile_load($a, $which, $profile);
 
-	$blocked = (((Config::get('system','block_public')) && (! local_user()) && (! remote_user())) ? true : false);
-	$userblock = (($a->profile['hidewall'] && (! local_user()) && (! remote_user())) ? true : false);
+	$blocked   = !local_user() && !remote_user() && Config::get('system', 'block_public');
+	$userblock = !local_user() && !remote_user() && $a->profile['hidewall'];
 
-	if((x($a->profile,'page-flags')) && ($a->profile['page-flags'] == PAGE_COMMUNITY)) {
+	if (x($a->profile, 'page-flags') && $a->profile['page-flags'] == PAGE_COMMUNITY) {
 		$a->page['htmlhead'] .= '<meta name="friendica.community" content="true" />';
 	}
-	if (x($a->profile,'openidserver')) {
+
+	if (x($a->profile, 'openidserver')) {
 		$a->page['htmlhead'] .= '<link rel="openid.server" href="' . $a->profile['openidserver'] . '" />' . "\r\n";
 	}
-	if (x($a->profile,'openid')) {
-		$delegate = ((strstr($a->profile['openid'],'://')) ? $a->profile['openid'] : 'https://' . $a->profile['openid']);
+
+	if (x($a->profile, 'openid')) {
+		$delegate = strstr($a->profile['openid'], '://') ? $a->profile['openid'] : 'https://' . $a->profile['openid'];
 		$a->page['htmlhead'] .= '<link rel="openid.delegate" href="' . $delegate . '" />' . "\r\n";
 	}
+
 	// site block
-	if ((! $blocked) && (! $userblock)) {
-		$keywords = ((x($a->profile,'pub_keywords')) ? $a->profile['pub_keywords'] : '');
-		$keywords = str_replace(array('#',',',' ',',,'),array('',' ',',',','),$keywords);
-		if(strlen($keywords))
-			$a->page['htmlhead'] .= '<meta name="keywords" content="' . $keywords . '" />' . "\r\n" ;
+	if (!$blocked && !$userblock) {
+		$keywords = str_replace(array('#', ',', ' ', ',,'), array('', ' ', ',', ','), defaults($a->profile, 'pub_keywords', ''));
+		if (strlen($keywords)) {
+			$a->page['htmlhead'] .= '<meta name="keywords" content="' . $keywords . '" />' . "\r\n";
+		}
 	}
 
-	$a->page['htmlhead'] .= '<meta name="dfrn-global-visibility" content="' . (($a->profile['net-publish']) ? 'true' : 'false') . '" />' . "\r\n" ;
-	$a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . System::baseUrl() . '/dfrn_poll/' . $which .'" />' . "\r\n" ;
-	$uri = urlencode('acct:' . $a->profile['nickname'] . '@' . $a->get_hostname() . (($a->path) ? '/' . $a->path : ''));
+	$a->page['htmlhead'] .= '<meta name="dfrn-global-visibility" content="' . ($a->profile['net-publish'] ? 'true' : 'false') . '" />' . "\r\n";
+	$a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . System::baseUrl() . '/feed/' . $which . '/" title="' . t('%s\'s posts', $a->profile['username']) . '"/>' . "\r\n";
+	$a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . System::baseUrl() . '/feed/' . $which . '/comments" title="' . t('%s\'s comments', $a->profile['username']) . '"/>' . "\r\n";
+	$a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . System::baseUrl() . '/feed/' . $which . '/activity" title="' . t('%s\'s timeline', $a->profile['username']) . '"/>' . "\r\n";
+	$uri = urlencode('acct:' . $a->profile['nickname'] . '@' . $a->get_hostname() . ($a->path ? '/' . $a->path : ''));
 	$a->page['htmlhead'] .= '<link rel="lrdd" type="application/xrd+xml" href="' . System::baseUrl() . '/xrd/?uri=' . $uri . '" />' . "\r\n";
 	header('Link: <' . System::baseUrl() . '/xrd/?uri=' . $uri . '>; rel="lrdd"; type="application/xrd+xml"', false);
 
 	$dfrn_pages = array('request', 'confirm', 'notify', 'poll');
 	foreach ($dfrn_pages as $dfrn) {
-		$a->page['htmlhead'] .= "<link rel=\"dfrn-{$dfrn}\" href=\"".System::baseUrl()."/dfrn_{$dfrn}/{$which}\" />\r\n";
+		$a->page['htmlhead'] .= "<link rel=\"dfrn-{$dfrn}\" href=\"" . System::baseUrl() . "/dfrn_{$dfrn}/{$which}\" />\r\n";
 	}
-	$a->page['htmlhead'] .= "<link rel=\"dfrn-poco\" href=\"".System::baseUrl()."/poco/{$which}\" />\r\n";
-
+	$a->page['htmlhead'] .= '<link rel="dfrn-poco" href="' . System::baseUrl() . "/poco/{$which}\" />\r\n";
 }
 
-
-function profile_content(App $a, $update = 0) {
-
+function profile_content(App $a, $update = 0)
+{
 	$category = $datequery = $datequery2 = '';
 
 	if ($a->argc > 2) {
@@ -96,21 +98,21 @@ function profile_content(App $a, $update = 0) {
 		}
 	}
 
-	if (! x($category)) {
-		$category = ((x($_GET,'category')) ? $_GET['category'] : '');
+	if (!x($category)) {
+		$category = defaults($_GET, 'category', '');
 	}
 
-	$hashtags = (x($_GET, 'tag') ? $_GET['tag'] : '');
+	$hashtags = defaults($_GET, 'tag', '');
 
-	if (Config::get('system','block_public') && (! local_user()) && (! remote_user())) {
+	if (Config::get('system', 'block_public') && !local_user() && !remote_user()) {
 		return Login::form();
 	}
 
-	require_once("include/bbcode.php");
-	require_once('include/security.php');
-	require_once('include/conversation.php');
-	require_once('include/acl_selectors.php');
-	require_once('include/items.php');
+	require_once 'include/bbcode.php';
+	require_once 'include/security.php';
+	require_once 'include/conversation.php';
+	require_once 'include/acl_selectors.php';
+	require_once 'include/items.php';
 
 	$groups = array();
 
@@ -129,7 +131,7 @@ function profile_content(App $a, $update = 0) {
 
 	$contact_id = 0;
 
-	if (is_array($_SESSION['remote'])) {
+	if (x($_SESSION, 'remote') && is_array($_SESSION['remote'])) {
 		foreach ($_SESSION['remote'] as $v) {
 			if ($v['uid'] == $a->profile['profile_uid']) {
 				$contact_id = $v['cid'];
@@ -150,74 +152,75 @@ function profile_content(App $a, $update = 0) {
 		}
 	}
 
-	if (! $remote_contact) {
+	if (!$remote_contact) {
 		if (local_user()) {
 			$contact_id = $_SESSION['cid'];
 			$contact = $a->contact;
 		}
 	}
 
-	$is_owner = ((local_user()) && (local_user() == $a->profile['profile_uid']) ? true : false);
+	$is_owner = local_user() == $a->profile['profile_uid'];
 	$last_updated_key = "profile:" . $a->profile['profile_uid'] . ":" . local_user() . ":" . remote_user();
 
-	if ($a->profile['hidewall'] && (! $is_owner) && (! $remote_contact)) {
-		notice( t('Access to this profile has been restricted.') . EOL);
+	if (x($a->profile, 'hidewall') && !$is_owner && !$remote_contact) {
+		notice(t('Access to this profile has been restricted.') . EOL);
 		return;
 	}
 
-	if (! $update) {
-		if (x($_GET,'tab')) {
+	if (!$update) {
+		$tab = false;
+		if (x($_GET, 'tab')) {
 			$tab = notags(trim($_GET['tab']));
 		}
 
-		$o.=profile_tabs($a, $is_owner, $a->profile['nickname']);
+		$o .= profile_tabs($a, $is_owner, $a->profile['nickname']);
 
 		if ($tab === 'profile') {
 			$o .= advanced_profile($a);
-			call_hooks('profile_advanced',$o);
+			call_hooks('profile_advanced', $o);
 			return $o;
 		}
 
 		$o .= common_friends_visitor_widget($a->profile['profile_uid']);
 
-		if (x($_SESSION,'new_member') && $_SESSION['new_member'] && $is_owner) {
+		if (x($_SESSION, 'new_member') && $is_owner) {
 			$o .= '<a href="newmember" id="newmember-tips" style="font-size: 1.2em;"><b>' . t('Tips for New Members') . '</b></a>' . EOL;
 		}
 
-		$commpage = (($a->profile['page-flags'] == PAGE_COMMUNITY) ? true : false);
-		$commvisitor = (($commpage && $remote_contact == true) ? true : false);
+		$commpage = $a->profile['page-flags'] == PAGE_COMMUNITY;
+		$commvisitor = $commpage && $remote_contact;
 
-		$a->page['aside'] .= posted_date_widget(System::baseUrl(true) . '/profile/' . $a->profile['nickname'],$a->profile['profile_uid'],true);
-		$a->page['aside'] .= categories_widget(System::baseUrl(true) . '/profile/' . $a->profile['nickname'],(x($category) ? xmlify($category) : ''));
+		$a->page['aside'] .= posted_date_widget(System::baseUrl(true) . '/profile/' . $a->profile['nickname'], $a->profile['profile_uid'], true);
+		$a->page['aside'] .= categories_widget(System::baseUrl(true) . '/profile/' . $a->profile['nickname'], (x($category) ? xmlify($category) : ''));
 		$a->page['aside'] .= tagcloud_wall_widget();
 
-		if (can_write_wall($a,$a->profile['profile_uid'])) {
-
+		if (can_write_wall($a, $a->profile['profile_uid'])) {
 			$x = array(
 				'is_owner' => $is_owner,
-				'allow_location' => ((($is_owner || $commvisitor) && $a->profile['allow_location']) ? true : false),
-				'default_location' => (($is_owner) ? $a->user['default-location'] : ''),
+				'allow_location' => ($is_owner || $commvisitor) && $a->profile['allow_location'],
+				'default_location' => $is_owner ? $a->user['default-location'] : '',
 				'nickname' => $a->profile['nickname'],
-				'lockstate' => (((is_array($a->user) && ((strlen($a->user['allow_cid'])) ||
-						(strlen($a->user['allow_gid'])) || (strlen($a->user['deny_cid'])) ||
-						(strlen($a->user['deny_gid']))))) ? 'lock' : 'unlock'),
-				'acl' => (($is_owner) ? populate_acl($a->user, true) : ''),
+				'lockstate' => is_array($a->user)
+					&& (strlen($a->user['allow_cid'])
+						|| strlen($a->user['allow_gid'])
+						|| strlen($a->user['deny_cid'])
+						|| strlen($a->user['deny_gid'])
+					) ? 'lock' : 'unlock',
+				'acl' => $is_owner ? populate_acl($a->user, true) : '',
 				'bang' => '',
-				'visitor' => (($is_owner || $commvisitor) ? 'block' : 'none'),
+				'visitor' => $is_owner || $commvisitor ? 'block' : 'none',
 				'profile_uid' => $a->profile['profile_uid'],
-				'acl_data' => ( $is_owner ? construct_acl_data($a, $a->user) : '' ), // For non-Javascript ACL selector
+				'acl_data' => $is_owner ? construct_acl_data($a, $a->user) : '', // For non-Javascript ACL selector
 			);
 
-			$o .= status_editor($a,$x);
+			$o .= status_editor($a, $x);
 		}
 	}
 
 
-	/**
-	 * Get permissions SQL - if $remote_contact is true, our remote user has been pre-verified and we already have fetched his/her groups
-	 */
-	$sql_extra = item_permissions_sql($a->profile['profile_uid'],$remote_contact,$groups);
-
+	// Get permissions SQL - if $remote_contact is true, our remote user has been pre-verified and we already have fetched his/her groups
+	$sql_extra = item_permissions_sql($a->profile['profile_uid'], $remote_contact, $groups);
+	$sql_extra2 = '';
 
 	if ($update) {
 		$last_updated = (x($_SESSION['last_updated'], $last_updated_key) ? $_SESSION['last_updated'][$last_updated_key] : 0);
@@ -235,7 +238,7 @@ function profile_content(App $a, $update = 0) {
 			FROM `item` INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 			AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 			WHERE `item`.`uid` = %d AND `item`.`visible` = 1 AND
-			(`item`.`deleted` = 0 OR item.verb = '" . ACTIVITY_LIKE ."'
+			(`item`.`deleted` = 0 OR item.verb = '" . ACTIVITY_LIKE . "'
 			OR item.verb = '" . ACTIVITY_DISLIKE . "' OR item.verb = '" . ACTIVITY_ATTEND . "'
 			OR item.verb = '" . ACTIVITY_ATTENDNO . "' OR item.verb = '" . ACTIVITY_ATTENDMAYBE . "')
 			AND `item`.`moderated` = 0
@@ -249,14 +252,12 @@ function profile_content(App $a, $update = 0) {
 		if (!DBM::is_result($r)) {
 			return '';
 		}
-
 	} else {
 		$sql_post_table = "";
 
 		if (x($category)) {
 			$sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 				dbesc(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($a->profile['profile_uid']));
-			//$sql_extra .= protect_sprintf(file_tag_file_query('item',$category,'category'));
 		}
 
 		if (x($hashtags)) {
@@ -265,10 +266,10 @@ function profile_content(App $a, $update = 0) {
 		}
 
 		if ($datequery) {
-			$sql_extra2 .= protect_sprintf(sprintf(" AND `thread`.`created` <= '%s' ", dbesc(datetime_convert(date_default_timezone_get(),'',$datequery))));
+			$sql_extra2 .= protect_sprintf(sprintf(" AND `thread`.`created` <= '%s' ", dbesc(datetime_convert(date_default_timezone_get(), '', $datequery))));
 		}
 		if ($datequery2) {
-			$sql_extra2 .= protect_sprintf(sprintf(" AND `thread`.`created` >= '%s' ", dbesc(datetime_convert(date_default_timezone_get(),'',$datequery2))));
+			$sql_extra2 .= protect_sprintf(sprintf(" AND `thread`.`created` >= '%s' ", dbesc(datetime_convert(date_default_timezone_get(), '', $datequery2))));
 		}
 
