diff --git a/boot.php b/boot.php
index 116c712a83..b2d9f01927 100644
--- a/boot.php
+++ b/boot.php
@@ -1,6 +1,6 @@
 <?php
-/** @file boot.php
- *
+/**
+ * @file_tag_unsave_file boot.php
  * This file defines some global constants and includes the central App class.
  */
 
@@ -24,11 +24,13 @@ use Friendica\Core\Addon;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
 use Friendica\Core\PConfig;
+use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
 use Friendica\Database\DBM;
 use Friendica\Database\DBStructure;
 use Friendica\Model\Contact;
+use Friendica\Model\Conversation;
 use Friendica\Util\DateTimeFormat;
 
 require_once 'include/text.php';
@@ -232,47 +234,51 @@ define('CP_USERS_AND_GLOBAL',    2);
 
 /**
  * @name Protocols
+ * @deprecated since version 3.6
+ * @see Conversation
  *
  * Different protocols that we are storing
  * @{
  */
-define('PROTOCOL_UNKNOWN',         0);
-define('PROTOCOL_DFRN',            1);
-define('PROTOCOL_DIASPORA',        2);
-define('PROTOCOL_OSTATUS_SALMON',  3);
-define('PROTOCOL_OSTATUS_FEED',    4); // Deprecated
-define('PROTOCOL_GS_CONVERSATION', 5); // Deprecated
-define('PROTOCOL_SPLITTED_CONV',   6);
+define('PROTOCOL_UNKNOWN'        , Conversation::PROTOCOL_UNKNOWN);
+define('PROTOCOL_DFRN'           , Conversation::PROTOCOL_DFRN);
+define('PROTOCOL_DIASPORA'       , Conversation::PROTOCOL_DIASPORA);
+define('PROTOCOL_OSTATUS_SALMON' , Conversation::PROTOCOL_OSTATUS_SALMON);
+define('PROTOCOL_OSTATUS_FEED'   , Conversation::PROTOCOL_OSTATUS_FEED);    // Deprecated
+define('PROTOCOL_GS_CONVERSATION', Conversation::PROTOCOL_GS_CONVERSATION); // Deprecated
+define('PROTOCOL_SPLITTED_CONV'  , Conversation::PROTOCOL_SPLITTED_CONV);
 /**
  * @}
  */
 
 /**
- * @name Network
+ * @name Network constants
+ * @deprecated since version 3.6
+ * @see Protocol
  *
  * Network and protocol family types
  * @{
  */
-define('NETWORK_DFRN',             'dfrn');    // Friendica, Mistpark, other DFRN implementations
-define('NETWORK_ZOT',              'zot!');    // Zot! - Currently unsupported
-define('NETWORK_OSTATUS',          'stat');    // GNU-social, Pleroma, Mastodon, other OStatus implementations
-define('NETWORK_FEED',             'feed');    // RSS/Atom feeds with no known "post/notify" protocol
-define('NETWORK_DIASPORA',         'dspr');    // Diaspora
-define('NETWORK_MAIL',             'mail');    // IMAP/POP
-define('NETWORK_FACEBOOK',         'face');    // Facebook API
-define('NETWORK_LINKEDIN',         'lnkd');    // LinkedIn
-define('NETWORK_XMPP',             'xmpp');    // XMPP - Currently unsupported
-define('NETWORK_MYSPACE',          'mysp');    // MySpace - Currently unsupported
-define('NETWORK_GPLUS',            'goog');    // Google+
-define('NETWORK_PUMPIO',           'pump');    // pump.io
-define('NETWORK_TWITTER',          'twit');    // Twitter
-define('NETWORK_DIASPORA2',        'dspc');    // Diaspora connector
-define('NETWORK_STATUSNET',        'stac');    // Statusnet connector
-define('NETWORK_APPNET',           'apdn');    // app.net - Dead protocol
-define('NETWORK_NEWS',             'nntp');    // Network News Transfer Protocol - Currently unsupported
-define('NETWORK_ICALENDAR',        'ical');    // iCalendar - Currently unsupported
-define('NETWORK_PNUT',             'pnut');    // pnut.io - Currently unsupported
-define('NETWORK_PHANTOM',          'unkn');    // Place holder
+define('NETWORK_DFRN'     , Protocol::DFRN);      // Friendica, Mistpark, other DFRN implementations
+define('NETWORK_ZOT'      , Protocol::ZOT);       // Zot! - Currently unsupported
+define('NETWORK_OSTATUS'  , Protocol::OSTATUS);   // GNU-social, Pleroma, Mastodon, other OStatus implementations
+define('NETWORK_FEED'     , Protocol::FEED);      // RSS/Atom feeds with no known "post/notify" protocol
+define('NETWORK_DIASPORA' , Protocol::DIASPORA);  // Diaspora
+define('NETWORK_MAIL'     , Protocol::MAIL);      // IMAP/POP
+define('NETWORK_FACEBOOK' , Protocol::FACEBOOK);  // Facebook API
+define('NETWORK_LINKEDIN' , Protocol::LINKEDIN);  // LinkedIn
+define('NETWORK_XMPP'     , Protocol::XMPP);      // XMPP - Currently unsupported
+define('NETWORK_MYSPACE'  , Protocol::MYSPACE);   // MySpace - Currently unsupported
+define('NETWORK_GPLUS'    , Protocol::GPLUS);     // Google+
+define('NETWORK_PUMPIO'   , Protocol::PUMPIO);    // pump.io
+define('NETWORK_TWITTER'  , Protocol::TWITTER);   // Twitter
+define('NETWORK_DIASPORA2', Protocol::DIASPORA2); // Diaspora connector
+define('NETWORK_STATUSNET', Protocol::STATUSNET); // Statusnet connector
+define('NETWORK_APPNET'   , Protocol::APPNET);    // app.net - Dead protocol
+define('NETWORK_NEWS'     , Protocol::NEWS);      // Network News Transfer Protocol - Currently unsupported
+define('NETWORK_ICALENDAR', Protocol::ICALENDAR); // iCalendar - Currently unsupported
+define('NETWORK_PNUT'     , Protocol::PNUT);      // pnut.io - Currently unsupported
+define('NETWORK_PHANTOM'  , Protocol::PHANTOM);   // Place holder
 /**
  * @}
  */
diff --git a/doc/BBCode.md b/doc/BBCode.md
index 6eebed4864..946c61f247 100644
--- a/doc/BBCode.md
+++ b/doc/BBCode.md
@@ -165,7 +165,7 @@ line
 code</code></td>
 </tr>
 <tr>
-  <td>[code=php]function text_highlight($s,$lang)[/code]</td>
+  <td>[code=php]function text_highlight($s,$lang)[/code]<sup><a href="#supported-code">1</a></sup></td>
   <td><code><div class="hl-main"><ol class="hl-main"><li><span class="hl-code">&nbsp;</span><span class="hl-reserved">function</span><span class="hl-code"> </span><span class="hl-identifier">text_highlight</span><span class="hl-brackets">(</span><span class="hl-var">$s</span><span class="hl-code">,</span><span class="hl-var">$lang</span><span class="hl-brackets">)</span></li></ol></div></code></td>
 </tr>
 <tr>
@@ -208,6 +208,27 @@ code</code></td>
 </tr>
 </table>
 
+<a name="supported-code">1</a>: Supported language parameter values for code highlighting:
+- abap
+- avrc
+- cpp
+- css
+- diff
+- dtd
+- html
+- java
+- javascript
+- js
+- mysql
+- perl
+- php
+- python
+- ruby
+- sh
+- sql
+- vbscript
+- xml
+
 ### Titles
 
 <table class="bbcodes">
diff --git a/include/acl_selectors.php b/include/acl_selectors.php
index 72f49a40ba..076bb2a498 100644
--- a/include/acl_selectors.php
+++ b/include/acl_selectors.php
@@ -2,12 +2,14 @@
 /**
  * @file include/acl_selectors.php
  */
+
 use Friendica\App;
 use Friendica\Content\Feature;
 use Friendica\Content\Widget;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
+use Friendica\Core\Protocol;
 use Friendica\Database\DBM;
 use Friendica\Model\Contact;
 use Friendica\Model\GContact;
@@ -248,7 +250,7 @@ function contact_select($selname, $selclass, $preselected = false, $size = 4, $p
 			}
 
 			if ($privmail) {
-				$trimmed = GetProfileUsername($rr['url'], $rr['name'], false);
+				$trimmed = Protocol::formatMention($rr['url'], $rr['name']);
 			} else {
 				$trimmed = mb_substr($rr['name'],0,20);
 			}
diff --git a/include/api.php b/include/api.php
index 1e8ba13d41..41631567f3 100644
--- a/include/api.php
+++ b/include/api.php
@@ -2751,7 +2751,7 @@ function api_get_entitities(&$text, $bbcode)
 		return [];
 	}
 
-	$bbcode = bb_CleanPictureLinks($bbcode);
+	$bbcode = BBCode::cleanPictureLinks($bbcode);
 
 	// Change pure links in text to bbcode uris
 	$bbcode = preg_replace("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2]$2[/url]', $bbcode);
@@ -5171,7 +5171,7 @@ function api_clean_plain_items($Text)
 {
 	$include_entities = strtolower(x($_REQUEST, 'include_entities') ? $_REQUEST['include_entities'] : "false");
 
-	$Text = bb_CleanPictureLinks($Text);
+	$Text = BBCode::cleanPictureLinks($Text);
 	$URLSearchString = "^\[\]";
 
 	$Text = preg_replace("/([!#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $Text);
diff --git a/include/bb2diaspora.php b/include/bb2diaspora.php
index 0cb50e95ee..c1c9fa4c3d 100644
--- a/include/bb2diaspora.php
+++ b/include/bb2diaspora.php
@@ -76,10 +76,10 @@ function diaspora2bb($s) {
 	$s = preg_replace('/([^\]=]|^)(https?\:\/\/)([a-zA-Z0-9:\/\-?&;.=_~#%$!+,@]+(?<!,))/ism', '$1[url=$2$3]$2$3[/url]', $s);
 