 		// Belongs the profile page to a forum?
@@ -276,7 +277,8 @@ function profile_content(App $a, $update = 0) {
 		$r = q("SELECT `uid` FROM `user` WHERE `uid` = %d AND `page-flags` IN (%d, %d)",
 			intval($a->profile['profile_uid']),
 			intval(PAGE_COMMUNITY),
-			intval(PAGE_PRVGROUP));
+			intval(PAGE_PRVGROUP)
+		);
 
 		if (!DBM::is_result($r)) {
 			$sql_extra3 = sprintf(" AND `thread`.`contact-id` = %d ", intval(intval($a->profile['contact_id'])));
@@ -285,20 +287,20 @@ function profile_content(App $a, $update = 0) {
 		//  check if we serve a mobile device and get the user settings
 		//  accordingly
 		if ($a->is_mobile) {
-			$itemspage_network = PConfig::get(local_user(),'system','itemspage_mobile_network');
-			$itemspage_network = ((intval($itemspage_network)) ? $itemspage_network : 10);
+			$itemspage_network = PConfig::get(local_user(), 'system', 'itemspage_mobile_network', 10);
 		} else {
-			$itemspage_network = PConfig::get(local_user(),'system','itemspage_network');
-			$itemspage_network = ((intval($itemspage_network)) ? $itemspage_network : 20);
+			$itemspage_network = PConfig::get(local_user(), 'system', 'itemspage_network', 20);
 		}
+
 		//  now that we have the user settings, see if the theme forces
 		//  a maximum item number which is lower then the user choice
-		if(($a->force_max_items > 0) && ($a->force_max_items < $itemspage_network))
+		if (($a->force_max_items > 0) && ($a->force_max_items < $itemspage_network)) {
 			$itemspage_network = $a->force_max_items;
+		}
 
 		$a->set_pager_itemspage($itemspage_network);
 
-		$pager_sql = sprintf(" LIMIT %d, %d ",intval($a->pager['start']), intval($a->pager['itemspage']));
+		$pager_sql = sprintf(" LIMIT %d, %d ", intval($a->pager['start']), intval($a->pager['itemspage']));
 
 		$r = q("SELECT `thread`.`iid` AS `item_id`, `thread`.`network` AS `item_network`
 			FROM `thread`
@@ -314,7 +316,6 @@ function profile_content(App $a, $update = 0) {
 			ORDER BY `thread`.`created` DESC $pager_sql",
 			intval($a->profile['profile_uid'])
 		);
-
 	}
 
 	$parents_arr = array();
@@ -325,23 +326,25 @@ function profile_content(App $a, $update = 0) {
 	$_SESSION['last_updated'][$last_updated_key] = time();
 
 	if (DBM::is_result($r)) {
-		foreach($r as $rr)
+		foreach ($r as $rr) {
 			$parents_arr[] = $rr['item_id'];
+		}
+
 		$parents_str = implode(', ', $parents_arr);
 
-		$items = q(item_query()." AND `item`.`uid` = %d
+		$items = q(item_query() . " AND `item`.`uid` = %d
 			AND `item`.`parent` IN (%s)
 			$sql_extra ",
 			intval($a->profile['profile_uid']),
 			dbesc($parents_str)
 		);
 
-		$items = conv_sort($items,'created');
+		$items = conv_sort($items, 'created');
 	} else {
 		$items = array();
 	}
 
-	if($is_owner && (! $update) && (! Config::get('theme','hide_eventlist'))) {
+	if ($is_owner && !$update && !Config::get('theme', 'hide_eventlist')) {
 		$o .= get_birthdays();
 		$o .= get_events();
 	}
diff --git a/mod/receive.php b/mod/receive.php
index 467a0d00a..fcc898a0c 100644
--- a/mod/receive.php
+++ b/mod/receive.php
@@ -9,8 +9,6 @@ use Friendica\Core\Config;
 use Friendica\Database\DBM;
 use Friendica\Protocol\Diaspora;
 
-require_once 'include/crypto.php';
-
 /**
  * @param object $a App
  * @return void
diff --git a/mod/salmon.php b/mod/salmon.php
index 4d8b130f9..bd08431a4 100644
--- a/mod/salmon.php
+++ b/mod/salmon.php
@@ -7,8 +7,8 @@ use Friendica\Core\PConfig;
 use Friendica\Database\DBM;
 use Friendica\Protocol\OStatus;
 use Friendica\Protocol\Salmon;
+use Friendica\Util\Crypto;
 
-require_once 'include/crypto.php';
 require_once 'include/items.php';
 require_once 'include/follow.php';
 
@@ -117,23 +117,23 @@ function salmon_post(App $a) {
 
 	logger('mod-salmon: key details: ' . print_r($key_info,true), LOGGER_DEBUG);
 
-	$pubkey = metopem($m,$e);
+	$pubkey = Crypto::meToPem($m, $e);
 
 	// We should have everything we need now. Let's see if it verifies.
 
 	// Try GNU Social format
-	$verify = rsa_verify($signed_data, $signature, $pubkey);
+	$verify = Crypto::rsaVerify($signed_data, $signature, $pubkey);
 	$mode = 1;
 
 	if (! $verify) {
 		logger('mod-salmon: message did not verify using protocol. Trying compliant format.');
-		$verify = rsa_verify($compliant_format, $signature, $pubkey);
+		$verify = Crypto::rsaVerify($compliant_format, $signature, $pubkey);
 		$mode = 2;
 	}
 
 	if (! $verify) {
 		logger('mod-salmon: message did not verify using padding. Trying old statusnet format.');
-		$verify = rsa_verify($stnet_signed_data, $signature, $pubkey);
+		$verify = Crypto::rsaVerify($stnet_signed_data, $signature, $pubkey);
 		$mode = 3;
 	}
 
diff --git a/mod/videos.php b/mod/videos.php
index 11b7e21be..a7759f741 100644
--- a/mod/videos.php
+++ b/mod/videos.php
@@ -8,11 +8,11 @@ use Friendica\Database\DBM;
 use Friendica\Model\Contact;
 use Friendica\Model\Group;
 
-require_once('include/items.php');
-require_once('include/acl_selectors.php');
-require_once('include/bbcode.php');
-require_once('include/security.php');
-require_once('include/redir.php');
+require_once 'include/items.php';
+require_once 'include/acl_selectors.php';
+require_once 'include/bbcode.php';
+require_once 'include/security.php';
+require_once 'include/redir.php';
 
 function videos_init(App $a) {
 
@@ -45,12 +45,12 @@ function videos_init(App $a) {
 
 		$tpl = get_markup_template("vcard-widget.tpl");
 
-		$vcard_widget .= replace_macros($tpl, array(
+		$vcard_widget = replace_macros($tpl, array(
 			'$name' => $profile['name'],
 			'$photo' => $profile['photo'],
-			'$addr' => (($profile['addr'] != "") ? $profile['addr'] : ""),
+			'$addr' => defaults($profile, 'addr', ''),
 			'$account_type' => $account_type,
-			'$pdesc' => (($profile['pdesc'] != "") ? $profile['pdesc'] : ""),
+			'$pdesc' => defaults($profile, 'pdesc', ''),
 		));
 
 
@@ -281,8 +281,9 @@ function videos_content(App $a) {
 		}
 	}
 
-	// perhaps they're visiting - but not a community page, so they wouldn't have write access
+	$groups = [];
 
+	// perhaps they're visiting - but not a community page, so they wouldn't have write access
 	if(remote_user() && (! $visitor)) {
 		$contact_id = 0;
 		if(is_array($_SESSION['remote'])) {
@@ -318,7 +319,7 @@ function videos_content(App $a) {
 		return;
 	}
 
-	$sql_extra = permissions_sql($owner_uid,$remote_contact,$groups);
+	$sql_extra = permissions_sql($owner_uid, $remote_contact, $groups);
 
 	$o = "";
 
diff --git a/mod/xrd.php b/mod/xrd.php
index 49fdde254..363994a8d 100644
--- a/mod/xrd.php
+++ b/mod/xrd.php
@@ -1,12 +1,14 @@
 <?php
-
+/**
+ * @file mod/xrd.php
+ */
 use Friendica\App;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
+use Friendica\Protocol\Salmon;
 
-require_once('include/crypto.php');
-
-function xrd_init(App $a) {
+function xrd_init(App $a)
+{
 	if ($a->argv[0] == 'xrd') {
 		$uri = urldecode(notags(trim($_GET['uri'])));
 		if ($_SERVER['HTTP_ACCEPT'] == 'application/jrd+json') {
@@ -54,8 +56,9 @@ function xrd_init(App $a) {
 	}
 }
 
-function xrd_json($a, $uri, $alias, $profile_url, $r) {
-	$salmon_key = salmon_key($r['spubkey']);
+function xrd_json($a, $uri, $alias, $profile_url, $r)
+{
+	$salmon_key = Salmon::salmonKey($r['spubkey']);
 
 	header('Access-Control-Allow-Origin: *');
 	header("Content-type: application/json; charset=utf-8");
@@ -79,8 +82,9 @@ function xrd_json($a, $uri, $alias, $profile_url, $r) {
 	killme();
 }
 
-function xrd_xml($a, $uri, $alias, $profile_url, $r) {
-	$salmon_key = salmon_key($r['spubkey']);
+function xrd_xml($a, $uri, $alias, $profile_url, $r)
+{
+	$salmon_key = Salmon::salmonKey($r['spubkey']);
 
 	header('Access-Control-Allow-Origin: *');
 	header("Content-type: text/xml");
@@ -100,8 +104,8 @@ function xrd_xml($a, $uri, $alias, $profile_url, $r) {
 		'$salmon'      => System::baseUrl() . '/salmon/'        . $r['nickname'],
 		'$salmen'      => System::baseUrl() . '/salmon/'        . $r['nickname'] . '/mention',
 		'$subscribe'   => System::baseUrl() . '/follow?url={uri}',
-		'$modexp'      => 'data:application/magic-public-key,'  . $salmon_key,
-	));
+		'$modexp'      => 'data:application/magic-public-key,'  . $salmon_key)
+	);
 