 	//$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
-	$s = bb_tag_preg_replace('/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism', '[youtube]$2[/youtube]', 'url', $s);
-	$s = bb_tag_preg_replace('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism'   , '[youtube]$1[/youtube]', 'url', $s);
-	$s = bb_tag_preg_replace('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism'        , '[vimeo]$2[/vimeo]'    , 'url', $s);
-	$s = bb_tag_preg_replace('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism'              , '[vimeo]$1[/vimeo]'    , 'url', $s);
+	$s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism', '[youtube]$2[/youtube]', 'url', $s);
+	$s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism'   , '[youtube]$1[/youtube]', 'url', $s);
+	$s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism'        , '[vimeo]$2[/vimeo]'    , 'url', $s);
+	$s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism'              , '[vimeo]$1[/vimeo]'    , 'url', $s);
 
 	// remove duplicate adjacent code tags
 	$s = preg_replace('/(\[code\])+(.*?)(\[\/code\])+/ism', '[code]$2[/code]', $s);
@@ -130,7 +130,7 @@ function bb2diaspora($Text, $preserve_nl = false, $fordiaspora = true) {
 
 	// Since Diaspora is creating a summary for links, this function removes them before posting
 	if ($fordiaspora) {
-		$Text = bb_remove_share_information($Text);
+		$Text = BBCode::removeShareInformation($Text);
 	}
 
 	/**
diff --git a/include/bbcode.php b/include/bbcode.php
index 20631818a2..ab211e5549 100644
--- a/include/bbcode.php
+++ b/include/bbcode.php
@@ -2,1445 +2,10 @@
 /**
  * @file include/bbcode.php
  */
-use Friendica\App;
-use Friendica\Content\Smilies;
-use Friendica\Content\OEmbed;
+
 use Friendica\Content\Text\BBCode;
-use Friendica\Core\Addon;
-use Friendica\Core\Cache;
-use Friendica\Core\L10n;
-use Friendica\Core\System;
-use Friendica\Core\Config;
-use Friendica\Model\Contact;
-use Friendica\Util\Map;
-use Friendica\Util\Network;
 