 	$arr = array('user' => $r, 'xml' => $o);
 	call_hooks('personal_xrd', $arr);
diff --git a/src/App.php b/src/App.php
index c32cf79d9..f9f443449 100644
--- a/src/App.php
+++ b/src/App.php
@@ -37,6 +37,7 @@ class App {
 	public $query_string;
 	public $config;
 	public $page;
+	public $page_offset;
 	public $profile;
 	public $profile_uid;
 	public $user;
diff --git a/src/Content/OEmbed.php b/src/Content/OEmbed.php
new file mode 100644
index 000000000..70be8fd73
--- /dev/null
+++ b/src/Content/OEmbed.php
@@ -0,0 +1,355 @@
+<?php
+
+/**
+ * @file src/Content/OEmbed.php
+ */
+
+namespace Friendica\Content;
+
+use Friendica\Core\Cache;
+use Friendica\Core\System;
+use Friendica\ParseUrl;
+use Friendica\Core\Config;
+use Friendica\Database\DBM;
+use dba;
+use DOMDocument;
+use DOMXPath;
+use DOMNode;
+
+require_once 'include/dba.php';
+require_once 'mod/proxy.php';
+
+/**
+ * Handles all OEmbed content fetching and replacement
+ *
+ * OEmbed is a standard used to allow an embedded representation of a URL on
+ * third party sites
+ *
+ * @see https://oembed.com
+ *
+ * @author Hypolite Petovan <mrpetovan@gmail.com>
+ */
+class OEmbed
+{
+	public static function replaceCallback($matches)
+	{
+		$embedurl = $matches[1];
+		$j = self::fetchURL($embedurl);
+		$s = self::formatObject($j);
+
+		return $s;
+	}
+
+	/**
+	 * @brief Get data from an URL to embed its content.
+	 *
+	 * @param string $embedurl The URL from which the data should be fetched.
+	 * @param bool $no_rich_type If set to true rich type content won't be fetched.
+	 *
+	 * @return bool|object Returns object with embed content or false if no embedable
+	 * 	 content exists
+	 */
+	public static function fetchURL($embedurl, $no_rich_type = false)
+	{
+		$embedurl = trim($embedurl, "'");
+		$embedurl = trim($embedurl, '"');
+
+		$a = get_app();
+
+		$condition = array('url' => normalise_link($embedurl));
+		$r = dba::select('oembed', array('content'), $condition, array('limit' => 1));
+
+		if (DBM::is_result($r)) {
+			$txt = $r["content"];
+		} else {
+			$txt = Cache::get($a->videowidth . $embedurl);
+		}
+		// These media files should now be caught in bbcode.php
+		// left here as a fallback in case this is called from another source
+
+		$noexts = array("mp3", "mp4", "ogg", "ogv", "oga", "ogm", "webm");
+		$ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION);
+
+
+		if (is_null($txt)) {
+			$txt = "";
+
+			if (!in_array($ext, $noexts)) {
+				// try oembed autodiscovery
+				$redirects = 0;
+				$html_text = fetch_url($embedurl, false, $redirects, 15, "text/*");
+				if ($html_text) {
+					$dom = @DOMDocument::loadHTML($html_text);
+					if ($dom) {
+						$xpath = new DOMXPath($dom);
+						$entries = $xpath->query("//link[@type='application/json+oembed']");
+						foreach ($entries as $e) {
+							$href = $e->getAttributeNode("href")->nodeValue;
+							$txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
+							break;
+						}
+						$entries = $xpath->query("//link[@type='text/json+oembed']");
+						foreach ($entries as $e) {
+							$href = $e->getAttributeNode("href")->nodeValue;
+							$txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
+							break;
+						}
+					}
+				}
+			}
+
+			$txt = trim($txt);
+
+			if (!$txt || $txt[0] != "{") {
+				$txt = '{"type":"error"}';
+			} else { //save in cache
+				$j = json_decode($txt);
+				if ($j->type != "error") {
+					dba::insert('oembed', array('url' => normalise_link($embedurl),
+						'content' => $txt, 'created' => datetime_convert()), true);
+				}
+
+				Cache::set($a->videowidth . $embedurl, $txt, CACHE_DAY);
+			}
+		}
+
+		$j = json_decode($txt);
+
+		if (!is_object($j)) {
+			return false;
+		}
+
+		// Always embed the SSL version
+		if (isset($j->html)) {
+			$j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"), array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
+		}
+
+		$j->embedurl = $embedurl;
+
+		// If fetching information doesn't work, then improve via internal functions
+		if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) {
+			$data = ParseUrl::getSiteinfoCached($embedurl, true, false);
+			$j->type = $data["type"];
+
+			if ($j->type == "photo") {
+				$j->url = $data["url"];
+				//$j->width = $data["images"][0]["width"];
+				//$j->height = $data["images"][0]["height"];
+			}
+
+			if (isset($data["title"])) {
+				$j->title = $data["title"];
+			}
+
+			if (isset($data["text"])) {
+				$j->description = $data["text"];
+			}
+
+			if (is_array($data["images"])) {
+				$j->thumbnail_url = $data["images"][0]["src"];
+				$j->thumbnail_width = $data["images"][0]["width"];
+				$j->thumbnail_height = $data["images"][0]["height"];
+			}
+		}
+
+		call_hooks('oembed_fetch_url', $embedurl, $j);
+
+		return $j;
+	}
+
+	public static function formatObject($j)
+	{
+		$embedurl = $j->embedurl;
+		$jhtml = self::iframe($j->embedurl, (isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null));
+		$ret = "<span class='oembed " . $j->type . "'>";
+		switch ($j->type) {
+			case "video":
+				if (isset($j->thumbnail_url)) {
+					$tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width : 200;
+					$th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height : 180;
+					// make sure we don't attempt divide by zero, fallback is a 1:1 ratio
+					$tr = (($th) ? $tw / $th : 1);
+
+					$th = 120;
+					$tw = $th * $tr;
+					$tpl = get_markup_template('oembed_video.tpl');
+					$ret.=replace_macros($tpl, array(
+						'$baseurl' => System::baseUrl(),
+						'$embedurl' => $embedurl,
+						'$escapedhtml' => base64_encode($jhtml),
+						'$tw' => $tw,
+						'$th' => $th,
+						'$turl' => $j->thumbnail_url,
+					));
+				} else {
+					$ret = $jhtml;
+				}
+				//$ret.="<br>";
+				break;
+			case "photo":
+				$ret.= "<img width='" . $j->width . "' src='" . proxy_url($j->url) . "'>";
+				break;
+			case "link":
+				break;
+			case "rich":
+				// not so safe..
+				if (!Config::get("system", "no_oembed_rich_content")) {
+					$ret.= proxy_parse_html($jhtml);
+				}
+				break;
+		}
+
+		// add link to source if not present in "rich" type
+		if ($j->type != 'rich' || !strpos($j->html, $embedurl)) {
+			$ret .= "<h4>";
+			if (isset($j->title)) {
+				if (isset($j->provider_name)) {
+					$ret .= $j->provider_name . ": ";
+				}
+
+				$embedlink = (isset($j->title)) ? $j->title : $embedurl;
+				$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
+				if (isset($j->author_name)) {
+					$ret.=" (" . $j->author_name . ")";
+				}
+			} elseif (isset($j->provider_name) || isset($j->author_name)) {
+				$embedlink = "";
+				if (isset($j->provider_name)) {
+					$embedlink .= $j->provider_name;
+				}
+
+				if (isset($j->author_name)) {
+					if ($embedlink != "") {
+						$embedlink .= ": ";
+					}
+
+					$embedlink .= $j->author_name;
+				}
+				if (trim($embedlink) == "") {
+					$embedlink = $embedurl;
+				}
+
+				$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
+			}
+			//if (isset($j->author_name)) $ret.=" by ".$j->author_name;
+			//if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
+			$ret .= "</h4>";
+		} else {
+			// add <a> for html2bbcode conversion
+			$ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
+		}
+		$ret.="</span>";
+		$ret = str_replace("\n", "", $ret);
+		return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
+	}
+
+	public static function BBCode2HTML($text)
+	{
+		$stopoembed = Config::get("system", "no_oembed");
+		if ($stopoembed == true) {
+			return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>" . t('Embedding disabled') . " : $1</i><!-- /oembed $1 -->", $text);
+		}
+		return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", ['self', 'replaceCallback'], $text);
+	}
+
+	/**
+	 * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
+	 * and replace it with [embed]url[/embed]
+	 */
+	public static function HTML2BBCode($text)
+	{
+		// start parser only if 'oembed' is in text
+		if (strpos($text, "oembed")) {
+
+			// convert non ascii chars to html entities
+			$html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
+
+			// If it doesn't parse at all, just return the text.
+			$dom = @DOMDocument::loadHTML($html_text);
+			if (!$dom) {
+				return $text;
+			}
+			$xpath = new DOMXPath($dom);
+
+			$xattr = self::buildXPath("class", "oembed");
+			$entries = $xpath->query("//span[$xattr]");
+
+			$xattr = "@rel='oembed'"; //oe_build_xpath("rel","oembed");
+			foreach ($entries as $e) {
+				$href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
+				if (!is_null($href)) {
+					$e->parentNode->replaceChild(new DOMText("[embed]" . $href . "[/embed]"), $e);
+				}
+			}
+			return self::getInnerHTML($dom->getElementsByTagName("body")->item(0));
+		} else {
+			return $text;
+		}
+	}
+
+	/**
+	 * @brief Generates the iframe HTML for an oembed attachment.
+	 *
+	 * Width and height are given by the remote, and are regularly too small for
+	 * the generated iframe.
+	 *
+	 * The width is entirely discarded for the actual width of the post, while fixed
+	 * height is used as a starting point before the inevitable resizing.
+	 *
+	 * Since the iframe is automatically resized on load, there are no need for ugly
+	 * and impractical scrollbars.
+	 *
+	 * @param string $src Original remote URL to embed
+	 * @param string $width
+	 * @param string $height
+	 * @return string formatted HTML
+	 *
+	 * @see oembed_format_object()
+	 */
+	private static function iframe($src, $width, $height)
+	{
+		$a = get_app();
+
+		if (!$height || strstr($height, '%')) {
+			$height = '200';
+		}
+		$width = '100%';
+
+		$s = System::baseUrl() . '/oembed/' . base64url_encode($src);
+		return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
+	}
+
+	/**
+	 * Generates an XPath query to select elements whose provided attribute contains
+	 * the provided value in a space-separated list.
+	 *
+	 * @brief Generates attribute search XPath string
+	 *
+	 * @param string $attr Name of the attribute to seach
+	 * @param string $value Value to search in a space-separated list
+	 * @return string
+	 */
+	private static function buildXPath($attr, $value)
+	{
+		// https://www.westhoffswelt.de/blog/2009/6/9/select-html-elements-with-more-than-one-css-class-using-xpath
+		return "contains(normalize-space(@$attr), ' $value ') or substring(normalize-space(@$attr), 1, string-length('$value') + 1) = '$value ' or substring(normalize-space(@$attr), string-length(@$attr) - string-length('$value')) = ' $value' or @$attr = '$value'";
+	}
+
+	/**
+	 * Returns the inner XML string of a provided DOMNode
+	 *
+	 * @brief Returns the inner XML string of a provided DOMNode
+	 *
+	 * @param DOMNode $node
+	 * @return string
+	 */
+	private static function getInnerHTML(DOMNode $node)
+	{
+		$innerHTML = '';
+		$children = $node->childNodes;
+		foreach ($children as $child) {
+			$innerHTML .= $child->ownerDocument->saveXML($child);
+		}
+		return $innerHTML;
+	}
+}
diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index 760b40b1d..55e2b33a0 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -606,6 +606,7 @@ class Worker
 			$exponent = 3;
 			$slope = $maxworkers / pow($maxsysload, $exponent);
 			$queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
+			$processlist = '';
 
 			if (Config::get('system', 'worker_debug')) {
 				// Create a list of queue entries grouped by their priority
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index 1b15f1c76..067a2fda7 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -662,7 +662,7 @@ class Contact extends BaseObject
 		if (!DBM::is_result($contact)) {
 			// The link could be provided as http although we stored it as https
 			$ssl_url = str_replace('http://', 'https://', $url);
-			$r = dba::select('contact', array('id', 'avatar-date'), array('`alias` IN (?, ?, ?) AND `uid` = ?', $url, normalise_link($url), $ssl_url, $uid), array('limit' => 1));
+			$r = dba::select('contact', array('id', 'avatar', 'avatar-date'), array('`alias` IN (?, ?, ?) AND `uid` = ?', $url, normalise_link($url), $ssl_url, $uid), array('limit' => 1));
 			$contact = dba::fetch($r);
 			dba::close($r);
 		}
@@ -674,7 +674,7 @@ class Contact extends BaseObject
 			$update_contact = ($contact['avatar-date'] < datetime_convert('', '', 'now -7 days'));
 
 			// We force the update if the avatar is empty
-			if ($contact['avatar'] == '') {
+			if (!x($contact, 'avatar')) {
 				$update_contact = true;
 			}
 
diff --git a/src/Model/User.php b/src/Model/User.php
index 99222f522..c6d6c044d 100644
--- a/src/Model/User.php
+++ b/src/Model/User.php
@@ -16,11 +16,11 @@ use Friendica\Model\Contact;
 use Friendica\Model\Group;
 use Friendica\Model\Photo;
 use Friendica\Object\Image;
+use Friendica\Util\Crypto;
 use dba;
 use Exception;
 
 require_once 'boot.php';
-require_once 'include/crypto.php';
 require_once 'include/dba.php';
 require_once 'include/enotify.php';
 require_once 'include/network.php';
@@ -297,7 +297,7 @@ class User
 
 		$return['password'] = $new_password;
 
-		$keys = new_keypair(4096);
+		$keys = Crypto::newKeypair(4096);
 		if ($keys === false) {
 			throw new Exception(t('SERIOUS ERROR: Generation of security keys failed.'));
 		}
@@ -306,7 +306,7 @@ class User
 		$pubkey = $keys['pubkey'];
 
 		// Create another keypair for signing/verifying salmon protocol messages.
-		$sres = new_keypair(512);
+		$sres = Crypto::newKeypair(512);
 		$sprvkey = $sres['prvkey'];
 		$spubkey = $sres['pubkey'];
 
diff --git a/src/Module/Feed.php b/src/Module/Feed.php
new file mode 100644
index 000000000..678e77e83
--- /dev/null
+++ b/src/Module/Feed.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Protocol\OStatus;
+
+/**
+ * Provides public Atom feeds
+ *
+ * Currently supported:
+ * - /feed/[nickname]/ => posts
+ * - /feed/[nickname]/posts => posts
+ * - /feed/[nickname]/comments => comments
+ * - /feed/[nickname]/replies => comments
+ * - /feed/[nickname]/activity => activity
+ *
+ * The nocache GET parameter is provided mainly for debug purposes, requires auth
+ *
+ * @brief Provides public Atom feeds
+ *
+ * @author Hypolite Petovan <mrpetovan@gmail.com>
+ */
+class Feed extends BaseModule
+{
+	public static function content()
+	{
+		$a = self::getApp();
+
+		$last_update = x($_GET, 'last_update') ? $_GET['last_update'] : '';
+		$nocache     = x($_GET, 'nocache') && local_user();
+
+		if ($a->argc < 2) {
+			http_status_exit(400);
+		}
+
+		$type = null;
+		if ($a->argc > 2) {
+			$type = $a->argv[2];
+		}
+
+		switch ($type) {
+			case 'posts':
+			case 'comments':
+			case 'activity':
+				break;
+			case 'replies':
+				$type = 'comments';
+				break;
+			default:
+				$type = 'posts';
+		}
+
+		$nickname = $a->argv[1];
+		header("Content-type: application/atom+xml");
+		echo OStatus::feed($nickname, $last_update, 10, $type, $nocache);
+		killme();
+	}
+}
diff --git a/src/Module/Oembed.php b/src/Module/Oembed.php
new file mode 100644
index 000000000..f30fb861b
--- /dev/null
+++ b/src/Module/Oembed.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Content;
+
+/**
+ * Oembed module
+ *
+ * Displays stored embed content based on a base64 hash of a remote URL
+ *
+ * Example: /oembed/aHR0cHM6Ly9...
+ *
+ * @author Hypolite Petovan <mrpetovan@gmail.com>
+ */
+class Oembed extends BaseModule
+{
+	public static function content()
+	{
+		$a = self::getApp();
+
+		// Unused form: /oembed/b2h?url=...
+		if ($a->argv[1] == 'b2h') {
+			$url = array("", trim(hex2bin($_REQUEST['url'])));
+			echo Content\OEmbed::replaceCallback($url);
+			killme();
+		}
+
+		// Unused form: /oembed/h2b?text=...
+		if ($a->argv[1] == 'h2b') {
+			$text = trim(hex2bin($_REQUEST['text']));
+			echo Content\OEmbed::HTML2BBCode($text);
+			killme();
+		}
+
+		if ($a->argc == 2) {
+			echo '<html><body>';
+			$url = base64url_decode($a->argv[1]);
+			$j = Content\OEmbed::fetchURL($url);
+
+			// workaround for media.ccc.de (and any other endpoint that return size 0)
+			if (substr($j->html, 0, 7) == "<iframe" && strstr($j->html, 'width="0"')) {
+				$j->html = '<style>html,body{margin:0;padding:0;} iframe{width:100%;height:100%;}</style>' . $j->html;
+				$j->html = str_replace('width="0"', '', $j->html);
+				$j->html = str_replace('height="0"', '', $j->html);
+			}
+			echo $j->html;
+			echo '</body></html>';
+		}
+		killme();
+	}
+}
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index 56abbb7fd..8912088cb 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -17,6 +17,7 @@ use Friendica\Database\DBM;
 use Friendica\Model\Profile;
 use Friendica\Protocol\Email;
 use Friendica\Protocol\Feed;
+use Friendica\Util\Crypto;
 use Friendica\Util\XML;
 
 use dba;
@@ -25,7 +26,6 @@ use DOMDocument;
 
 require_once 'include/dba.php';
 require_once 'include/network.php';
-require_once "include/crypto.php";
 
 /**
  * @brief This class contain functions for probing URL
@@ -330,7 +330,7 @@ class Probe
 			$data["url"] = $uri;
 		}
 
-		if ($data["photo"] != "") {
+		if (x($data, "photo")) {
 			$data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 		} else {
 			$data["photo"] = System::baseUrl().'/images/person-175.jpg';
@@ -341,7 +341,7 @@ class Probe
 				$data["name"] = $data["nick"];
 			}
 
-			if ($data["name"] == "") {
+			if (!x($data, "name")) {
 				$data["name"] = $data["url"];
 			}
 		}
@@ -944,7 +944,7 @@ class Probe
 
 				//if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
 				if (strstr($data["pubkey"], 'RSA ')) {
-					$data["pubkey"] = rsatopem($data["pubkey"]);
+					$data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
 				}
 			}
 		}
@@ -1043,7 +1043,7 @@ class Probe
 			if ($search->length > 0) {
 				$data["pubkey"] = $search->item(0)->nodeValue;
 				if (strstr($data["pubkey"], 'RSA ')) {
-					$data["pubkey"] = rsatopem($data["pubkey"]);
+					$data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
 				}
 			}
 
@@ -1133,7 +1133,7 @@ class Probe
 
 				//if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
 				if (strstr($data["pubkey"], 'RSA ')) {
-					$data["pubkey"] = rsatopem($data["pubkey"]);
+					$data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
 				}
 			}
 		}
@@ -1244,7 +1244,7 @@ class Probe
 					if (sizeof($key) >= 3) {
 						$m = base64url_decode($key[1]);
 						$e = base64url_decode($key[2]);
-						$data["pubkey"] = metopem($m, $e);
+						$data["pubkey"] = Crypto::meToPem($m, $e);
 					}
 				}
 			}
diff --git a/src/Object/Post.php b/src/Object/Post.php
index 08e7548b9..dd32fc3e3 100644
--- a/src/Object/Post.php
+++ b/src/Object/Post.php
@@ -1,7 +1,9 @@
 <?php
+
 /**
  * @file src/Object/Post.php
  */
+
 namespace Friendica\Object;
 
 use Friendica\BaseObject;
@@ -52,9 +54,9 @@ class Post extends BaseObject
 
 		$this->data = $data;
 		$this->setTemplate('wall');
-		$this->toplevel = ($this->getId() == $this->getDataValue('parent'));
+		$this->toplevel = $this->getId() == $this->getDataValue('parent');
 
-		if (is_array($_SESSION['remote'])) {
+		if (x($_SESSION, 'remote') && is_array($_SESSION['remote'])) {
 			foreach ($_SESSION['remote'] as $visitor) {
 				if ($visitor['cid'] == $this->getDataValue('contact-id')) {
 					$this->visiting = true;
@@ -63,9 +65,7 @@ class Post extends BaseObject
 			}
 		}
 
-		$this->writable = ($this->getDataValue('writable') || $this->getDataValue('self'));
-
-		$ssl_state = ((local_user()) ? true : false);
+		$this->writable = $this->getDataValue('writable') || $this->getDataValue('self');
 		$this->redirect_url = 'redir/' . $this->getDataValue('cid');
 
 		if (!$this->isToplevel()) {
@@ -75,12 +75,10 @@ class Post extends BaseObject
 		// Prepare the children
 		if (count($data['children'])) {
 			foreach ($data['children'] as $item) {
-				/*
-				 * Only add will be displayed
-				 */
+				// Only add will be displayed
 				if ($item['network'] === NETWORK_MAIL && local_user() != $item['uid']) {
 					continue;
-				} elseif (! visible_activity($item)) {
+				} elseif (!visible_activity($item)) {
 					continue;
 				}
 
@@ -145,13 +143,13 @@ class Post extends BaseObject
 			|| strlen($item['deny_cid']) || strlen($item['deny_gid']))))
 			? t('Private Message')
 			: false);
-		$shareable = ((in_array($conv->getProfileOwner(), [0, local_user()]) && ($item['private'] != 1)) ? true : false);
+		$shareable = in_array($conv->getProfileOwner(), [0, local_user()]) && $item['private'] != 1;
 
 		if (local_user() && link_compare($a->contact['url'], $item['author-link'])) {
 			if ($item["event-id"] != 0) {
-				$edpost = array("events/event/".$item['event-id'], t("Edit"));
+				$edpost = array("events/event/" . $item['event-id'], t("Edit"));
 			} else {
-				$edpost = array("editpost/".$item['id'], t("Edit"));
+				$edpost = array("editpost/" . $item['id'], t("Edit"));
 			}
 		} else {
 			$edpost = false;
@@ -170,9 +168,9 @@ class Post extends BaseObject
 
 		$filer = (($conv->getProfileOwner() == local_user()) ? t("save to folder") : false);
 
-		$diff_author    = ((link_compare($item['url'], $item['author-link'])) ? false : true);
-		$profile_name   = htmlentities(((strlen($item['author-name'])) && $diff_author) ? $item['author-name'] : $item['name']);
-		if ($item['author-link'] && (! $item['author-name'])) {
+		$diff_author = !link_compare($item['url'], $item['author-link']);
+		$profile_name = htmlentities(((strlen($item['author-name'])) && $diff_author) ? $item['author-name'] : $item['name']);
+		if ($item['author-link'] && (!$item['author-name'])) {
 			$profile_name = $item['author-link'];
 		}
 
@@ -210,39 +208,25 @@ class Post extends BaseObject
 		call_hooks('render_location', $locate);
 		$location = ((strlen($locate['html'])) ? $locate['html'] : render_location_dummy($locate));
 
-		$tags=array();
-		$hashtags = array();
-		$mentions = array();
-
-		/*foreach(explode(',',$item['tag']) as $tag){
-			$tag = trim($tag);
-			if ($tag!="") {
-				$t = bbcode($tag);
-				$tags[] = $t;
-				if($t[0] == '#')
-					$hashtags[] = $t;
-				elseif($t[0] == '@')
-					$mentions[] = $t;
-			}
-		}*/
-
 		// process action responses - e.g. like/dislike/attend/agree/whatever
 		$response_verbs = array('like', 'dislike');
 
+		$isevent = false;
+		$attend = [];
 		if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
 			$response_verbs[] = 'attendyes';
 			$response_verbs[] = 'attendno';
 			$response_verbs[] = 'attendmaybe';
 			if ($conv->isWritable()) {
 				$isevent = true;
-				$attend = array( t('I will attend'), t('I will not attend'), t('I might attend'));
+				$attend = array(t('I will attend'), t('I will not attend'), t('I might attend'));
 			}
 		}
 
 		$responses = get_responses($conv_responses, $response_verbs, $this, $item);
 
 		foreach ($response_verbs as $value => $verbs) {
-			$responses[$verbs]['output']  = ((x($conv_responses[$verbs], $item['uri'])) ? format_like($conv_responses[$verbs][$item['uri']], $conv_responses[$verbs][$item['uri'] . '-l'], $verbs, $item['uri']) : '');
+			$responses[$verbs]['output'] = x($conv_responses[$verbs], $item['uri']) ? format_like($conv_responses[$verbs][$item['uri']], $conv_responses[$verbs][$item['uri'] . '-l'], $verbs, $item['uri']) : '';
 		}
 
 		/*
@@ -256,6 +240,8 @@ class Post extends BaseObject
 			$osparkle = ' sparkle';
 		}
 
+		$tagger = '';
+
 		if ($this->isToplevel()) {
 			if ($conv->getProfileOwner() == local_user()) {
 				$isstarred = (($item['starred']) ? "starred" : "unstarred");
@@ -264,9 +250,9 @@ class Post extends BaseObject
 					'do'        => t("add star"),
 					'undo'      => t("remove star"),
 					'toggle'    => t("toggle star status"),
-					'classdo'   => (($item['starred']) ? "hidden" : ""),
-					'classundo' => (($item['starred']) ? "" : "hidden"),
-					'starred'   =>  t('starred'),
+					'classdo'   => $item['starred'] ? "hidden" : "",
+					'classundo' => $item['starred'] ? "" : "hidden",
+					'starred'   => t('starred'),
 				);
 				$r = dba::select('thread', array('ignored'), array('uid' => $item['uid'], 'iid' => $item['id']), array('limit' => 1));
 				if (DBM::is_result($r)) {
@@ -274,13 +260,12 @@ class Post extends BaseObject
 						'do'        => t("ignore thread"),
 						'undo'      => t("unignore thread"),
 						'toggle'    => t("toggle ignore status"),
-						'classdo'   => (($r['ignored']) ? "hidden" : ""),
-						'classundo' => (($r['ignored']) ? "" : "hidden"),
-						'ignored'   =>  t('ignored'),
+						'classdo'   => $r['ignored'] ? "hidden" : "",
+						'classundo' => $r['ignored'] ? "" : "hidden",
+						'ignored'   => t('ignored'),
 					);
 				}
 
-				$tagger = '';
 				if (Feature::isEnabled($conv->getProfileOwner(), 'commtag')) {
 					$tagger = array(
 						'add'   => t("add tag"),
@@ -294,11 +279,11 @@ class Post extends BaseObject
 
 		if ($conv->isWritable()) {
 			$buttons = array(
-				'like' => array( t("I like this \x28toggle\x29"), t("like")),
-				'dislike' => ((Feature::isEnabled($conv->getProfileOwner(), 'dislike')) ? array( t("I don't like this \x28toggle\x29"), t("dislike")) : ''),
+				'like'    => array(t("I like this \x28toggle\x29"), t("like")),
+				'dislike' => Feature::isEnabled($conv->getProfileOwner(), 'dislike') ? array(t("I don't like this \x28toggle\x29"), t("dislike")) : '',
 			);
 			if ($shareable) {
-				$buttons['share'] = array( t('Share this'), t('share'));
+				$buttons['share'] = array(t('Share this'), t('share'));
 			}
 		}
 
@@ -322,10 +307,10 @@ class Post extends BaseObject
 		$owner_name_e = $this->getOwnerName();
 
 		// Disable features that aren't available in several networks
-
 		/// @todo Add NETWORK_DIASPORA when it will pass this information
 		if (!in_array($item["item_network"], array(NETWORK_DFRN)) && isset($buttons["dislike"])) {
-			unset($buttons["dislike"], $isevent);
+			unset($buttons["dislike"]);
+			$isevent = false;
 			$tagger = '';
 		}
 