-require_once 'include/event.php';
-require_once 'mod/proxy.php';
-
-function bb_PictureCacheExt($matches) {
-	if (strpos($matches[3], "data:image/") === 0) {
-		return $matches[0];
-	}
-
-	$matches[3] = proxy_url($matches[3]);
-	return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
-}
-
-function bb_PictureCache($matches) {
-	if (strpos($matches[1], "data:image/") === 0) {
-		return $matches[0];
-	}
-
-	$matches[1] = proxy_url($matches[1]);
-	return "[img]" . $matches[1] . "[/img]";
-}
-
-function bb_map_coords($match) {
-	// the extra space in the following line is intentional
-	return str_replace($match[0], '<div class="map"  >' . Map::byCoordinates(str_replace('/', ' ', $match[1])) . '</div>', $match[0]);
-}
-function bb_map_location($match) {
-	// the extra space in the following line is intentional
-	return str_replace($match[0], '<div class="map"  >' . Map::byLocation($match[1]) . '</div>', $match[0]);
-}
-
-/**
- * Processes [attachment] tags
- *
- * Note: Can produce a [bookmark] tag in the returned string
- *
- * @brief Processes [attachment] tags
- * @param string $return
- * @param bool|int $simplehtml
- * @param bool $tryoembed
- * @return string
- */
-function bb_attachment($return, $simplehtml = false, $tryoembed = true)
-{
-	$data = BBCode::getAttachmentData($return);
-	if (!$data) {
-		return $return;
-	}
-
-	if (isset($data["title"])) {
-		$data["title"] = strip_tags($data["title"]);
-		$data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
-	}
-
-	if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && ($data["image"] != "")) {
-		$data["preview"] = $data["image"];
-		$data["image"] = "";
-	}
-
-	$return = '';
-	if ($simplehtml == 7) {
-		$return = style_url_for_mastodon($data["url"]);
-	} elseif (($simplehtml != 4) && ($simplehtml != 0)) {
-		$return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
-	} else {
-		try {
-			if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
-				$return = OEmbed::getHTML($data['url'], $data['title']);
-			} else {
-				throw new Exception('OEmbed is disabled for this attachment.');
-			}
-		} catch (Exception $e) {
-			if ($simplehtml != 4) {
-				$return = sprintf('<div class="type-%s">', $data["type"]);
-			}
-
-			if ($data["image"] != "") {
-				$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], proxy_url($data["image"]), $data["title"]);
-			} elseif ($data["preview"] != "") {
-				$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], proxy_url($data["preview"]), $data["title"]);
-			}
-
-			if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
-				$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], proxy_url($data["image"]), $data["title"]);
-			} else {
-				$return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
-			}
-
-			if ($data["description"] != "" && $data["description"] != $data["title"]) {
-				$return .= sprintf('<blockquote>%s</blockquote>', trim(bbcode($data["description"])));
-			}
-
-			if ($data["type"] == "link") {
-				$return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
-			}
-
-			if ($simplehtml != 4) {
-				$return .= '</div>';
-			}
-		}
-	}
-
-	return trim($data["text"] . ' ' . $return . ' ' . $data["after"]);
-}
-
-function bb_remove_share_information($Text, $plaintext = false, $nolink = false) {
-
-	$data = BBCode::getAttachmentData($Text);
-
-	if (!$data) {
-		return $Text;
-	} elseif ($nolink) {
-		return $data["text"] . $data["after"];
-	}
-
-	$title = htmlentities($data["title"], ENT_QUOTES, 'UTF-8', false);
-	$text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
-	if ($plaintext || (($title != "") && strstr($text, $title))) {
-		$data["title"] = $data["url"];
-	} elseif (($text != "") && strstr($title, $text)) {
-		$data["text"] = $data["title"];
-		$data["title"] = $data["url"];
-	}
-
-	if (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
-		return $data["title"] . $data["after"];
-	}
-
-	// If the link already is included in the post, don't add it again
-	if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
-		return $data["text"] . $data["after"];
-	}
-
-	$text = $data["text"];
-
-	if (($data["url"] != "") && ($data["title"] != "")) {
-		$text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
-	} elseif (($data["url"] != "")) {
-		$text .= "\n" . $data["url"];
-	}
-
-	return $text . "\n" . $data["after"];
-}
-
-function bb_cleanstyle($st) {
-	return "<span style=\"" . cleancss($st[1]) . ";\">" . $st[2] . "</span>";
-}
-
-function bb_cleanclass($st) {
-	return "<span class=\"" . cleancss($st[1]) . "\">" . $st[2] . "</span>";
-}
-
-function cleancss($input) {
-
-	$cleaned = "";
-
-	$input = strtolower($input);
-
-	for ($i = 0; $i < strlen($input); $i++) {
-		$char = substr($input, $i, 1);
-
-		if (($char >= "a") && ($char <= "z")) {
-			$cleaned .= $char;
-		}
-
-		if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
-			$cleaned .= $char;
-		}
-	}
-
-	return $cleaned;
-}
-
-/**
- * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
- * @param array $match Array with the matching values
- * @return string reformatted link including HTML codes
- */
-function bb_style_url($match) {
-        $url = $match[1];
-
-	if (isset($match[2]) && ($match[1] != $match[2])) {
-		return $match[0];
-	}
-
-        $parts = parse_url($url);
-        if (!isset($parts['scheme'])) {
-                return $match[0];
-        }
-
-	return style_url_for_mastodon($url);
-}
-
-/**
- * @brief Converts [url] BBCodes in a format that looks fine on Mastodon and GNU Social.
- * @param string $url URL that is about to be reformatted
- * @return string reformatted link including HTML codes
- */
-function style_url_for_mastodon($url) {
-        $styled_url = $url;
-
-        $parts = parse_url($url);
-        $scheme = $parts['scheme'].'://';
-        $styled_url = str_replace($scheme, '', $styled_url);
-
-        $html = '<a href="%s" class="attachment" rel="nofollow noopener" target="_blank">'.
-                 '<span class="invisible">%s</span>';
-
-        if (strlen($styled_url) > 30) {
-                $html .= '<span class="ellipsis">%s</span>'.
-                        '<span class="invisible">%s</span></a>';
-
-                $ellipsis = substr($styled_url, 0, 30);
-                $rest = substr($styled_url, 30);
-                return sprintf($html, $url, $scheme, $ellipsis, $rest);
-        } else {
-                $html .= '%s</a>';
-                return sprintf($html, $url, $scheme, $styled_url);
-        }
-}
-
-function stripcode_br_cb($s) {
-	return '[code]' . str_replace('<br />', '', $s[1]) . '[/code]';
-}
-
-/*
- * [noparse][i]italic[/i][/noparse] turns into
- * [noparse][ i ]italic[ /i ][/noparse],
- * to hide them from parser.
- */
-function bb_spacefy($st) {
-	$whole_match = $st[0];
-	$captured = $st[1];
-	$spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
-	$new_str = str_replace($captured, $spacefied, $whole_match);
-	return $new_str;
-}
-
-/*
- * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
- * now turns back and the [noparse] tags are trimed
- * returning [i]italic[/i]
- */
-function bb_unspacefy_and_trim($st) {
-	$captured = $st[1];
-	$unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
-	return $unspacefied;
-}
-
-function bb_find_open_close($s, $open, $close, $occurence = 1) {
-	if ($occurence < 1) {
-		$occurence = 1;
-	}
-
-	$start_pos = -1;
-	for ($i = 1; $i <= $occurence; $i++) {
-		if ($start_pos !== false) {
-			$start_pos = strpos($s, $open, $start_pos + 1);
-		}
-	}
-
-	if ($start_pos === false) {
-		return false;
-	}
-
-	$end_pos = strpos($s, $close, $start_pos);
-
-	if ($end_pos === false) {
-		return false;
-	}
-
-	$res = [ 'start' => $start_pos, 'end' => $end_pos ];
-
-	return $res;
-}
-
-function get_bb_tag_pos($s, $name, $occurence = 1) {
-	if ($occurence < 1) {
-		$occurence = 1;
-	}
-
-	$start_open = -1;
-	for ($i = 1; $i <= $occurence; $i++) {
-		if ($start_open !== false) {
-			$start_open = strpos($s, '[' . $name, $start_open + 1); // allow [name= type tags
-		}
-	}
-
-	if ($start_open === false) {
-		return false;
-	}
-
-	$start_equal = strpos($s, '=', $start_open);
-	$start_close = strpos($s, ']', $start_open);
-
-	if ($start_close === false) {
-		return false;
-	}
-
-	$start_close++;
-
-	$end_open = strpos($s, '[/' . $name . ']', $start_close);
-
-	if ($end_open === false) {
-		return false;
-	}
-
-	$res = [
-		'start' => [
-			'open'  => $start_open,
-			'close' => $start_close
-		],
-		'end'   => [
-			'open'  => $end_open,
-			'close' => $end_open + strlen('[/' . $name . ']')
-		],
-	];
-
-	if ($start_equal !== false) {
-		$res['start']['equal'] = $start_equal + 1;
-	}
-
-	return $res;
-}
-
-function bb_tag_preg_replace($pattern, $replace, $name, $s) {
-
-	$string = $s;
-
-	$occurence = 1;
-	$pos = get_bb_tag_pos($string, $name, $occurence);
-	while ($pos !== false && $occurence < 1000) {
-		$start = substr($string, 0, $pos['start']['open']);
-		$subject = substr($string, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
-		$end = substr($string, $pos['end']['close']);
-		if ($end === false) {
-			$end = '';
-		}
-
-		$subject = preg_replace($pattern, $replace, $subject);
-		$string = $start . $subject . $end;
-
-		$occurence++;
-		$pos = get_bb_tag_pos($string, $name, $occurence);
-	}
-
-	return $string;
-}
-
-function bb_extract_images($body) {
-
-	$saved_image = [];
-	$orig_body = $body;
-	$new_body = '';
-
-	$cnt = 0;
-	$img_start = strpos($orig_body, '[img');
-	$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
-	$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
-	while (($img_st_close !== false) && ($img_end !== false)) {
-
-		$img_st_close++; // make it point to AFTER the closing bracket
-		$img_end += $img_start;
-
-		if (! strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
-			// This is an embedded image
-
-			$saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
-			$new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
-
-			$cnt++;
-		} else {
-			$new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
-		}
-
-		$orig_body = substr($orig_body, $img_end + strlen('[/img]'));
-
-		if ($orig_body === false) {
-			// in case the body ends on a closing image tag
-			$orig_body = '';
-		}
-
-		$img_start = strpos($orig_body, '[img');
-		$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
-		$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
-	}
-
-	$new_body = $new_body . $orig_body;
-
-	return ['body' => $new_body, 'images' => $saved_image];
-}
-
-function bb_replace_images($body, $images) {
-
-	$newbody = $body;
-
-	$cnt = 0;
-	foreach ($images as $image) {
-		// We're depending on the property of 'foreach' (specified on the PHP website) that
-		// it loops over the array starting from the first element and going sequentially
-		// to the last element
-		$newbody = str_replace('[$#saved_image' . $cnt . '#$]', '<img src="' . proxy_url($image) .'" alt="' . L10n::t('Image/photo') . '" />', $newbody);
-		$cnt++;
-	}
-
-	return $newbody;
-}
-
-/**
- * Processes [share] tags
- *
- * Note: Can produce a [bookmark] tag in the output
- *
- * @brief Processes [share] tags
- * @param array    $share      preg_match_callback result array
- * @param bool|int $simplehtml
- * @return string
- */
-function bb_ShareAttributes($share, $simplehtml)
-{
-	$attributes = $share[2];
-
-	$author = "";
-	preg_match("/author='(.*?)'/ism", $attributes, $matches);
-	if (x($matches, 1)) {
-		$author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
-	}
-
-	preg_match('/author="(.*?)"/ism', $attributes, $matches);
-	if (x($matches, 1)) {
-		$author = $matches[1];
-	}
-
-	$profile = "";
-	preg_match("/profile='(.*?)'/ism", $attributes, $matches);
-	if (x($matches, 1)) {
-		$profile = $matches[1];
-	}
-
-	preg_match('/profile="(.*?)"/ism', $attributes, $matches);
-	if (x($matches, 1)) {
-		$profile = $matches[1];
-	}
-
-	$avatar = "";
-	preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
-	if (x($matches, 1)) {
-		$avatar = $matches[1];
-	}
-
-	preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
-	if (x($matches, 1)) {
-		$avatar = $matches[1];
-	}
-
-	$link = "";
-	preg_match("/link='(.*?)'/ism", $attributes, $matches);
-	if (x($matches, 1)) {
-		$link = $matches[1];
-	}
-
-	preg_match('/link="(.*?)"/ism', $attributes, $matches);
-	if (x($matches, 1)) {
-		$link = $matches[1];
-	}
-
-	$posted = "";
-
-	preg_match("/posted='(.*?)'/ism", $attributes, $matches);
-	if (x($matches, 1)) {
-		$posted = $matches[1];
-	}
-
-	preg_match('/posted="(.*?)"/ism', $attributes, $matches);
-	if (x($matches, 1)) {
-		$posted = $matches[1];
-	}
-
-	// We only call this so that a previously unknown contact can be added.
-	// This is important for the function "get_contact_details_by_url".
-	// This function then can fetch an entry from the contact table.
-	Contact::getIdForURL($profile, 0);
-
-	$data = Contact::getDetailsByURL($profile);
-
-	if (x($data, "name") && x($data, "addr")) {
-		$userid_compact = $data["name"] . " (" . $data["addr"] . ")";
-	} else {
-		$userid_compact = GetProfileUsername($profile, $author, true);
-	}
-
-	if (x($data, "addr")) {
-		$userid = $data["addr"];
-	} else {
-		$userid = GetProfileUsername($profile, $author, false);
-	}
-
-	if (x($data, "name")) {
-		$author = $data["name"];
-	}
-
-	if (x($data, "micro")) {
-		$avatar = $data["micro"];
-	}
-
-	$preshare = trim($share[1]);
-	if ($preshare != "") {
-		$preshare .= "<br />";
-	}
-
-	switch ($simplehtml) {
-		case 1:
-			$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];
-			break;
-		case 3: // Diaspora
-			$headline .= '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';
-
-			$text = trim($share[1]);
-
-			if ($text != "") {
-				$text .= "<hr />";
-			}
-
-			if (stripos(normalise_link($link), 'http://twitter.com/') === 0) {
-				$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>';
-			}
-
-			break;
-		case 4:
-			$headline .= '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
-			$headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
-			$headline .= ":</b><br />";
-
-			$text = trim($share[1]);
-
-			if ($text != "") {
-				$text .= "<hr />";
-			}
-
-			$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];
-			break;
-		case 6: // app.net
-			$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];
-			break;
-		case 8: // twitter
-			$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 />" . $share[3];
-
-			if ($link != "") {
-				$text .= "<br /><br />" . $link;
-			}
-			break;
-		default:
-			// Transforms quoted tweets in rich attachments to avoid nested tweets
-			if (stripos(normalise_link($link), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($link)) {
-				try {
-					$oembed = OEmbed::getHTML($link, $preshare);
-				} catch (Exception $e) {
-					$oembed = sprintf('[bookmark=%s]%s[/bookmark]', $link, $preshare);
-				}
-
-				$text = $preshare . $oembed;
-			} else {
-				$text = trim($share[1]) . "\n";
-
-				$avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);
-
-				$tpl = get_markup_template('shared_content.tpl');
-				$text .= replace_macros($tpl, [
-					'$profile' => $profile,
-					'$avatar' => $avatar,
-					'$author' => $author,
-					'$link' => $link,
-					'$posted' => $posted,
-					'$content' => trim($share[3])
-				]);
-			}
-			break;
-	}
-
-	return $text;
-}
-
-function GetProfileUsername($profile, $username, $compact = false, $getnetwork = false) {
-
-	$twitter = preg_replace("=https?://twitter.com/(.*)=ism", "$1@twitter.com", $profile);
-	if ($twitter != $profile) {
-		if ($getnetwork) {
-			return NETWORK_TWITTER;
-		} elseif ($compact) {
-			return $twitter;
-		} else {
-			return ($username . " (" . $twitter . ")");
-		}
-	}
-
-	$appnet = preg_replace("=https?://alpha.app.net/(.*)=ism", "$1@alpha.app.net", $profile);
-	if ($appnet != $profile) {
-		if ($getnetwork) {
-			return NETWORK_APPNET;
-		} elseif ($compact) {
-			return $appnet;
-		} else {
-			return ($username . " (" . $appnet . ")");
-		}
-	}
-
-	$gplus = preg_replace("=https?://plus.google.com/(.*)=ism", "$1@plus.google.com", $profile);
-	if ($gplus != $profile) {
-		if ($getnetwork) {
-			return NETWORK_GPLUS;
-		} elseif ($compact) {
-			return ($gplususername . " (" . $username . ")");
-		} else {
-			return ($username . " (" . $gplus . ")");
-		}
-	}
-
-	$friendica = preg_replace("=https?://(.*)/profile/(.*)=ism", "$2@$1", $profile);
-	if ($friendica != $profile) {
-		if ($getnetwork) {
-			return NETWORK_DFRN;
-		} elseif ($compact) {
-			return $friendica;
-		} else {
-			return ($username . " (" . $friendica . ")");
-		}
-	}
-
-	$diaspora = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
-	if ($diaspora != $profile) {
-		if ($getnetwork) {
-			return NETWORK_DIASPORA;
-		} elseif ($compact) {
-			return $diaspora;
-		} else {
-			return ($username . " (" . $diaspora . ")");
-		}
-	}
-
-	$red = preg_replace("=https?://(.*)/channel/(.*)=ism", "$2@$1", $profile);
-	if ($red != $profile) {
-		if ($getnetwork) {
-			// red is identified as Diaspora - friendica can't connect directly to it
-			return NETWORK_DIASPORA;
-		} elseif ($compact) {
-			return $red;
-		} else {
-			return ($username . " (" . $red . ")");
-		}
-	}
-
-	$StatusnetHost = preg_replace("=https?://(.*)/user/(.*)=ism", "$1", $profile);
-	if ($StatusnetHost != $profile) {
-		$StatusnetUser = preg_replace("=https?://(.*)/user/(.*)=ism", "$2", $profile);
-		if ($StatusnetUser != $profile) {
-			/// @TODO Some hosts run on https, not just http and sometimes http is disabled, let's support both here
-			$UserData = Network::fetchUrl("http://".$StatusnetHost."/api/users/show.json?user_id=".$StatusnetUser);
-			$user = json_decode($UserData);
-			if ($user) {
-				if ($getnetwork) {
-					return NETWORK_STATUSNET;
-				} elseif ($compact) {
-					return ($user->screen_name . "@" . $StatusnetHost);
-				} else {
-					return ($username . " (" . $user->screen_name . "@" . $StatusnetHost . ")");
-				}
-			}
-		}
-	}
-
-	// pumpio (http://host.name/user)
-	$rest = preg_replace("=https?://([\.\w]+)/([\.\w]+)(.*)=ism", "$3", $profile);
-	if ($rest == "") {
-		$pumpio = preg_replace("=https?://([\.\w]+)/([\.\w]+)(.*)=ism", "$2@$1", $profile);
-		if ($pumpio != $profile) {
-			if ($getnetwork) {
-				return NETWORK_PUMPIO;
-			} elseif ($compact) {
-				return $pumpio;
-			} else {
-				return ($username . " (" . $pumpio . ")");
-			}
-		}
-	}
-
-	return $username;
-}
-
-function bb_DiasporaLinks($match) {
-	return "[url=".System::baseUrl()."/display/".$match[1]."]".$match[2]."[/url]";
-}
-
-function bb_RemovePictureLinks($match) {
-	$text = Cache::get($match[1]);
-
-	if (is_null($text)) {
-		$a = get_app();
-
-		$stamp1 = microtime(true);
-
-		$ch = @curl_init($match[1]);
-		@curl_setopt($ch, CURLOPT_NOBODY, true);
-		@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-		@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
-		@curl_exec($ch);
-		$curl_info = @curl_getinfo($ch);
-
-		$a->save_timestamp($stamp1, "network");
-
-		if (substr($curl_info["content_type"], 0, 6) == "image/")
-			$text = "[url=".$match[1]."]".$match[1]."[/url]";
-		else {
-			$text = "[url=".$match[2]."]".$match[2]."[/url]";
-
-			// if its not a picture then look if its a page that contains a picture link
-			$body = Network::fetchUrl($match[1]);
-
-			$doc = new DOMDocument();
-			@$doc->loadHTML($body);
-			$xpath = new DomXPath($doc);
-			$list = $xpath->query("//meta[@name]");
-			foreach ($list as $node) {
-				$attr = [];
-
-				if ($node->attributes->length)
-					foreach ($node->attributes as $attribute)
-						$attr[$attribute->name] = $attribute->value;
-
-				if (strtolower($attr["name"]) == "twitter:image")
-					$text = "[url=".$attr["content"]."]".$attr["content"]."[/url]";
-			}
-		}
-		Cache::set($match[1],$text);
-	}
-
-	return $text;
-}
-
-function bb_expand_links($match) {
-	if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
-		return ($match[1] . "[url]" . $match[2] . "[/url]");
-	} else {
-		return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
-	}
-}
-
-function bb_CleanPictureLinksSub($match) {
-	$text = Cache::get($match[1]);
-
-	if (is_null($text)) {
-		$a = get_app();
-
-		$stamp1 = microtime(true);
-
-		$ch = @curl_init($match[1]);
-		@curl_setopt($ch, CURLOPT_NOBODY, true);
-		@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-		@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
-		@curl_exec($ch);
-		$curl_info = @curl_getinfo($ch);
-
-		$a->save_timestamp($stamp1, "network");
-
-		// if its a link to a picture then embed this picture
-		if (substr($curl_info["content_type"], 0, 6) == "image/")
-			$text = "[img]".$match[1]."[/img]";
-		else {
-			$text = "[img]".$match[2]."[/img]";
-
-			// if its not a picture then look if its a page that contains a picture link
-			$body = Network::fetchUrl($match[1]);
-
-			$doc = new DOMDocument();
-			@$doc->loadHTML($body);
-			$xpath = new DomXPath($doc);
-			$list = $xpath->query("//meta[@name]");
-			foreach ($list as $node) {
-				$attr = [];
-
-				if ($node->attributes->length)
-					foreach ($node->attributes as $attribute)
-						$attr[$attribute->name] = $attribute->value;
-
-				if (strtolower($attr["name"]) == "twitter:image")
-					$text = "[img]".$attr["content"]."[/img]";
-			}
-		}
-		Cache::set($match[1],$text);
-	}
-
-	return $text;
-}
-
-function bb_CleanPictureLinks($text) {
-	$text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'bb_CleanPictureLinksSub', $text);
-	return $text;
-}
-
-function bb_highlight($match) {
-	if (in_array(strtolower($match[1]), ['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
-		'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh'])) {
-		return text_highlight($match[2], strtolower($match[1]));
-	}
-	return $match[0];
-}
-
-/**
- * @brief Converts a BBCode message to HTML message
- *
- * BBcode 2 HTML was written by WAY2WEB.net
- * extended to work with Mistpark/Friendica - Mike Macgirvin
- *
- * Simple HTML values meaning:
- * - 0: Friendica display
- * - 1: Unused
- * - 2: Used for Facebook, Google+, Windows Phone push, Friendica API
- * - 3: Used before converting to Markdown in bb2diaspora.php
- * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
- * - 5: Unused
- * - 6: Used for Appnet
- * - 7: Used for dfrn, OStatus
- * - 8: Used for WP backlink text setting
- *
- * @staticvar array $allowed_src_protocols
- * @param string $Text
- * @param bool $preserve_nl
- * @param bool $tryoembed
- * @param int $simplehtml
- * @param bool $forplaintext
- * @return string
- */
 function bbcode($Text, $preserve_nl = false, $tryoembed = true, $simplehtml = false, $forplaintext = false)
 {
-	$a = get_app();
-
-	/*
-	 * preg_match_callback function to replace potential Oembed tags with Oembed content
-	 *
-	 * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
-	 * $match[1] = $url
-	 * $match[2] = $title or absent
-	 */
-	$tryoembed_callback = function ($match)
-	{
-		$url = $match[1];
-		$title = defaults($match, 2, null);
-
-		try {
-			$return = OEmbed::getHTML($url, $title);
-		} catch (Exception $ex) {