@@ -355,8 +340,8 @@ class Post extends BaseObject
 			'guid'            => urlencode($item['guid']),
 			'isevent'         => $isevent,
 			'attend'          => $attend,
-			'linktitle'       => sprintf(t('View %s\'s profile @ %s'), $profile_name, ((strlen($item['author-link'])) ? $item['author-link'] : $item['url'])),
-			'olinktitle'      => sprintf(t('View %s\'s profile @ %s'), htmlentities($this->getOwnerName()), ((strlen($item['owner-link'])) ? $item['owner-link'] : $item['url'])),
+			'linktitle'       => t('View %s\'s profile @ %s', $profile_name, defaults($item, 'author-link', $item['url'])),
+			'olinktitle'      => t('View %s\'s profile @ %s', htmlentities($this->getOwnerName()), defaults($item, 'owner-link', $item['url'])),
 			'to'              => t('to'),
 			'via'             => t('via'),
 			'wall'            => t('Wall-to-Wall'),
@@ -369,7 +354,7 @@ class Post extends BaseObject
 			'sparkle'         => $sparkle,
 			'title'           => $title_e,
 			'localtime'       => datetime_convert('UTC', date_default_timezone_get(), $item['created'], 'r'),
-			'ago'             => (($item['app']) ? sprintf(t('%s from %s'), relative_date($item['created']), $item['app']) : relative_date($item['created'])),
+			'ago'             => $item['app'] ? t('%s from %s', relative_date($item['created']), $item['app']) : relative_date($item['created']),
 			'app'             => $item['app'],
 			'created'         => relative_date($item['created']),
 			'lock'            => $lock,
@@ -380,12 +365,12 @@ class Post extends BaseObject
 			'owner_photo'     => $a->remove_baseurl(proxy_url($item['owner-thumb'], false, PROXY_SIZE_THUMB)),
 			'owner_name'      => htmlentities($owner_name_e),
 			'plink'           => get_plink($item),
-			'edpost'          => ((Feature::isEnabled($conv->getProfileOwner(), 'edit_posts')) ? $edpost : ''),
+			'edpost'          => Feature::isEnabled($conv->getProfileOwner(), 'edit_posts') ? $edpost : '',
 			'isstarred'       => $isstarred,
-			'star'            => ((Feature::isEnabled($conv->getProfileOwner(), 'star_posts')) ? $star : ''),
-			'ignore'          => ((Feature::isEnabled($conv->getProfileOwner(), 'ignore_posts')) ? $ignore : ''),
+			'star'            => Feature::isEnabled($conv->getProfileOwner(), 'star_posts') ? $star : '',
+			'ignore'          => Feature::isEnabled($conv->getProfileOwner(), 'ignore_posts') ? $ignore : '',
 			'tagger'          => $tagger,
-			'filer'           => ((Feature::isEnabled($conv->getProfileOwner(), 'filing')) ? $filer : ''),
+			'filer'           => Feature::isEnabled($conv->getProfileOwner(), 'filing') ? $filer : '',
 			'drop'            => $drop,
 			'vote'            => $buttons,
 			'like'            => $responses['like']['output'],
@@ -393,7 +378,7 @@ class Post extends BaseObject
 			'responses'       => $responses,
 			'switchcomment'   => t('Comment'),
 			'comment'         => $comment,
-			'previewing'      => ($conv->isPreview() ? ' preview ' : ''),
+			'previewing'      => $conv->isPreview() ? ' preview ' : '',
 			'wait'            => t('Please wait'),
 			'thread_level'    => $thread_level,
 			'edited'          => $edited,
@@ -419,7 +404,7 @@ class Post extends BaseObject
 			// Collapse
 			if (($nb_children > 2) || ($thread_level > 1)) {
 				$result['children'][0]['comment_firstcollapsed'] = true;
-				$result['children'][0]['num_comments'] = sprintf(tt('%d comment', '%d comments', $total_children), $total_children);
+				$result['children'][0]['num_comments'] = tt('%d comment', '%d comments', $total_children);
 				$result['children'][0]['hidden_comments_num'] = $total_children;
 				$result['children'][0]['hidden_comments_text'] = tt('comment', 'comments', $total_children);
 				$result['children'][0]['hide_text'] = t('show more');
@@ -480,7 +465,7 @@ class Post extends BaseObject
 			logger('[ERROR] Post::addChild : Item has no ID!!', LOGGER_DEBUG);
 			return false;
 		} elseif ($this->getChild($item->getId())) {
-			logger('[WARN] Post::addChild : Item already exists ('. $item->getId() .').', LOGGER_DEBUG);
+			logger('[WARN] Post::addChild : Item already exists (' . $item->getId() . ').', LOGGER_DEBUG);
 			return false;
 		}
 		/*
@@ -574,7 +559,7 @@ class Post extends BaseObject
 				return true;
 			}
 		}
-		logger('[WARN] Item::removeChild : Item is not a child ('. $id .').', LOGGER_DEBUG);
+		logger('[WARN] Item::removeChild : Item is not a child (' . $id . ').', LOGGER_DEBUG);
 		return false;
 	}
 
@@ -657,7 +642,7 @@ class Post extends BaseObject
 	private function setTemplate($name)
 	{
 		if (!x($this->available_templates, $name)) {
-			logger('[ERROR] Item::setTemplate : Template not available ("'. $name .'").', LOGGER_DEBUG);
+			logger('[ERROR] Item::setTemplate : Template not available ("' . $name . '").', LOGGER_DEBUG);
 			return false;
 		}
 
@@ -696,7 +681,6 @@ class Post extends BaseObject
 		if ($conv) {
 			// This will allow us to comment on wall-to-wall items owned by our friends
 			// and community forums even if somebody else wrote the post.
-
 			// bug #517 - this fixes for conversation owner
 			if ($conv->getMode() == 'profile' && $conv->getProfileOwner() == local_user()) {
 				return true;
@@ -750,14 +734,13 @@ class Post extends BaseObject
 
 		$comment_box = '';
 		$conv = $this->getThread();
-		$template = get_markup_template($this->getCommentBoxTemplate());
 		$ww = '';
 		if (($conv->getMode() === 'network') && $this->isWallToWall()) {
 			$ww = 'ww';
 		}
 
 		if ($conv->isWritable() && $this->isWritable()) {
-			$qc = $qcomment =  null;
+			$qc = $qcomment = null;
 
 			/*
 			 * Hmmm, code depending on the presence of a particular plugin?
@@ -768,18 +751,16 @@ class Post extends BaseObject
 				$qcomment = (($qc) ? explode("\n", $qc) : null);
 			}
 
-			$comment_box = replace_macros(
-				$template,
-				array(
+			$template = get_markup_template($this->getCommentBoxTemplate());
+			$comment_box = replace_macros($template, array(
 				'$return_path' => $a->query_string,
 				'$threaded'    => $this->isThreaded(),
-				// '$jsreload'    => (($conv->getMode() === 'display') ? $_SESSION['return_url'] : ''),
 				'$jsreload'    => '',
-				'$type'        => (($conv->getMode() === 'profile') ? 'wall-comment' : 'net-comment'),
+				'$type'        => $conv->getMode() === 'profile' ? 'wall-comment' : 'net-comment',
 				'$id'          => $this->getId(),
 				'$parent'      => $this->getId(),
 				'$qcomment'    => $qcomment,
-				'$profile_uid' =>  $conv->getProfileOwner(),
+				'$profile_uid' => $conv->getProfileOwner(),
 				'$mylink'      => $a->remove_baseurl($a->contact['url']),
 				'$mytitle'     => t('This is you'),
 				'$myphoto'     => $a->remove_baseurl($a->contact['thumb']),
@@ -796,9 +777,9 @@ class Post extends BaseObject
 				'$preview'     => ((Feature::isEnabled($conv->getProfileOwner(), 'preview')) ? t('Preview') : ''),
 				'$indent'      => $indent,
 				'$sourceapp'   => t($a->sourcename),
-				'$ww'          => (($conv->getMode() === 'network') ? $ww : ''),
-				'$rand_num'    => random_digits(12))
-			);
+				'$ww'          => $conv->getMode() === 'network' ? $ww : '',
+				'$rand_num'    => random_digits(12)
+			));
 		}
 
 		return $comment_box;
@@ -839,14 +820,13 @@ class Post extends BaseObject
 					$alias_linkmatch = (($this->getDataValue('alias')) && link_compare($this->getDataValue('alias'), $this->getDataValue('author-link')));
 					$owner_namematch = (($this->getDataValue('owner-name')) && $this->getDataValue('owner-name') == $this->getDataValue('author-name'));
 
-					if ((! $owner_linkmatch) && (! $alias_linkmatch) && (! $owner_namematch)) {
+					if ((!$owner_linkmatch) && (!$alias_linkmatch) && (!$owner_namematch)) {
 						// The author url doesn't match the owner (typically the contact)
 						// and also doesn't match the contact alias.
 						// The name match is a hack to catch several weird cases where URLs are
 						// all over the park. It can be tricked, but this prevents you from
 						// seeing "Bob Smith to Bob Smith via Wall-to-wall" and you know darn
 						// well that it's the same Bob Smith.
-
 						// But it could be somebody else with the same name. It just isn't highly likely.
 
 
@@ -854,8 +834,8 @@ class Post extends BaseObject
 						$this->owner_name = $this->getDataValue('owner-name');
 						$this->wall_to_wall = true;
 						// If it is our contact, use a friendly redirect link
-						if ((link_compare($this->getDataValue('owner-link'), $this->getDataValue('url')))
-							&& ($this->getDataValue('network') === NETWORK_DFRN)
+						if ($this->getDataValue('network') === NETWORK_DFRN
+							&& link_compare($this->getDataValue('owner-link'), $this->getDataValue('url'))
 						) {
 							$this->owner_url = $this->getRedirectUrl();
 						} else {
diff --git a/src/ParseUrl.php b/src/ParseUrl.php
index 9e46281ec..0c67589dd 100644
--- a/src/ParseUrl.php
+++ b/src/ParseUrl.php
@@ -5,7 +5,7 @@
  */
 namespace Friendica;
 
-use Friendica\Core\Config;
+use Friendica\Content\OEmbed;
 use Friendica\Object\Image;
 use Friendica\Util\XML;
 
@@ -15,7 +15,6 @@ use DOMDocument;
 
 require_once 'include/dba.php';
 require_once "include/network.php";
-require_once "include/oembed.php";
 
 /**
  * @brief Class with methods for extracting certain content from an url
@@ -164,7 +163,7 @@ class ParseUrl
 		$body = $data["body"];
 
 		if ($do_oembed) {
-			$oembed_data = oembed_fetch_url($url);
+			$oembed_data = OEmbed::fetchURL($url);
 
 			if (!in_array($oembed_data->type, array("error", "rich", ""))) {
 				$siteinfo["type"] = $oembed_data->type;
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 070cf598a..4d63f2b0b 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -8,6 +8,7 @@
  */
 namespace Friendica\Protocol;
 
+use Friendica\Content\OEmbed;
 use Friendica\Core\Config;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
@@ -34,7 +35,6 @@ require_once "include/tags.php";
 require_once "include/files.php";
 require_once "include/event.php";
 require_once "include/text.php";
-require_once "include/oembed.php";
 require_once "include/html2bbcode.php";
 require_once "include/bbcode.php";
 
@@ -464,7 +464,7 @@ class DFRN
 		/* get site pubkey. this could be a new installation with no site keys*/
 		$pubkey = Config::get('system', 'site_pubkey');
 		if (! $pubkey) {
-			$res = new_keypair(1024);
+			$res = Crypto::newKeypair(1024);
 			Config::set('system', 'site_prvkey', $res['prvkey']);
 			Config::set('system', 'site_pubkey', $res['pubkey']);
 		}
@@ -2503,7 +2503,7 @@ class DFRN
 
 			$item['body'] = html2bb_video($item['body']);
 
-			$item['body'] = oembed_html2bbcode($item['body']);
+			$item['body'] = OEmbed::HTML2BBCode($item['body']);
 
 			$config = \HTMLPurifier_Config::createDefault();
 			$config->set('Cache.DefinitionImpl', null);
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 15a30f532..59ca2757f 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -22,6 +22,7 @@ use Friendica\Model\Group;
 use Friendica\Model\Profile;
 use Friendica\Model\User;
 use Friendica\Network\Probe;
+use Friendica\Util\Crypto;
 use Friendica\Util\XML;
 
 use dba;
@@ -173,7 +174,7 @@ class Diaspora
 
 		$key = self::key($handle);
 
-		$verify = rsa_verify($signable_data, $sig, $key);
+		$verify = Crypto::rsaVerify($signable_data, $sig, $key);
 		if (!$verify) {
 			logger('Message did not verify. Discarding.');
 			return false;
@@ -273,7 +274,7 @@ class Diaspora
 		$author_addr = base64_decode($key_id);
 		$key = self::key($author_addr);
 
-		$verify = rsa_verify($signed_data, $signature, $key);
+		$verify = Crypto::rsaVerify($signed_data, $signature, $key);
 		if (!$verify) {
 			logger('Message did not verify. Discarding.');
 			http_status_exit(400);
@@ -406,7 +407,7 @@ class Diaspora
 			http_status_exit(400);
 		}
 
-		$verify = rsa_verify($signed_data, $signature, $key);
+		$verify = Crypto::rsaVerify($signed_data, $signature, $key);
 
 		if (!$verify) {
 			logger('Message did not verify. Discarding.');
@@ -699,7 +700,7 @@ class Diaspora
 
 			$key = self::key($msg["author"]);
 
-			if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256")) {
+			if (!Crypto::rsaVerify($signed_data, $parent_author_signature, $key, "sha256")) {
 				logger("No valid parent author signature for parent author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$parent_author_signature, LOGGER_DEBUG);
 				return false;
 			}
@@ -709,7 +710,7 @@ class Diaspora
 
 		$key = self::key($fields->author);
 
-		if (!rsa_verify($signed_data, $author_signature, $key, "sha256")) {
+		if (!Crypto::rsaVerify($signed_data, $author_signature, $key, "sha256")) {
 			logger("No valid author signature for author ".$fields->author. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$author_signature, LOGGER_DEBUG);
 			return false;
 		} else {
@@ -1432,7 +1433,7 @@ class Diaspora
 		// Check signature
 		$signed_text = 'AccountMigration:'.$old_handle.':'.$new_handle;
 		$key = self::key($old_handle);
-		if (!rsa_verify($signed_text, $signature, $key, "sha256")) {
+		if (!Crypto::rsaVerify($signed_text, $signature, $key, "sha256")) {
 			logger('No valid signature for migration.');
 			return false;
 		}
@@ -3032,7 +3033,7 @@ class Diaspora
 			$user['uprvkey'] = $user['prvkey'];
 		}
 
-		$signature = rsa_sign($signable_data, $user["uprvkey"]);
+		$signature = Crypto::rsaSign($signable_data, $user["uprvkey"]);
 		$sig = base64url_encode($signature);
 
 		$xmldata = array("me:env" => array("me:data" => $data,
@@ -3088,7 +3089,7 @@ class Diaspora
 
 		$signed_text = implode(";", $sigmsg);
 
-		return base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
+		return base64_encode(Crypto::rsaSign($signed_text, $owner["uprvkey"], "sha256"));
 	}
 
 	/**
@@ -3282,7 +3283,7 @@ class Diaspora
 		$profile = self::createProfileData($uid);
 
 		$signed_text = 'AccountMigration:'.$old_handle.':'.$profile['author'];
-		$signature = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
+		$signature = base64_encode(Crypto::rsaSign($signed_text, $owner["uprvkey"], "sha256"));
 
 		$message = array("author" => $old_handle,
 				"profile" => $profile,
diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index 757c525f9..3c284b29f 100644
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -1235,12 +1235,13 @@ class OStatus
 	/**
 	 * @brief Adds the header elements to the XML document
 	 *
-	 * @param object $doc   XML document
-	 * @param array  $owner Contact data of the poster
+	 * @param object $doc    XML document
+	 * @param array  $owner  Contact data of the poster
+	 * @param string $filter The related feed filter (activity, posts or comments)
 	 *
 	 * @return object header root element
 	 */
-	private static function addHeader($doc, $owner)
+	private static function addHeader($doc, $owner, $filter)
 	{
 		$a = get_app();
 
@@ -1256,10 +1257,16 @@ class OStatus
 		$root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 		$root->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
 
-		$attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
+		switch ($filter) {
+			case 'activity': $title = t('%s\'s timeline', $owner['name']); break;
+			case 'posts'   : $title = t('%s\'s posts'   , $owner['name']); break;
+			case 'comments': $title = t('%s\'s comments', $owner['name']); break;
+		}
+
+		$attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION);
 		XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
-		XML::addElement($doc, $root, "id", System::baseUrl()."/profile/".$owner["nick"]);
-		XML::addElement($doc, $root, "title", sprintf("%s timeline", $owner["name"]));
+		XML::addElement($doc, $root, "id", System::baseUrl() . "/profile/" . $owner["nick"]);
+		XML::addElement($doc, $root, "title", $title);
 		XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], $a->config["sitename"]));
 		XML::addElement($doc, $root, "logo", $owner["photo"]);
 		XML::addElement($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
@@ -1278,17 +1285,17 @@ class OStatus
 
 		self::hublinks($doc, $root, $owner["nick"]);
 
-		$attributes = array("href" => System::baseUrl()."/salmon/".$owner["nick"], "rel" => "salmon");
+		$attributes = array("href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon");
 		XML::addElement($doc, $root, "link", "", $attributes);
 
-		$attributes = array("href" => System::baseUrl()."/salmon/".$owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies");
+		$attributes = array("href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies");
 		XML::addElement($doc, $root, "link", "", $attributes);
 
-		$attributes = array("href" => System::baseUrl()."/salmon/".$owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention");
+		$attributes = array("href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention");
 		XML::addElement($doc, $root, "link", "", $attributes);
 
-		$attributes = array("href" => System::baseUrl()."/api/statuses/user_timeline/".$owner["nick"].".atom",
-				"rel" => "self", "type" => "application/atom+xml");
+		$attributes = array("href" => System::baseUrl() . "/api/statuses/user_timeline/" . $owner["nick"] . ".atom",
+			"rel" => "self", "type" => "application/atom+xml");
 		XML::addElement($doc, $root, "link", "", $attributes);
 
 		return $root;
@@ -2067,42 +2074,51 @@ class OStatus
 	}
 
 	/**
+	 * Creates the XML feed for a given nickname
+	 *
+	 * Supported filters:
+	 * - activity (default): all the public posts
+	 * - posts: all the public top-level posts
+	 * - comments: all the public replies
+	 *
+	 * Updates the provided last_update parameter if the result comes from the
+	 * cache or it is empty
+	 *
 	 * @brief Creates the XML feed for a given nickname
 	 *
-	 * @param object  $a           The application class
 	 * @param string  $owner_nick  Nickname of the feed owner
 	 * @param string  $last_update Date of the last update
 	 * @param integer $max_items   Number of maximum items to fetch
+	 * @param string  $filter      Feed items filter (activity, posts or comments)
+	 * @param boolean $nocache     Wether to bypass caching
 	 *
 	 * @return string XML feed
 	 */
-	public static function feed(App $a, $owner_nick, &$last_update, $max_items = 300)
+	public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
 	{
 		$stamp = microtime(true);
 
-		$cachekey = "ostatus:feed:".$owner_nick.":".$last_update;
+		$cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
 
 		$previous_created = $last_update;
 
 		$result = Cache::get($cachekey);
-		if (!is_null($result)) {
-			logger('Feed duration: '.number_format(microtime(true) - $stamp, 3).' - '.$owner_nick.' - '.$previous_created.' (cached)', LOGGER_DEBUG);
+		if (!$nocache && !is_null($result)) {
+			logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', LOGGER_DEBUG);
 			$last_update = $result['last_update'];
 			return $result['feed'];
 		}
 
-		$r = q(
+		$owner = dba::fetch_first(
 			"SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
 				FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
-				WHERE `contact`.`self` AND `user`.`nickname` = '%s' LIMIT 1",
-			dbesc($owner_nick)
+				WHERE `contact`.`self` AND `user`.`nickname` = ? LIMIT 1",
+			$owner_nick
 		);
-		if (!DBM::is_result($r)) {
+		if (!DBM::is_result($owner)) {
 			return;
 		}
 
-		$owner = $r[0];
-
 		if (!strlen($last_update)) {
 			$last_update = 'now -30 days';
 		}
@@ -2110,23 +2126,40 @@ class OStatus
 		$check_date = datetime_convert('UTC', 'UTC', $last_update, 'Y-m-d H:i:s');
 		$authorid = Contact::getIdForURL($owner["url"], 0);
 
+		$sql_extra = '';
+		if ($filter === 'posts') {
+			$sql_extra .= ' AND `item`.`id` = `item`.`parent` ';
+		}
+
+		if ($filter === 'comments') {
+			$sql_extra .= sprintf(" AND `item`.`object-type` = '%s' ", dbesc(ACTIVITY_OBJ_COMMENT));
+		}
+
 		$items = q(
 			"SELECT `item`.*, `item`.`id` AS `item_id` FROM `item` USE INDEX (`uid_contactid_created`)
 				STRAIGHT_JOIN `thread` ON `thread`.`iid` = `item`.`parent`
-				WHERE `item`.`uid` = %d AND `item`.`contact-id` = %d AND
-					`item`.`author-id` = %d AND `item`.`created` > '%s' AND
-					NOT `item`.`deleted` AND NOT `item`.`private` AND
-					`thread`.`network` IN ('%s', '%s')
+				WHERE `item`.`uid` = %d
+				AND `item`.`contact-id` = %d
+				AND `item`.`author-id` = %d
+				AND `item`.`created` > '%s'
+				AND NOT `item`.`deleted`
+				AND NOT `item`.`private`
+				AND `thread`.`network` IN ('%s', '%s')
+				$sql_extra
 				ORDER BY `item`.`created` DESC LIMIT %d",
-			intval($owner["uid"]), intval($owner["id"]),
-			intval($authorid), dbesc($check_date),
-			dbesc(NETWORK_OSTATUS), dbesc(NETWORK_DFRN), intval($max_items)
+			intval($owner["uid"]),
+			intval($owner["id"]),
+			intval($authorid),
+			dbesc($check_date),
+			dbesc(NETWORK_OSTATUS),
+			dbesc(NETWORK_DFRN),
+			intval($max_items)
 		);
 
 		$doc = new DOMDocument('1.0', 'utf-8');
 		$doc->formatOutput = true;
 
-		$root = self::addHeader($doc, $owner);
+		$root = self::addHeader($doc, $owner, $filter);
 
 		foreach ($items as $item) {
 			if (Config::get('system', 'ostatus_debug')) {
@@ -2145,7 +2178,7 @@ class OStatus
 		$msg = array('feed' => $feeddata, 'last_update' => $last_update);
 		Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
 
-		logger('Feed duration: '.number_format(microtime(true) - $stamp, 3).' - '.$owner_nick.' - '.$previous_created, LOGGER_DEBUG);
+		logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, LOGGER_DEBUG);
 
 		return $feeddata;
 	}
diff --git a/src/Protocol/Salmon.php b/src/Protocol/Salmon.php
index d26a3229d..2bf86f0e3 100644
--- a/src/Protocol/Salmon.php
+++ b/src/Protocol/Salmon.php
@@ -5,10 +5,9 @@
 namespace Friendica\Protocol;
 
 use Friendica\Network\Probe;
+use Friendica\Util\Crypto;
 use Friendica\Util\XML;
 
-require_once 'include/crypto.php';
-
 /**
  * @brief Salmon Protocol class
  * The Salmon Protocol is a message exchange protocol running over HTTP designed to decentralize commentary
@@ -107,18 +106,18 @@ class Salmon
 		$data_type = 'application/atom+xml';
 		$encoding  = 'base64url';
 		$algorithm = 'RSA-SHA256';
-		$keyhash   = base64url_encode(hash('sha256', salmon_key($owner['spubkey'])), true);
+		$keyhash   = base64url_encode(hash('sha256', self::salmonKey($owner['spubkey'])), true);
 
 		$precomputed = '.' . base64url_encode($data_type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($algorithm);
 
 		// GNU Social format
-		$signature   = base64url_encode(rsa_sign($data . $precomputed, $owner['sprvkey']));
+		$signature   = base64url_encode(Crypto::rsaSign($data . $precomputed, $owner['sprvkey']));
 
 		// Compliant format
-		$signature2  = base64url_encode(rsa_sign(str_replace('=', '', $data . $precomputed), $owner['sprvkey']));
+		$signature2  = base64url_encode(Crypto::rsaSign(str_replace('=', '', $data . $precomputed), $owner['sprvkey']));
 
 		// Old Status.net format
-		$signature3  = base64url_encode(rsa_sign($data, $owner['sprvkey']));
+		$signature3  = base64url_encode(Crypto::rsaSign($data, $owner['sprvkey']));
 