-			$return = $match[0];
-		}
-
-		return $return;
-	};
-
-	// Hide all [noparse] contained bbtags by spacefying them
-	// POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?
-
-	$Text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'bb_spacefy', $Text);
-	$Text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'bb_spacefy', $Text);
-	$Text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'bb_spacefy', $Text);
-
-	// Remove the abstract element. It is a non visible element.
-	$Text = remove_abstract($Text);
-
-	// Move all spaces out of the tags
-	$Text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $Text);
-	$Text = preg_replace("/(\s*)\[\/(\w*)\]/ism", '[/$2]$1', $Text);
-
-	// Extract the private images which use data urls since preg has issues with
-	// large data sizes. Stash them away while we do bbcode conversion, and then put them back
-	// in after we've done all the regex matching. We cannot use any preg functions to do this.
-
-	$extracted = bb_extract_images($Text);
-	$Text = $extracted['body'];
-	$saved_image = $extracted['images'];
-
-	// If we find any event code, turn it into an event.
-	// After we're finished processing the bbcode we'll
-	// replace all of the event code with a reformatted version.
-
-	$ev = bbtoevent($Text);
-
-	// Replace any html brackets with HTML Entities to prevent executing HTML or script
-	// Don't use strip_tags here because it breaks [url] search by replacing & with amp
-
-	$Text = str_replace("<", "&lt;", $Text);
-	$Text = str_replace(">", "&gt;", $Text);
-
-	// remove some newlines before the general conversion
-	$Text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $Text);
-	$Text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $Text);
-
-	$Text = preg_replace("/\n\[code\]/ism", "[code]", $Text);
-	$Text = preg_replace("/\[\/code\]\n/ism", "[/code]", $Text);
-
-	// when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
-	if (!$tryoembed) {
-		$Text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $Text);
-	}
-
-	// Check for [code] text here, before the linefeeds are messed with.
-	// The highlighter will unescape and re-escape the content.
-	if (strpos($Text, '[code=') !== false) {
-		$Text = preg_replace_callback("/\[code=(.*?)\](.*?)\[\/code\]/ism", 'bb_highlight', $Text);
-	}
-	// Convert new line chars to html <br /> tags
-
-	// nlbr seems to be hopelessly messed up
-	//	$Text = nl2br($Text);
-
-	// We'll emulate it.
-
-	$Text = trim($Text);
-	$Text = str_replace("\r\n", "\n", $Text);
-
-	// removing multiplicated newlines
-	if (Config::get("system", "remove_multiplicated_lines")) {
-		$search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
-				"\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
-		$replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
-				"[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
-		do {
-			$oldtext = $Text;
-			$Text = str_replace($search, $replace, $Text);
-		} while ($oldtext != $Text);
-	}
-
-	// Set up the parameters for a URL search string
-	$URLSearchString = "^\[\]";
-	// Set up the parameters for a MAIL search string
-	$MAILSearchString = $URLSearchString;
-
-	// if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
-	if (!$forplaintext) {
-		// Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
-		// Currently disabled, since the function is too greedy
-		// $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
-		$autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
-		$Text = preg_replace($autolink_regex, '$1[url]$2[/url]', $Text);
-		if ($simplehtml == 7) {
-			$Text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'bb_style_url', $Text);
-			$Text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'bb_style_url', $Text);
-		}
-	} else {
-		$Text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $Text);
-		$Text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'bb_RemovePictureLinks', $Text);
-	}
-
-
-	// Handle attached links or videos
-	$Text = bb_attachment($Text, $simplehtml, $tryoembed);
-
-	$Text = str_replace(["\r","\n"], ['<br />', '<br />'], $Text);
-
-	if ($preserve_nl) {
-		$Text = str_replace(["\n", "\r"], ['', ''], $Text);
-	}
-
-	// Remove all hashtag addresses
-	if ((!$tryoembed || $simplehtml) && !in_array($simplehtml, [3, 7])) {
-		$Text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $Text);
-	} elseif ($simplehtml == 3) {
-		// The ! is converted to @ since Diaspora only understands the @
-		$Text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
-			'@<a href="$2">$3</a>',
-			$Text);
-	} elseif ($simplehtml == 7) {
-		$Text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
-			'$1<span class="vcard"><a href="$2" class="url" title="$3"><span class="fn nickname mention">$3</span></a></span>',
-			$Text);
-	} elseif (!$simplehtml) {
-		$Text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
-			'$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
-			$Text);
-	}
-
-	// Bookmarks in red - will be converted to bookmarks in friendica
-	$Text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $Text);
-	$Text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $Text);
-	$Text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
-				"[bookmark=$1]$2[/bookmark]", $Text);
-
-	if (in_array($simplehtml, [2, 6, 7, 8, 9])) {
-		$Text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "bb_expand_links", $Text);
-		//$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
-		$Text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$Text);
-	}
-
-	if ($simplehtml == 5) {
-		$Text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $Text);
-	}
-
-	// Perform URL Search
-	if ($tryoembed) {
-		$Text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $tryoembed_callback, $Text);
-	}
-
-	if ($simplehtml == 5) {
-		$Text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $Text);
-	} else {
-		$Text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $Text);
-	}
-
-	// Handle Diaspora posts
-	$Text = preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi", 'bb_DiasporaLinks', $Text);
-
-	// Server independent link to posts and comments
-	// See issue: https://github.com/diaspora/diaspora_federation/issues/75
-	$expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
-	$Text = preg_replace($expression, System::baseUrl()."/display/$1", $Text);
-
-	$Text = preg_replace("/([#])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
-				'$1<a href="' . System::baseUrl() . '/search?tag=$3" class="tag" title="$3">$3</a>', $Text);
-
-	$Text = preg_replace("/\[url\=([$URLSearchString]*)\]#(.*?)\[\/url\]/ism",
-				'#<a href="' . System::baseUrl() . '/search?tag=$2" class="tag" title="$2">$2</a>', $Text);
-
-	$Text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $Text);
-	$Text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
-	//$Text = preg_replace("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
-
-	// Red compatibility, though the link can't be authenticated on Friendica
-	$Text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
-
-
-	// we may need to restrict this further if it picks up too many strays
-	// link acct:user@host to a webfinger profile redirector
-
-	$Text = preg_replace('/acct:([^@]+)@((?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63})/', '<a href="' . System::baseUrl() . '/acctlink?addr=$1@$2" target="extlink">acct:$1@$2</a>', $Text);
-
-	// Perform MAIL Search
-	$Text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $Text);
-	$Text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $Text);
-
-	// leave open the posibility of [map=something]
-	// this is replaced in prepare_body() which has knowledge of the item location
-
-	if (strpos($Text, '[/map]') !== false) {
-		$Text = preg_replace_callback("/\[map\](.*?)\[\/map\]/ism", 'bb_map_location', $Text);
-	}
-	if (strpos($Text, '[map=') !== false) {
-		$Text = preg_replace_callback("/\[map=(.*?)\]/ism", 'bb_map_coords', $Text);
-	}
-	if (strpos($Text, '[map]') !== false) {
-		$Text = preg_replace("/\[map\]/", '<div class="map"></div>', $Text);
-	}
-
-	// Check for headers
-	$Text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $Text);
-	$Text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $Text);
-	$Text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $Text);
-	$Text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $Text);
-	$Text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $Text);
-	$Text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $Text);
-
-	// Check for paragraph
-	$Text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $Text);
-
-	// Check for bold text
-	$Text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $Text);
-
-	// Check for Italics text
-	$Text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $Text);
-
-	// Check for Underline text
-	$Text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $Text);
-
-	// Check for strike-through text
-	$Text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<strike>$1</strike>', $Text);
-
-	// Check for over-line text
-	$Text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $Text);
-
-	// Check for colored text
-	$Text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $Text);
-
-	// Check for sized text
-	// [size=50] --> font-size: 50px (with the unit).
-	$Text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $Text);
-	$Text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $Text);
-
-	// Check for centered text
-	$Text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $Text);
-
-	// Check for list text
-	$Text = str_replace("[*]", "<li>", $Text);
-
-	// Check for style sheet commands
-	$Text = preg_replace_callback("(\[style=(.*?)\](.*?)\[\/style\])ism", "bb_cleanstyle", $Text);
-
-	// Check for CSS classes
-	$Text = preg_replace_callback("(\[class=(.*?)\](.*?)\[\/class\])ism", "bb_cleanclass", $Text);
-
-	// handle nested lists
-	$endlessloop = 0;
-
-	while ((((strpos($Text, "[/list]") !== false) && (strpos($Text, "[list") !== false)) ||
-	       ((strpos($Text, "[/ol]") !== false) && (strpos($Text, "[ol]") !== false)) ||
-	       ((strpos($Text, "[/ul]") !== false) && (strpos($Text, "[ul]") !== false)) ||
-	       ((strpos($Text, "[/li]") !== false) && (strpos($Text, "[li]") !== false))) && (++$endlessloop < 20)) {
-		$Text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $Text);
-		$Text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $Text);
-		$Text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $Text);
-		$Text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $Text);
-		$Text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $Text);
-		$Text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $Text);
-		$Text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $Text);
-		$Text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $Text);
-		$Text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $Text);
-		$Text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $Text);
-	}
-
-	$Text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $Text);
-	$Text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $Text);
-	$Text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $Text);
-	$Text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $Text);
-
-	$Text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $Text);
-	$Text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $Text);
-
-	$Text = str_replace('[hr]', '<hr />', $Text);
-
-	// This is actually executed in prepare_body()
-
-	$Text = str_replace('[nosmile]', '', $Text);
-
-	// Check for font change text
-	$Text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $Text);
-
-	// Declare the format for [code] layout
-
-//	$Text = preg_replace_callback("/\[code\](.*?)\[\/code\]/ism", 'stripcode_br_cb', $Text);
-
-	$CodeLayout = '<code>$1</code>';
-	// Check for [code] text
-	$Text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $Text);
-
-	// Declare the format for [spoiler] layout
-	$SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';
-
-	// Check for [spoiler] text
-	// handle nested quotes
-	$endlessloop = 0;
-	while ((strpos($Text, "[/spoiler]") !== false) && (strpos($Text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
-		$Text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", "$SpoilerLayout", $Text);
-	}
-
-	// Check for [spoiler=Author] text
-
-	$t_wrote = L10n::t('$1 wrote:');
-
-	// handle nested quotes
-	$endlessloop = 0;
-	while ((strpos($Text, "[/spoiler]")!== false)  && (strpos($Text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
-		$Text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
-				     "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
-				     $Text);
-	}
-
-	// Declare the format for [quote] layout
-	$QuoteLayout = '<blockquote>$1</blockquote>';
-
-	// Check for [quote] text
-	// handle nested quotes
-	$endlessloop = 0;
-	while ((strpos($Text, "[/quote]") !== false) && (strpos($Text, "[quote]") !== false) && (++$endlessloop < 20)) {
-		$Text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $Text);
-	}
-
-	// Check for [quote=Author] text
-
-	$t_wrote = L10n::t('$1 wrote:');
-
-	// handle nested quotes
-	$endlessloop = 0;
-	while ((strpos($Text, "[/quote]")!== false)  && (strpos($Text, "[quote=") !== false) && (++$endlessloop < 20)) {
-		$Text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
-				     "<br /><strong class=".'"author"'.">" . $t_wrote . "</strong><blockquote>$2</blockquote>",
-				     $Text);
-	}
-
-
-	// [img=widthxheight]image source[/img]
-	$Text = preg_replace_callback("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", 'bb_PictureCacheExt', $Text);
-
-	$Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $Text);
-	$Text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $Text);
-
-	// Images
-	// [img]pathtoimage[/img]
-	$Text = preg_replace_callback("/\[img\](.*?)\[\/img\]/ism", 'bb_PictureCache', $Text);
-
-	$Text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $Text);
-	$Text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $Text);
-
-	// Shared content
-	$Text = preg_replace_callback("/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
-		function ($match) use ($simplehtml) {
-			return bb_ShareAttributes($match, $simplehtml);
-		}, $Text);
-
-	$Text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . L10n::t('Encrypted content') . '" /><br />', $Text);
-	$Text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);
-	//$Text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);
-
-	// Try to Oembed
-	if ($tryoembed) {
-		$Text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4))\[\/video\]/ism", '<video src="$1" controls="controls" width="' . $a->videowidth . '" height="' . $a->videoheight . '" loop="true"><a href="$1">$1</a></video>', $Text);
-		$Text = preg_replace("/\[audio\](.*?\.(ogg|ogv|oga|ogm|webm|mp4|mp3))\[\/audio\]/ism", '<audio src="$1" controls="controls"><a href="$1">$1</a></audio>', $Text);
-
-		$Text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $tryoembed_callback, $Text);
-		$Text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $tryoembed_callback, $Text);
-	} else {
-		$Text = preg_replace("/\[video\](.*?)\[\/video\]/",
-					'<a href="$1" target="_blank">$1</a>', $Text);
-		$Text = preg_replace("/\[audio\](.*?)\[\/audio\]/",
-					'<a href="$1" target="_blank">$1</a>', $Text);
-	}
-
-	// html5 video and audio
-
-
-	if ($tryoembed) {
-		$Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $Text);
-	} else {
-		$Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $Text);
-	}
-
-	// Youtube extensions
-	if ($tryoembed) {
-		$Text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $tryoembed_callback, $Text);
-		$Text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $tryoembed_callback, $Text);
-		$Text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $tryoembed_callback, $Text);
-	}
-
-	$Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $Text);
-	$Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $Text);
-	$Text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $Text);
-
-	if ($tryoembed) {
-		$Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://www.youtube.com/embed/$1" frameborder="0" ></iframe>', $Text);
-	} else {
-		$Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
-					'<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $Text);
-	}
-
-	if ($tryoembed) {
-		$Text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $tryoembed_callback, $Text);
-		$Text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $tryoembed_callback, $Text);
-	}
-
-	$Text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $Text);
-	$Text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $Text);
-
-	if ($tryoembed) {
-		$Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://player.vimeo.com/video/$1" frameborder="0" ></iframe>', $Text);
-	} else {
-		$Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
-					'<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $Text);
-	}
-
-//	$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);
-
-	// Avoid triple linefeeds through oembed
-	$Text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $Text);
-
-	// If we found an event earlier, strip out all the event code and replace with a reformatted version.
-	// Replace the event-start section with the entire formatted event. The other bbcode is stripped.
-	// Summary (e.g. title) is required, earlier revisions only required description (in addition to
-	// start which is always required). Allow desc with a missing summary for compatibility.
-
-	if ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
-		$sub = format_event_html($ev, $simplehtml);
-
-		$Text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $Text);
-		$Text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $Text);
-		$Text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $Text);
-		$Text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $Text);
-		$Text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $Text);
-		$Text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $Text);
-		$Text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $Text);
-	}
-
-	// Replace non graphical smilies for external posts
-	if ($simplehtml) {
-		$Text = Smilies::replace($Text, false, true);
-	}
-
-	// Replace inline code blocks
-	$Text = preg_replace_callback("|(?!<br[^>]*>)<code>([^<]*)</code>(?!<br[^>]*>)|ism",
-		function ($match) use ($simplehtml) {
-			$return = '<key>' . $match[1] . '</key>';
-			// Use <code> for Diaspora inline code blocks
-			if ($simplehtml === 3) {
-				$return = '<code>' . $match[1] . '</code>';
-			}
-			return $return;
-		}
-	, $Text);
-
-	// Unhide all [noparse] contained bbtags unspacefying them
-	// and triming the [noparse] tag.
-
-	$Text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'bb_unspacefy_and_trim', $Text);
-	$Text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'bb_unspacefy_and_trim', $Text);
-	$Text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'bb_unspacefy_and_trim', $Text);
-
-
-	$Text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $Text);
-	$Text = preg_replace('/\&\#039\;/', '\'', $Text);
-	$Text = preg_replace('/\&quot\;/', '"', $Text);
-
-	// fix any escaped ampersands that may have been converted into links
-	$Text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $Text);
-
-	// sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
-	static $allowed_src_protocols = ['http', 'redir', 'cid'];
-	$Text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
-			     '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $Text);
-
-	// sanitize href attributes (only whitelisted protocols URLs)
-	// default value for backward compatibility
-	$allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);
-
-	// Always allowed protocol even if config isn't set or not including it
-	$allowed_link_protocols[] = 'http';
-	$allowed_link_protocols[] = 'redir/';
-
-	$regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
-	$Text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . L10n::t('Invalid link protocol') . '">', $Text);
-
-	if ($saved_image) {
-		$Text = bb_replace_images($Text, $saved_image);
-	}
-
-	// Clean up the HTML by loading and saving the HTML with the DOM.
-	// Bad structured html can break a whole page.
-	// For performance reasons do it only with ativated item cache or at export.
-	if (!$tryoembed || (get_itemcachepath() != "")) {
-		$doc = new DOMDocument();
-		$doc->preserveWhiteSpace = false;
-
-		$Text = mb_convert_encoding($Text, 'HTML-ENTITIES', "UTF-8");
-
-		$doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
-		$encoding = '<?xml encoding="UTF-8">';
-		@$doc->loadHTML($encoding.$doctype."<html><body>".$Text."</body></html>");
-		$doc->encoding = 'UTF-8';
-		$Text = $doc->saveHTML();
-		$Text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $Text);
-
-		$Text = str_replace('<br></li>', '</li>', $Text);
-
-		//$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
-	}
-
-	// Clean up some useless linebreaks in lists
-	//$Text = str_replace('<br /><ul', '<ul ', $Text);
-	//$Text = str_replace('</ul><br />', '</ul>', $Text);
-	//$Text = str_replace('</li><br />', '</li>', $Text);
-	//$Text = str_replace('<br /><li>', '<li>', $Text);
-	//$Text = str_replace('<br /><ul', '<ul ', $Text);
-
-	Addon::callHooks('bbcode', $Text);
-
-	return trim($Text);
-}
-
-/**
- * @brief Removes the "abstract" element from the text
- *
- * @param string $text The text with BBCode
- * @return string The same text - but without "abstract" element
- */
-function remove_abstract($text) {
-	$text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", '', $text);
-	$text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", '', $text);
-
-	return $text;
-}
-
-/**
- * @brief Returns the value of the "abstract" element
- *
- * @param string $text The text that maybe contains the element
- * @param string $addon The addon for which the abstract is meant for
- * @return string The abstract
- */
-function fetch_abstract($text, $addon = "") {
-	$abstract = "";
-	$abstracts = [];
-	$addon = strtolower($addon);
-
-	if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism",$text, $results, PREG_SET_ORDER))
-		foreach ($results AS $result)
-			$abstracts[strtolower($result[1])] = $result[2];
-
-	if (isset($abstracts[$addon]))
-		$abstract = $abstracts[$addon];
-
-	if ($abstract == "")
-		if (preg_match("/\[abstract\](.*?)\[\/abstract\]/ism",$text, $result))
-			$abstract = $result[1];
-
-	return $abstract;
+	return BBCode::convert($Text, $preserve_nl, $tryoembed, $simplehtml, $forplaintext);
 }
diff --git a/include/conversation.php b/include/conversation.php
index f0d6bbfaba..90634f4905 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -6,6 +6,7 @@
 use Friendica\App;
 use Friendica\Content\ContactSelector;
 use Friendica\Content\Feature;
+use Friendica\Content\Text\BBCode;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
@@ -72,7 +73,7 @@ function item_redir_and_replace_images($body, $images, $cid) {
 	$newbody = '';
 