 		// At first try the non compliant method that works for GNU Social
 		$xmldata = array("me:env" => array("me:data" => $data,
@@ -201,4 +200,14 @@ class Salmon
 
 		return (($return_code >= 200) && ($return_code < 300)) ? 0 : 1;
 	}
+
+	/**
+	 * @param string $pubkey public key
+	 * @return string
+	 */
+	public static function salmonKey($pubkey)
+	{
+		Crypto::pemToMe($pubkey, $m, $e);
+		return 'RSA' . '.' . base64url_encode($m, true) . '.' . base64url_encode($e, true);
+	}
 }
diff --git a/src/Util/Crypto.php b/src/Util/Crypto.php
new file mode 100644
index 000000000..adee8cd60
--- /dev/null
+++ b/src/Util/Crypto.php
@@ -0,0 +1,252 @@
+<?php
+/**
+ * @file src/Util/Crypto.php
+ */
+namespace Friendica\Util;
+
+use Friendica\Core\Config;
+use ASN_BASE;
+use ASNValue;
+
+require_once 'library/ASNValue.class.php';
+require_once 'library/asn1.php';
+
+/**
+ * @brief Crypto class
+ */
+class Crypto
+{
+	// supported algorithms are 'sha256', 'sha1'
+	/**
+	 * @param string $data data
+	 * @param string $key  key
+	 * @param string $alg  algorithm
+	 * @return string
+	 */
+	public static function rsaSign($data, $key, $alg = 'sha256')
+	{
+		openssl_sign($data, $sig, $key, (($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
+		return $sig;
+	}
+
+	/**
+	 * @param string $data data
+	 * @param string $sig  signature
+	 * @param string $key  key
+	 * @param string $alg  algorithm
+	 * @return boolean
+	 */
+	public static function rsaVerify($data, $sig, $key, $alg = 'sha256')
+	{
+		return openssl_verify($data, $sig, $key, (($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
+	}
+
+	/**
+	 * @param string $Der     der formatted string
+	 * @param string $Private key type optional, default false
+	 * @return string
+	 */
+	private static function DerToPem($Der, $Private = false)
+	{
+		//Encode:
+		$Der = base64_encode($Der);
+		//Split lines:
+		$lines = str_split($Der, 65);
+		$body = implode("\n", $lines);
+		//Get title:
+		$title = $Private ? 'RSA PRIVATE KEY' : 'PUBLIC KEY';
+		//Add wrapping:
+		$result = "-----BEGIN {$title}-----\n";
+		$result .= $body . "\n";
+		$result .= "-----END {$title}-----\n";
+
+		return $result;
+	}
+
+	/**
+	 * @param string $Der der formatted string
+	 * @return string
+	 */
+	private static function DerToRsa($Der)
+	{
+		//Encode:
+		$Der = base64_encode($Der);
+		//Split lines:
+		$lines = str_split($Der, 64);
+		$body = implode("\n", $lines);
+		//Get title:
+		$title = 'RSA PUBLIC KEY';
+		//Add wrapping:
+		$result = "-----BEGIN {$title}-----\n";
+		$result .= $body . "\n";
+		$result .= "-----END {$title}-----\n";
+
+		return $result;
+	}
+
+	/**
+	 * @param string $Modulus        modulo
+	 * @param string $PublicExponent exponent
+	 * @return string
+	 */
+	private static function pkcs8Encode($Modulus, $PublicExponent)
+	{
+		//Encode key sequence
+		$modulus = new ASNValue(ASNValue::TAG_INTEGER);
+		$modulus->SetIntBuffer($Modulus);
+		$publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
+		$publicExponent->SetIntBuffer($PublicExponent);
+		$keySequenceItems = array($modulus, $publicExponent);
+		$keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
+		$keySequence->SetSequence($keySequenceItems);
+		//Encode bit string
+		$bitStringValue = $keySequence->Encode();
+		$bitStringValue = chr(0x00) . $bitStringValue; //Add unused bits byte
+		$bitString = new ASNValue(ASNValue::TAG_BITSTRING);
+		$bitString->Value = $bitStringValue;
+		//Encode body
+		$bodyValue = "\x30\x0d\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01\x05\x00" . $bitString->Encode();
+		$body = new ASNValue(ASNValue::TAG_SEQUENCE);
+		$body->Value = $bodyValue;
+		//Get DER encoded public key:
+		$PublicDER = $body->Encode();
+		return $PublicDER;
+	}
+
+	/**
+	 * @param string $Modulus        modulo
+	 * @param string $PublicExponent exponent
+	 * @return string
+	 */
+	private static function pkcs1Encode($Modulus, $PublicExponent)
+	{
+		//Encode key sequence
+		$modulus = new ASNValue(ASNValue::TAG_INTEGER);
+		$modulus->SetIntBuffer($Modulus);
+		$publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
+		$publicExponent->SetIntBuffer($PublicExponent);
+		$keySequenceItems = array($modulus, $publicExponent);
+		$keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
+		$keySequence->SetSequence($keySequenceItems);
+		//Encode bit string
+		$bitStringValue = $keySequence->Encode();
+		return $bitStringValue;
+	}
+
+	/**
+	 * @param string $m modulo
+	 * @param string $e exponent
+	 * @return string
+	 */
+	public static function meToPem($m, $e)
+	{
+		$der = self::pkcs8Encode($m, $e);
+		$key = self::DerToPem($der, false);
+		return $key;
+	}
+
+	/**
+	 * @param string $key key
+	 * @param string $m   modulo reference
+	 * @param object $e   exponent reference
+	 * @return void
+	 */
+	private static function pubRsaToMe($key, &$m, &$e)
+	{
+		$lines = explode("\n", $key);
+		unset($lines[0]);
+		unset($lines[count($lines)]);
+		$x = base64_decode(implode('', $lines));
+
+		$r = ASN_BASE::parseASNString($x);
+
+		$m = base64url_decode($r[0]->asnData[0]->asnData);
+		$e = base64url_decode($r[0]->asnData[1]->asnData);
+	}
+
+	/**
+	 * @param string $key key
+	 * @return string
+	 */
+	public static function rsaToPem($key)
+	{
+		self::pubRsaToMe($key, $m, $e);
+		return self::meToPem($m, $e);
+	}
+
+	/**
+	 * @param string $key key
+	 * @return string
+	 */
+	private static function pemToRsa($key)
+	{
+		self::pemToMe($key, $m, $e);
+		return self::meToRsa($m, $e);
+	}
+
+	/**
+	 * @param string $key key
+	 * @param string $m   modulo reference
+	 * @param string $e   exponent reference
+	 * @return void
+	 */
+	public static function pemToMe($key, &$m, &$e)
+	{
+		$lines = explode("\n", $key);
+		unset($lines[0]);
+		unset($lines[count($lines)]);
+		$x = base64_decode(implode('', $lines));
+
+		$r = ASN_BASE::parseASNString($x);
+
+		$m = base64url_decode($r[0]->asnData[1]->asnData[0]->asnData[0]->asnData);
+		$e = base64url_decode($r[0]->asnData[1]->asnData[0]->asnData[1]->asnData);
+	}
+
+	/**
+	 * @param string $m modulo
+	 * @param string $e exponent
+	 * @return string
+	 */
+	private static function meToRsa($m, $e)
+	{
+		$der = self::pkcs1Encode($m, $e);
+		$key = self::DerToRsa($der);
+		return $key;
+	}
+
+	/**
+	 * @param integer $bits number of bits
+	 * @return mixed
+	 */
+	public static function newKeypair($bits)
+	{
+		$openssl_options = array(
+			'digest_alg'       => 'sha1',
+			'private_key_bits' => $bits,
+			'encrypt_key'      => false
+		);
+
+		$conf = Config::get('system', 'openssl_conf_file');
+		if ($conf) {
+			$openssl_options['config'] = $conf;
+		}
+		$result = openssl_pkey_new($openssl_options);
+
+		if (empty($result)) {
+			logger('new_keypair: failed');
+			return false;
+		}
+
+		// Get private key
+		$response = array('prvkey' => '', 'pubkey' => '');
+
+		openssl_pkey_export($result, $response['prvkey']);
+
+		// Get public key
+		$pkey = openssl_pkey_get_details($result);
+		$response['pubkey'] = $pkey["key"];
+
+		return $response;
+	}
+}
diff --git a/src/Worker/PubSubPublish.php b/src/Worker/PubSubPublish.php
index e2ecedbdf..3af206e80 100644
--- a/src/Worker/PubSubPublish.php
+++ b/src/Worker/PubSubPublish.php
@@ -52,7 +52,7 @@ class PubSubPublish {
 		logger("Generate feed of user ".$rr['nickname']." to ".$rr['callback_url']." - last updated ".$rr['last_update'], LOGGER_DEBUG);
 
 		$last_update = $rr['last_update'];
-		$params = OStatus::feed($a, $rr['nickname'], $last_update);
+		$params = OStatus::feed($rr['nickname'], $last_update);
 
 		if (!$params) {
 			return;
diff --git a/view/templates/shared_content.tpl b/view/templates/shared_content.tpl
index d3df6321a..ee78f842c 100644
--- a/view/templates/shared_content.tpl
+++ b/view/templates/shared_content.tpl
@@ -5,7 +5,6 @@
 			<img src="{{$avatar}}" height="32" width="32">
 			</a>
 		{{/if}}
-		{{*<span><a href="{{$profile}}" target="_blank" class="shared-wall-item-name">{{$author}}</a> wrote the following <a href="{{$link}}" target="_blank">post</a>{{$reldate}}:</span>*}}
 		<div><a href="{{$profile}}" target="_blank" class="shared-wall-item-name"><span class="shared-author">{{$author}}</span></a></div>
 		<div class="shared-wall-item-ago"><small><a href="{{$link}}" target="_blank"><span class="shared-time">{{$posted}}</a></a></small></div>
 	</div>
diff --git a/view/theme/frio/style.php b/view/theme/frio/style.php
index 04379b244..a7b8c8a9d 100644
--- a/view/theme/frio/style.php
+++ b/view/theme/frio/style.php
@@ -8,7 +8,7 @@ $schemecss = "";
 $schemecssfile = false;
 $scheme_modified = 0;
 
-if (! $a->install) {
+if ($a->module !== 'install') {
 	// Get the UID of the profile owner.
 	$uid = get_theme_uid();
 	if ($uid) {
@@ -57,7 +57,7 @@ if (! $a->install) {
 // Setting $schema to '' wasn't working for some reason, so we'll check it's
 // not --- like the mobile theme does instead.
 // Allow layouts to over-ride the schema.
-if ($_REQUEST['schema']) {
+if (x($_REQUEST, 'schema')) {
 	$schema = $_REQUEST['schema'];
 }
 
@@ -103,7 +103,7 @@ $contentbg_transp = ((isset($contentbg_transp) && $contentbg_transp != "") ? $co
 // Calculate some colors in dependance of existing colors.
 // Some colors are calculated to don't have too many selection
 // fields in the theme settings.
-if (! $menu_background_hover_color) {
+if (!isset($menu_background_hover_color)) {
 	$mbhc = new Color($nav_bg);
 	$mcolor = $mbhc->getHex();
 
@@ -115,7 +115,7 @@ if (! $menu_background_hover_color) {
 		$menu_background_hover_color = '#' . $mbhc->lighten(5);
 	}
 }
-if (! $nav_icon_hover_color) {
+if (!isset($nav_icon_hover_color)) {
 	$nihc = new Color($nav_bg);
 
 	if ($nihc->isLight()) {
@@ -124,7 +124,7 @@ if (! $nav_icon_hover_color) {
 		$nav_icon_hover_color = '#' . $nihc->lighten(10);
 	}
 }
-if (! $link_hover_color) {
+if (!isset($link_hover_color)) {
 	$lhc = new Color($link_color);
 	$lcolor = $lhc->getHex();
 
@@ -137,6 +137,9 @@ if (! $link_hover_color) {
 }
 
 // Convert $bg_image_options into css.
+if (!isset($bg_image_option)) {
+	$bg_image_option = null;
+}
 switch ($bg_image_option) {
 	case "stretch":
 		$background_size_img = "100%";
diff --git a/view/theme/frio/templates/searchbox.tpl b/view/theme/frio/templates/searchbox.tpl
index 7d6fbef65..d95d1a411 100644
--- a/view/theme/frio/templates/searchbox.tpl
+++ b/view/theme/frio/templates/searchbox.tpl
@@ -47,8 +47,10 @@ Some parts of this template will be moved by js to other places (see theme.js) -
 		</form>
 	</div>
 	{{* This form is inserted as experiment to move the search-save button to the second navbar with js *}}
+	{{if $savedsearch}}
 	<form id="search-save-form" action="{{$action_url}}" method="get" >
 		<input type="hidden" name="search" value="{{$s}}" />
 		<button class="btn btn-primary btn-sm btn-main pull-right" type="submit" name="save" id="search-save" value="{{$save_label}}"><i class="fa fa-floppy-o fa-2x" aria-hidden="true"></i></button>
 	</form>
+	{{/if}}
 </div>
diff --git a/view/theme/frio/theme.php b/view/theme/frio/theme.php
index 8b1713026..c529b1f98 100644
--- a/view/theme/frio/theme.php
+++ b/view/theme/frio/theme.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * Name: frio
  * Description: Bootstrap V3 theme. The theme is currently under construction, so it is far from finished. For further information have a look at the <a href="https://github.com/friendica/friendica/tree/develop/view/theme/frio/README.md">ReadMe</a>.
@@ -18,8 +19,8 @@ $frio = "view/theme/frio";
 
 global $frio;
 
-function frio_init(App $a) {
-
+function frio_init(App $a)
+{
 	// disable the events module link in the profile tab
 	$a->theme_events_in_profile = false;
 
@@ -35,19 +36,21 @@ function frio_init(App $a) {
 
 	// if the device is a mobile device set js is_mobile
 	// variable so the js scripts can use this information
-	if($a->is_mobile || $a->is_tablet) {
+	if ($a->is_mobile || $a->is_tablet) {
 		$a->page["htmlhead"] .= <<< EOT
 			<script type="text/javascript">
 				var is_mobile = 1;
 			</script>
 EOT;
-}
+	}
 
-	if ($style == "")
+	if ($style == "") {
 		$style = Config::get('frio', 'style');
+	}
 }
 
-function frio_install() {
+function frio_install()
+{
 	register_hook('prepare_body_final', 'view/theme/frio/theme.php', 'frio_item_photo_links');
 	register_hook('item_photo_menu', 'view/theme/frio/theme.php', 'frio_item_photo_menu');
 	register_hook('contact_photo_menu', 'view/theme/frio/theme.php', 'frio_contact_photo_menu');
@@ -58,7 +61,8 @@ function frio_install() {
 	logger("installed theme frio");
 }
 