 	$cnt = 1;
-	$pos = get_bb_tag_pos($origbody, 'url', 1);
+	$pos = BBCode::getTagPosition($origbody, 'url', 0);
 	while ($pos !== false && $cnt < 1000) {
 
 		$search = '/\[url\=(.*?)\]\[!#saved_image([0-9]*)#!\]\[\/url\]' . '/is';
@@ -90,7 +91,8 @@ function item_redir_and_replace_images($body, $images, $cid) {
 		$newbody .= $subject;
 
 		$cnt++;
-		$pos = get_bb_tag_pos($origbody, 'url', 1);
+		// Isn't this supposed to use $cnt value for $occurrences? - @MrPetovan
+		$pos = BBCode::getTagPosition($origbody, 'url', 0);
 	}
 	$newbody .= $origbody;
 
@@ -347,7 +349,7 @@ function localize_item(&$item) {
 	$photo_pattern = "/\[url=(.*?)\/photos\/(.*?)\/image\/(.*?)\]\[img(.*?)\]h(.*?)\[\/img\]\[\/url\]/is";
 	if (preg_match($photo_pattern, $item['body'])) {
 		$photo_replace = '[url=' . Profile::zrl('$1' . '/photos/' . '$2' . '/image/' . '$3' ,true) . '][img' . '$4' . ']h' . '$5'  . '[/img][/url]';
-		$item['body'] = bb_tag_preg_replace($photo_pattern, $photo_replace, 'url', $item['body']);
+		$item['body'] = BBCode::pregReplaceInTag($photo_pattern, $photo_replace, 'url', $item['body']);
 	}
 
 	// add sparkle links to appropriate permalinks
diff --git a/mod/display.php b/mod/display.php
index 8d991d4768..eb196b0979 100644
--- a/mod/display.php
+++ b/mod/display.php
@@ -2,9 +2,11 @@
 /**
  * @file mod/display.php
  */
+
 use Friendica\App;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
+use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
 use Friendica\Model\Contact;
@@ -171,7 +173,7 @@ function display_fetchauthor($a, $item) {
 			$profiledata["photo"] = $matches[1];
 		}
 		$profiledata["nickname"] = $profiledata["name"];
-		$profiledata["network"] = GetProfileUsername($profiledata["url"], "", false, true);
+		$profiledata["network"] = Protocol::matchByProfileUrl($profiledata["url"]);
 
 		$profiledata["address"] = "";
 		$profiledata["about"] = "";
diff --git a/src/Content/Text/BBCode.php b/src/Content/Text/BBCode.php
index 6feafdf854..d2df3cee2f 100644
--- a/src/Content/Text/BBCode.php
+++ b/src/Content/Text/BBCode.php
@@ -4,18 +4,28 @@
  */
 namespace Friendica\Content\Text;
 
-use Friendica\App;
+use DOMDocument;
+use Exception;
+use Friendica\Content\OEmbed;
+use Friendica\Content\Smilies;
 use Friendica\Content\Text\Plaintext;
+use Friendica\Core\Addon;
+use Friendica\Core\Cache;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
+use Friendica\Core\Protocol;
 use Friendica\Core\PConfig;
 use Friendica\Core\System;
+use Friendica\Model\Contact;
 use Friendica\Object\Image;
-use Friendica\Util\ParseUrl;
+use Friendica\Util\Map;
 use Friendica\Util\Network;
+use Friendica\Util\ParseUrl;
 
 require_once "include/bbcode.php";
+require_once "include/event.php";
 require_once "include/html2plain.php";
+require_once "mod/proxy.php";
 
 class BBCode
 {
@@ -345,7 +355,7 @@ class BBCode
 		$body = preg_replace("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url]$2[/url]', $body);
 
 		// Remove the abstract
-		$body = remove_abstract($body);
+		$body = self::stripAbstract($body);
 
 		// At first look at data that is attached via "type-..." stuff
 		// This will hopefully replaced with a dedicated bbcode later
@@ -362,8 +372,8 @@ class BBCode
 
 		// Fetch the abstract from the given target network
 		if ($target_network != "") {
-			$default_abstract = fetch_abstract($b["body"]);
-			$abstract = fetch_abstract($b["body"], $target_network);
+			$default_abstract = self::getAbstract($b["body"]);
+			$abstract = self::getAbstract($b["body"], $target_network);
 