-function frio_uninstall() {
+function frio_uninstall()
+{
 	unregister_hook('prepare_body_final', 'view/theme/frio/theme.php', 'frio_item_photo_links');
 	unregister_hook('item_photo_menu', 'view/theme/frio/theme.php', 'frio_item_photo_menu');
 	unregister_hook('contact_photo_menu', 'view/theme/frio/theme.php', 'frio_contact_photo_menu');
@@ -68,6 +72,7 @@ function frio_uninstall() {
 
 	logger("uninstalled theme frio");
 }
+
 /**
  * @brief Replace friendica photo links hook
  *
@@ -86,19 +91,19 @@ function frio_item_photo_links(App $a, &$body_info)
 	$occurence = 1;
 	$p = bb_find_open_close($body_info['html'], "<a", ">");
 
-	while($p !== false && ($occurence++ < 500)) {
+	while ($p !== false && ($occurence++ < 500)) {
 		$link = substr($body_info['html'], $p['start'], $p['end'] - $p['start']);
 		$matches = array();
 
 		preg_match("/\/photos\/[\w]+\/image\/([\w]+)/", $link, $matches);
-		if($matches) {
+		if ($matches) {
 			// Replace the link for the photo's page with a direct link to the photo itself
 			$newlink = str_replace($matches[0], "/photo/{$matches[1]}", $link);
 
 			// Add a "quiet" parameter to any redir links to prevent the "XX welcomes YY" info boxes
 			$newlink = preg_replace("/href=\"([^\"]+)\/redir\/([^\"]+)&url=([^\"]+)\"/", 'href="$1/redir/$2&quiet=1&url=$3"', $newlink);
 
-			 // Having any arguments to the link for Colorbox causes it to fetch base64 code instead of the image
+			// Having any arguments to the link for Colorbox causes it to fetch base64 code instead of the image
 			$newlink = preg_replace("/\/[?&]zrl=([^&\"]+)/", '', $newlink);
 
 			$body_info['html'] = str_replace($link, $newlink, $body_info['html']);
@@ -118,15 +123,14 @@ function frio_item_photo_links(App $a, &$body_info)
  * @param App $a Unused but required by the hook definition
  * @param array $arr Contains item data and the original photo_menu
  */
-function frio_item_photo_menu(App $a, &$arr) {
-
-	foreach($arr["menu"] as $k =>$v) {
-		if(strpos($v,'poke/?f=&c=') === 0 || strpos($v,'message/new/') === 0) {
+function frio_item_photo_menu(App $a, &$arr)
+{
+	foreach ($arr["menu"] as $k => $v) {
+		if (strpos($v, 'poke/?f=&c=') === 0 || strpos($v, 'message/new/') === 0) {
 			$v = "javascript:addToModal('" . $v . "'); return false;";
 			$arr["menu"][$k] = $v;
 		}
 	}
-	$args = array('item' => $item, 'menu' => $menu);
 }
 
 /**
@@ -141,12 +145,8 @@ function frio_item_photo_menu(App $a, &$arr) {
  * @param App $a The app data
  * @param array $args Contains contact data and the original photo_menu
  */
-function frio_contact_photo_menu(App $a, &$args){
-
-	$pokelink = "";
-	$pmlink = "";
-	$cid = "";
-
+function frio_contact_photo_menu(App $a, &$args)
+{
 	$cid = $args["contact"]["id"];
 	$pokelink = $args["menu"]["poke"][1];
 	$pmlink = $args["menu"]["pm"][1];
@@ -160,8 +160,8 @@ function frio_contact_photo_menu(App $a, &$args){
 	// The value for opening in a new tab is e.g. when
 	// $args["menu"]["status"][2] is true. If the value of the [2] key is true
 	// and if it's a friendica contact we set it to false
-	foreach($args["menu"] as $k =>$v) {
-		if($k === "status" || $k === "profile" || $k === "photos") {
+	foreach ($args["menu"] as $k => $v) {
+		if ($k === "status" || $k === "profile" || $k === "photos") {
 			$v[2] = (($args["contact"]["network"] === "dfrn") ? false : true);
 			$args["menu"][$k][2] = $v[2];
 		}
@@ -170,13 +170,13 @@ function frio_contact_photo_menu(App $a, &$args){
 	// Add to pm and poke links a new key with the value 'modal'.
 	// Later we can make conditions in the corresponing templates (e.g.
 	// contact_template.tpl)
-	if(strpos($pokelink,'poke/?f=&c='. $cid) !== false)
+	if (strpos($pokelink, 'poke/?f=&c=' . $cid) !== false) {
 		$args["menu"]["poke"][3] = "modal";
+	}
 
-	if(strpos($pmlink,'message/new/' . $cid) !== false)
+	if (strpos($pmlink, 'message/new/' . $cid) !== false) {
 		$args["menu"]["pm"][3] = "modal";
-
-	$args = array('contact' => $contact, 'menu' => &$menu);
+	}
 }
 
 /**
@@ -193,11 +193,13 @@ function frio_contact_photo_menu(App $a, &$args){
  * @param App $a The App class
  * @param array $nav The original nav menu
  */
-function frio_remote_nav($a,&$nav) {
+function frio_remote_nav($a, &$nav)
+{
 	// get the homelink from $_XSESSION
 	$homelink = get_my_url();
-	if(! $homelink)
-		$homelink = ((x($_SESSION,'visitor_home')) ? $_SESSION['visitor_home'] : '');
+	if (!$homelink) {
+		$homelink = defaults($_SESSION, 'visitor_home', '');
+	}
 
 	// split up the url in it's parts (protocol,domain/directory, /profile/, nickname
 	// I'm not familiar with regex, so someone might find a better solutionen
@@ -213,7 +215,7 @@ function frio_remote_nav($a,&$nav) {
 	// And construct a webbie (e.g. mickey@friendica.domain.com for the search in gcontact
 	// We use the webbie for search in gcontact because we don't know if gcontact table stores
 	// the right value if its http or https protocol
-	if(count($url_parts)) {
+	if (count($url_parts)) {
 		$server_url = $url_parts[1] . $url_parts[2];
 		$webbie = $url_parts[4] . '@' . $url_parts[2];
 	}
@@ -228,11 +230,9 @@ function frio_remote_nav($a,&$nav) {
 
 		$r[0]['photo'] = (DBM::is_result($r) ? $a->remove_baseurl($r[0]['micro']) : "images/person-48.jpg");
 		$r[0]['name'] = $a->user['username'];
-
 	} elseif (!local_user() && remote_user()) {
 		$r = q("SELECT `name`, `nick`, `micro` AS `photo` FROM `contact` WHERE `id` = %d", intval(remote_user()));
 		$nav['remote'] = t("Guest");
-
 	} elseif (get_my_url()) {
 		$r = q("SELECT `name`, `nick`, `photo` FROM `gcontact`
 				WHERE `addr` = '%s' AND `network` = 'dfrn'",
@@ -243,18 +243,18 @@ function frio_remote_nav($a,&$nav) {
 	}
 
 	if (DBM::is_result($r)) {
-			$nav['userinfo'] = array(
-				'icon' => (DBM::is_result($r) ? $r[0]['photo'] : "images/person-48.jpg"),
-				'name' => $r[0]['name'],
-			);
-		}
+		$nav['userinfo'] = array(
+			'icon' => (DBM::is_result($r) ? $r[0]['photo'] : "images/person-48.jpg"),
+			'name' => $r[0]['name'],
+		);
+	}
 
 	if (!local_user() && !empty($server_url)) {
 		$nav['logout'] = Array($server_url . '/logout', t('Logout'), "", t('End this session'));
 
 		// user menu
 		$nav['usermenu'][] = Array($server_url . '/profile/' . $a->user['nickname'], t('Status'), "", t('Your posts and conversations'));
-		$nav['usermenu'][] = Array($server_url . '/profile/' . $a->user['nickname']. '?tab=profile', t('Profile'), "", t('Your profile page'));
+		$nav['usermenu'][] = Array($server_url . '/profile/' . $a->user['nickname'] . '?tab=profile', t('Profile'), "", t('Your profile page'));
 		$nav['usermenu'][] = Array($server_url . '/photos/' . $a->user['nickname'], t('Photos'), "", t('Your photos'));
 		$nav['usermenu'][] = Array($server_url . '/videos/' . $a->user['nickname'], t('Videos'), "", t('Your videos'));
 		$nav['usermenu'][] = Array($server_url . '/events/', t('Events'), "", t('Your events'));
@@ -263,11 +263,12 @@ function frio_remote_nav($a,&$nav) {
 		$nav['network'] = array($server_url . '/network', t('Network'), "", t('Conversations from your friends'));
 		$nav['events'] = Array($server_url . '/events', t('Events'), "", t('Events and Calendar'));
 		$nav['messages'] = array($server_url . '/message', t('Messages'), "", t('Private mail'));
-		$nav['settings'] = array($server_url . '/settings', t('Settings'),"", t('Account settings'));
-		$nav['contacts'] = array($server_url . '/contacts', t('Contacts'),"", t('Manage/edit friends and contacts'));
+		$nav['settings'] = array($server_url . '/settings', t('Settings'), "", t('Account settings'));
+		$nav['contacts'] = array($server_url . '/contacts', t('Contacts'), "", t('Manage/edit friends and contacts'));
 		$nav['sitename'] = $a->config['sitename'];
 	}
 }
+
 /**
  * @brief: Search for contacts
  *
@@ -281,10 +282,11 @@ function frio_remote_nav($a,&$nav) {
  * @param App $a The app data @TODO Unused
  * @param array $results The array with the originals from acl_lookup()
  */
-function frio_acl_lookup(App $a, &$results) {
-	require_once("mod/contacts.php");
+function frio_acl_lookup(App $a, &$results)
+{
+	require_once 'mod/contacts.php';
 
-	$nets = ((x($_GET,"nets")) ? notags(trim($_GET["nets"])) : "");
+	$nets = x($_GET, "nets") ? notags(trim($_GET["nets"])) : "";
 
 	// we introduce a new search type, r should do the same query like it's
 	// done in /mod/contacts for connections
@@ -295,17 +297,17 @@ function frio_acl_lookup(App $a, &$results) {
 			$search_txt = dbesc(protect_sprintf(preg_quote($search)));
 			$searching = true;
 		}
-		$sql_extra .= (($searching) ? " AND (`attag` LIKE '%%".dbesc($search_txt)."%%' OR `name` LIKE '%%".dbesc($search_txt)."%%' OR `nick` LIKE '%%".dbesc($search_txt)."%%') " : "");
+		$sql_extra = '';
+		if ($searching) {
+			$sql_extra .= " AND (`attag` LIKE '%%" . dbesc($search_txt) . "%%' OR `name` LIKE '%%" . dbesc($search_txt) . "%%' OR `nick` LIKE '%%" . dbesc($search_txt) . "%%') ";
+		}
 
 		if ($nets) {
 			$sql_extra .= sprintf(" AND network = '%s' ", dbesc($nets));
 		}
 
-		$sql_extra2 = ((($sort_type > 0) && ($sort_type <= CONTACT_IS_FRIEND)) ? sprintf(" AND `rel` = %d ",intval($sort_type)) : '');
-
-
 		$r = q("SELECT COUNT(*) AS `total` FROM `contact`
-			WHERE `uid` = %d AND NOT `self` AND NOT `pending` $sql_extra $sql_extra2 ",
+			WHERE `uid` = %d AND NOT `self` AND NOT `pending` $sql_extra ",
 			intval($_SESSION['uid']));
 		if (DBM::is_result($r)) {
 			$total = $r[0]["total"];
@@ -313,7 +315,7 @@ function frio_acl_lookup(App $a, &$results) {
 
 		$sql_extra3 = unavailable_networks();
 
-		$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND NOT `self` AND NOT `pending` $sql_extra $sql_extra2 $sql_extra3 ORDER BY `name` ASC LIMIT 100 ",
+		$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND NOT `self` AND NOT `pending` $sql_extra $sql_extra3 ORDER BY `name` ASC LIMIT 100 ",
 			intval($_SESSION['uid'])
 		);
 
@@ -332,19 +334,19 @@ function frio_acl_lookup(App $a, &$results) {
 
 /**
  * @brief Manipulate the data of the item
- * 
+ *
  * At the moment we use this function to add some own stuff to the item menu
- * 
+ *
  * @param App $a App $a The app data
  * @param array $arr Array with the item and the item actions<br>
  *     'item' => Array with item data<br>
  *     'output' => Array with item actions<br>
  */
-function frio_display_item(App $a,&$arr) {
-
+function frio_display_item(App $a, &$arr)
+{
 	// Add subthread to the item menu
 	$subthread = array();
-	if ((local_user()) && local_user() == $arr['item']['uid'] && $arr['item']['parent'] == $arr['item']['id'] && (! $arr['item']['self'])) {
+	if (local_user() == $arr['item']['uid'] && $arr['item']['parent'] == $arr['item']['id'] && !$arr['item']['self']) {
 		$subthread = array(
 			'menu'   => 'follow_thread',
 			'title'  => t('Follow Thread'),