 			// If we post to a network with no limit we only fetch
 			// an abstract exactly for this network
@@ -373,18 +383,18 @@ class BBCode
 		} else {// Try to guess the correct target network
 			switch ($htmlmode) {
 				case 8:
-					$abstract = fetch_abstract($b["body"], NETWORK_TWITTER);
+					$abstract = self::getAbstract($b["body"], NETWORK_TWITTER);
 					break;
 				case 7:
-					$abstract = fetch_abstract($b["body"], NETWORK_STATUSNET);
+					$abstract = self::getAbstract($b["body"], NETWORK_STATUSNET);
 					break;
 				case 6:
-					$abstract = fetch_abstract($b["body"], NETWORK_APPNET);
+					$abstract = self::getAbstract($b["body"], NETWORK_APPNET);
 					break;
 				default: // We don't know the exact target.
 					// We fetch an abstract since there is a posting limit.
 					if ($limit > 0) {
-						$abstract = fetch_abstract($b["body"]);
+						$abstract = self::getAbstract($b["body"]);
 					}
 			}
 		}
@@ -636,4 +646,1341 @@ class BBCode
 			return $body;
 		}
 	}
+
+	/**
+	 * Processes [attachment] tags
+	 *
+	 * Note: Can produce a [bookmark] tag in the returned string
+	 *
+	 * @brief Processes [attachment] tags
+	 * @param string $return
+	 * @param bool|int $simplehtml
+	 * @param bool $tryoembed
+	 * @return string
+	 */
+	private static function convertAttachment($return, $simplehtml = false, $tryoembed = true)
+	{
+		$data = self::getAttachmentData($return);
+		if (!$data) {
+			return $return;
+		}
+
+		if (isset($data["title"])) {
+			$data["title"] = strip_tags($data["title"]);
+			$data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
+		}
+
+		if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && ($data["image"] != "")) {
+			$data["preview"] = $data["image"];
+			$data["image"] = "";
+		}
+
+		$return = '';
+		if ($simplehtml == 7) {
+			$return = self::convertUrlForMastodon($data["url"]);
+		} elseif (($simplehtml != 4) && ($simplehtml != 0)) {
+			$return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
+		} else {
+			try {
+				if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
+					$return = OEmbed::getHTML($data['url'], $data['title']);
+				} else {
+					throw new Exception('OEmbed is disabled for this attachment.');
+				}
+			} catch (Exception $e) {
+				if ($simplehtml != 4) {
+					$return = sprintf('<div class="type-%s">', $data["type"]);
+				}
+
+				if ($data["image"] != "") {
+					$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], proxy_url($data["image"]), $data["title"]);
+				} elseif ($data["preview"] != "") {
+					$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], proxy_url($data["preview"]), $data["title"]);
+				}
+
+				if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
+					$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], proxy_url($data["image"]), $data["title"]);
+				} else {
+					$return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
+				}
+
+				if ($data["description"] != "" && $data["description"] != $data["title"]) {
+					$return .= sprintf('<blockquote>%s</blockquote>', trim(bbcode($data["description"])));
+				}
+
+				if ($data["type"] == "link") {
+					$return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
+				}
+
+				if ($simplehtml != 4) {
+					$return .= '</div>';
+				}
+			}
+		}
+
+		return trim($data["text"] . ' ' . $return . ' ' . $data["after"]);
+	}
+
+	public static function removeShareInformation($Text, $plaintext = false, $nolink = false)
+	{
+		$data = self::getAttachmentData($Text);
+
+		if (!$data) {
+			return $Text;
+		} elseif ($nolink) {
+			return $data["text"] . $data["after"];
+		}
+
+		$title = htmlentities($data["title"], ENT_QUOTES, 'UTF-8', false);
+		$text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
+		if ($plaintext || (($title != "") && strstr($text, $title))) {
+			$data["title"] = $data["url"];
+		} elseif (($text != "") && strstr($title, $text)) {
+			$data["text"] = $data["title"];
+			$data["title"] = $data["url"];
+		}
+
+		if (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
+			return $data["title"] . $data["after"];
+		}
+
+		// If the link already is included in the post, don't add it again
+		if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
+			return $data["text"] . $data["after"];
+		}
+
+		$text = $data["text"];
+
+		if (($data["url"] != "") && ($data["title"] != "")) {
+			$text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
+		} elseif (($data["url"] != "")) {
+			$text .= "\n" . $data["url"];
+		}
+
+		return $text . "\n" . $data["after"];
+	}
+
+	private static function cleanCss($input)
+	{
+		$cleaned = "";
+
+		$input = strtolower($input);
+
+		for ($i = 0; $i < strlen($input); $i++) {
+			$char = substr($input, $i, 1);
+
+			if (($char >= "a") && ($char <= "z")) {
+				$cleaned .= $char;
+			}
+
+			if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
+				$cleaned .= $char;
+			}
+		}
+
+		return $cleaned;
+	}
+
+	/**
+	 * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
+	 *
+	 * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
+	 * @param array $match Array with the matching values
+	 * @return string reformatted link including HTML codes
+	 */
+	private static function convertUrlForMastodonCallback($match)
+	{
+		$url = $match[1];
+
+		if (isset($match[2]) && ($match[1] != $match[2])) {
+			return $match[0];
+		}
+
+		$parts = parse_url($url);
+		if (!isset($parts['scheme'])) {
+			return $match[0];
+		}
+
+		return self::convertUrlForMastodon($url);
+	}
+
+	/**
+	 * @brief Converts [url] BBCodes in a format that looks fine on Mastodon and GNU Social.
+	 * @param string $url URL that is about to be reformatted
+	 * @return string reformatted link including HTML codes
+	 */
+	private static function convertUrlForMastodon($url)
+	{
+		$parts = parse_url($url);
+		$scheme = $parts['scheme'] . '://';
+		$styled_url = str_replace($scheme, '', $url);
+
+		$html = '<a href="%s" class="attachment" rel="nofollow noopener" target="_blank">' .
+			'<span class="invisible">%s</span>';
+
+		if (strlen($styled_url) > 30) {
+			$html .= '<span class="ellipsis">%s</span>' .
+				'<span class="invisible">%s</span></a>';
+
+			$ellipsis = substr($styled_url, 0, 30);
+			$rest = substr($styled_url, 30);
+			return sprintf($html, $url, $scheme, $ellipsis, $rest);
+		} else {
+			$html .= '%s</a>';
+			return sprintf($html, $url, $scheme, $styled_url);
+		}
+	}
+
+	/*
+	 * [noparse][i]italic[/i][/noparse] turns into
+	 * [noparse][ i ]italic[ /i ][/noparse],
+	 * to hide them from parser.
+	 */
+	private static function escapeNoparseCallback($match)
+	{
+		$whole_match = $match[0];
+		$captured = $match[1];
+		$spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
+		$new_str = str_replace($captured, $spacefied, $whole_match);
+		return $new_str;
+	}
+
+	/*
+	 * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
+	 * now turns back and the [noparse] tags are trimed
+	 * returning [i]italic[/i]
+	 */
+	private static function unescapeNoparseCallback($match)
+	{
+		$captured = $match[1];
+		$unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
+		return $unspacefied;
+	}
+
+	/**
+	 * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first
+	 * occurrences
+	 *
+	 * @param string $text        Text to search
+	 * @param string $name        Tag name
+	 * @param int    $occurrences Number of first occurrences to skip
+	 * @return boolean|array
+	 */
+	public static function getTagPosition($text, $name, $occurrences = 0)
+	{
+		if ($occurrences < 0) {
+			$occurrences = 0;
+		}
+
+		$start_open = -1;
+		for ($i = 0; $i <= $occurrences; $i++) {
+			if ($start_open !== false) {
+				$start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags
+			}
+		}
+
+		if ($start_open === false) {
+			return false;
+		}
+
+		$start_equal = strpos($text, '=', $start_open);
+		$start_close = strpos($text, ']', $start_open);
+
+		if ($start_close === false) {
+			return false;
+		}
+
+		$start_close++;
+
+		$end_open = strpos($text, '[/' . $name . ']', $start_close);
+
+		if ($end_open === false) {
+			return false;
+		}
+
+		$res = [
+			'start' => [
+				'open' => $start_open,
+				'close' => $start_close
+			],
+			'end' => [
+				'open' => $end_open,
+				'close' => $end_open + strlen('[/' . $name . ']')
+			],
+		];
+
+		if ($start_equal !== false) {
+			$res['start']['equal'] = $start_equal + 1;
+		}
+
+		return $res;
+	}
+
+	/**
+	 * Performs a preg_replace within the boundaries of all named BBCode tags in a text
+	 *
+	 * @param type $pattern Preg pattern string
+	 * @param type $replace Preg replace string
+	 * @param type $name    BBCode tag name
+	 * @param type $text    Text to search
+	 * @return string
+	 */
+	public static function pregReplaceInTag($pattern, $replace, $name, $text)
+	{
+		$occurrences = 0;
+		$pos = self::getTagPosition($text, $name, $occurrences);
+		while ($pos !== false && $occurrences++ < 1000) {
+			$start = substr($text, 0, $pos['start']['open']);
+			$subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
+			$end = substr($text, $pos['end']['close']);
+			if ($end === false) {
+				$end = '';
+			}
+
+			$subject = preg_replace($pattern, $replace, $subject);
+			$text = $start . $subject . $end;
+
+			$pos = self::getTagPosition($text, $name, $occurrences);
+		}
+
+		return $text;
+	}
+
+	private static function extractImagesFromItemBody($body)
+	{
+		$saved_image = [];
+		$orig_body = $body;
+		$new_body = '';
+
+		$cnt = 0;
+		$img_start = strpos($orig_body, '[img');
+		$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
+		$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
+		while (($img_st_close !== false) && ($img_end !== false)) {
+			$img_st_close++; // make it point to AFTER the closing bracket
+			$img_end += $img_start;
+
+			if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
+				// This is an embedded image
+				$saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
+				$new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
+
+				$cnt++;
+			} else {
+				$new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
+			}
+
+			$orig_body = substr($orig_body, $img_end + strlen('[/img]'));
+
+			if ($orig_body === false) {
+				// in case the body ends on a closing image tag
+				$orig_body = '';
+			}
+
+			$img_start = strpos($orig_body, '[img');
+			$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
+			$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
+		}
+
+		$new_body = $new_body . $orig_body;
+
+		return ['body' => $new_body, 'images' => $saved_image];
+	}
+
+	private static function interpolateSavedImagesIntoItemBody($body, array $images)
+	{
+		$newbody = $body;
+
+		$cnt = 0;
+		foreach ($images as $image) {
+			// We're depending on the property of 'foreach' (specified on the PHP website) that
+			// it loops over the array starting from the first element and going sequentially
+			// to the last element
+			$newbody = str_replace('[$#saved_image' . $cnt . '#$]',
+				'<img src="' . proxy_url($image) . '" alt="' . L10n::t('Image/photo') . '" />', $newbody);
+			$cnt++;
+		}
+
+		return $newbody;
+	}
+
+	/**
+	 * Processes [share] tags
+	 *
+	 * Note: Can produce a [bookmark] tag in the output
+	 *
+	 * @brief Processes [share] tags
+	 * @param array    $share      preg_match_callback result array
+	 * @param bool|int $simplehtml
+	 * @return string
+	 */
+	private static function convertShare($share, $simplehtml)
+	{
+		$attributes = $share[2];
+
+		$author = "";
+		preg_match("/author='(.*?)'/ism", $attributes, $matches);
+		if (x($matches, 1)) {
+			$author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
+		}
+
+		preg_match('/author="(.*?)"/ism', $attributes, $matches);
+		if (x($matches, 1)) {
+			$author = $matches[1];
+		}
+
+		$profile = "";
+		preg_match("/profile='(.*?)'/ism", $attributes, $matches);
+		if (x($matches, 1)) {
+			$profile = $matches[1];
+		}
+
+		preg_match('/profile="(.*?)"/ism', $attributes, $matches);
+		if (x($matches, 1)) {
+			$profile = $matches[1];
+		}
+
+		$avatar = "";
+		preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
+		if (x($matches, 1)) {
+			$avatar = $matches[1];
+		}
+
+		preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
+		if (x($matches, 1)) {
+			$avatar = $matches[1];
+		}
+
+		$link = "";
+		preg_match("/link='(.*?)'/ism", $attributes, $matches);
+		if (x($matches, 1)) {
+			$link = $matches[1];
+		}
+
+		preg_match('/link="(.*?)"/ism', $attributes, $matches);
+		if (x($matches, 1)) {
+			$link = $matches[1];
+		}
+
+		$posted = "";
+
+		preg_match("/posted='(.*?)'/ism", $attributes, $matches);
+		if (x($matches, 1)) {
+			$posted = $matches[1];
+		}
+
+		preg_match('/posted="(.*?)"/ism', $attributes, $matches);
+		if (x($matches, 1)) {
+			$posted = $matches[1];
+		}
+
+		// We only call this so that a previously unknown contact can be added.
+		// This is important for the function "Model\Contact::getDetailsByURL()".
+		// This function then can fetch an entry from the contact table.
+		Contact::getIdForURL($profile, 0);
+
+		$data = Contact::getDetailsByURL($profile);
+
+		if (x($data, "name") && x($data, "addr")) {
+			$userid_compact = $data["name"] . " (" . $data["addr"] . ")";
+		} else {
+			$userid_compact = Protocol::getAddrFromProfileUrl($profile, $author);
+		}
+
+		if (x($data, "addr")) {
+			$userid = $data["addr"];
+		} else {
+			$userid = Protocol::formatMention($profile, $author);
+		}
+
+		if (x($data, "name")) {
+			$author = $data["name"];
+		}
+
+		if (x($data, "micro")) {
+			$avatar = $data["micro"];
+		}
+
+		$preshare = trim($share[1]);
+		if ($preshare != "") {
+			$preshare .= "<br />";
+		}
+
+		switch ($simplehtml) {
+			case 1:
+				$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];
+				break;
+			case 3: // Diaspora
+				$headline .= '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';
+
+				$text = trim($share[1]);
+
+				if ($text != "") {
+					$text .= "<hr />";
+				}
+
+				if (stripos(normalise_link($link), 'http://twitter.com/') === 0) {
+					$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>';
+				}
+
+				break;
+			case 4:
+				$headline .= '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
+				$headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
+				$headline .= ":</b><br />";
+
+				$text = trim($share[1]);
+
+				if ($text != "") {
+					$text .= "<hr />";
+				}
+
+				$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];
+				break;
+			case 6: // app.net
+				$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];
+				break;
+			case 8: // twitter
+				$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 />" . $share[3];
+
+				if ($link != "") {
+					$text .= "<br /><br />" . $link;
+				}
+				break;
+			default:
+				// Transforms quoted tweets in rich attachments to avoid nested tweets
+				if (stripos(normalise_link($link), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($link)) {
+					try {
+						$oembed = OEmbed::getHTML($link, $preshare);
+					} catch (Exception $e) {
+						$oembed = sprintf('[bookmark=%s]%s[/bookmark]', $link, $preshare);
+					}
+
+					$text = $preshare . $oembed;
+				} else {
+					$text = trim($share[1]) . "\n";
+
+					$avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);
+
+					$tpl = get_markup_template('shared_content.tpl');
+					$text .= replace_macros($tpl, [
+						'$profile' => $profile,
+						'$avatar' => $avatar,
+						'$author' => $author,
+						'$link' => $link,
+						'$posted' => $posted,
+						'$content' => trim($share[3])
+					]);
+				}
+				break;
+		}
+
+		return $text;
+	}
+
+	private static function removePictureLinksCallback($match)
+	{
+		$text = Cache::get($match[1]);
+
+		if (is_null($text)) {
+			$a = get_app();
+
+			$stamp1 = microtime(true);
+
+			$ch = @curl_init($match[1]);
+			@curl_setopt($ch, CURLOPT_NOBODY, true);
+			@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+			@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
+			@curl_exec($ch);
+			$curl_info = @curl_getinfo($ch);
+
+			$a->save_timestamp($stamp1, "network");
+
+			if (substr($curl_info["content_type"], 0, 6) == "image/") {
+				$text = "[url=" . $match[1] . "]" . $match[1] . "[/url]";
+			} else {
+				$text = "[url=" . $match[2] . "]" . $match[2] . "[/url]";
+
+				// if its not a picture then look if its a page that contains a picture link
+				$body = Network::fetchUrl($match[1]);
+
+				$doc = new DOMDocument();
+				@$doc->loadHTML($body);
+				$xpath = new DomXPath($doc);
+				$list = $xpath->query("//meta[@name]");
+				foreach ($list as $node) {
+					$attr = [];
+
+					if ($node->attributes->length) {
+						foreach ($node->attributes as $attribute) {
+							$attr[$attribute->name] = $attribute->value;
+						}
+					}
+
+					if (strtolower($attr["name"]) == "twitter:image") {
+						$text = "[url=" . $attr["content"] . "]" . $attr["content"] . "[/url]";
+					}
+				}
+			}
+			Cache::set($match[1], $text);
+		}
+
+		return $text;
+	}
+
+	private static function expandLinksCallback($match)
+	{
+		if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
+			return ($match[1] . "[url]" . $match[2] . "[/url]");
+		} else {
+			return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
+		}
+	}
+
+	private static function cleanPictureLinksCallback($match)
+	{
+		$text = Cache::get($match[1]);
+
+		if (is_null($text)) {
+			$a = get_app();
+
+			$stamp1 = microtime(true);
+
+			$ch = @curl_init($match[1]);
+			@curl_setopt($ch, CURLOPT_NOBODY, true);
+			@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+			@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
+			@curl_exec($ch);
+			$curl_info = @curl_getinfo($ch);
+
+			$a->save_timestamp($stamp1, "network");
+
+			// if its a link to a picture then embed this picture
+			if (substr($curl_info["content_type"], 0, 6) == "image/") {
+				$text = "[img]" . $match[1] . "[/img]";
+			} else {
+				$text = "[img]" . $match[2] . "[/img]";
+
+				// if its not a picture then look if its a page that contains a picture link
+				$body = Network::fetchUrl($match[1]);
+
+				$doc = new DOMDocument();
+				@$doc->loadHTML($body);
+				$xpath = new DomXPath($doc);
+				$list = $xpath->query("//meta[@name]");
+				foreach ($list as $node) {
+					$attr = [];
+					if ($node->attributes->length) {
+						foreach ($node->attributes as $attribute) {
+							$attr[$attribute->name] = $attribute->value;
+						}
+					}
+
+					if (strtolower($attr["name"]) == "twitter:image") {
+						$text = "[img]" . $attr["content"] . "[/img]";
+					}
+				}
+			}
+			Cache::set($match[1], $text);
+		}
+
+		return $text;
+	}
+
+	public static function cleanPictureLinks($text)
+	{
+		$return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
+		return $return;
+	}
+
+	private static function textHighlightCallback($match)
+	{
+		if (in_array(strtolower($match[1]),
+				['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
+				'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh'])
+		) {
+			return text_highlight($match[2], strtolower($match[1]));
+		}
+		return $match[0];
+	}
+
+	/**
+	 * @brief Converts a BBCode message to HTML message
+	 *
+	 * BBcode 2 HTML was written by WAY2WEB.net
+	 * extended to work with Mistpark/Friendica - Mike Macgirvin
+	 *
+	 * Simple HTML values meaning:
+	 * - 0: Friendica display
+	 * - 1: Unused
+	 * - 2: Used for Facebook, Google+, Windows Phone push, Friendica API
+	 * - 3: Used before converting to Markdown in bb2diaspora.php
+	 * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
+	 * - 5: Unused
+	 * - 6: Used for Appnet
+	 * - 7: Used for dfrn, OStatus
+	 * - 8: Used for WP backlink text setting
+	 *
+	 * @param string $text
+	 * @param bool   $preserve_nl
+	 * @param bool   $try_oembed
+	 * @param int    $simple_html
+	 * @param bool   $for_plaintext
+	 * @return string
+	 */
+	public static function convert($text, $preserve_nl = false, $try_oembed = true, $simple_html = false, $for_plaintext = false)
+	{
+		$a = get_app();
+
+		/*
+		 * preg_match_callback function to replace potential Oembed tags with Oembed content
+		 *
+		 * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
+		 * $match[1] = $url
+		 * $match[2] = $title or absent
+		 */
+		$try_oembed_callback = function ($match)
+		{
+			$url = $match[1];
+			$title = defaults($match, 2, null);
+
+			try {
+				$return = OEmbed::getHTML($url, $title);
+			} catch (Exception $ex) {
+				$return = $match[0];
+			}
+
+			return $return;
+		};
+
+		// Hide all [noparse] contained bbtags by spacefying them
+		// POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?
+
+		$text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::escapeNoparseCallback', $text);
+		$text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::escapeNoparseCallback', $text);
+		$text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::escapeNoparseCallback', $text);
+
+		// Remove the abstract element. It is a non visible element.
+		$text = self::stripAbstract($text);
+
+		// Move all spaces out of the tags
+		$text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $text);
+		$text = preg_replace("/(\s*)\[\/(\w*)\]/ism", '[/$2]$1', $text);
+
+		// Extract the private images which use data urls since preg has issues with
+		// large data sizes. Stash them away while we do bbcode conversion, and then put them back
+		// in after we've done all the regex matching. We cannot use any preg functions to do this.
+
+		$extracted = self::extractImagesFromItemBody($text);
+		$text = $extracted['body'];
+		$saved_image = $extracted['images'];
+
+		// If we find any event code, turn it into an event.
+		// After we're finished processing the bbcode we'll
+		// replace all of the event code with a reformatted version.
+
+		$ev = bbtoevent($text);
+
+		// Replace any html brackets with HTML Entities to prevent executing HTML or script
+		// Don't use strip_tags here because it breaks [url] search by replacing & with amp
+
+		$text = str_replace("<", "&lt;", $text);
+		$text = str_replace(">", "&gt;", $text);
+
+		// remove some newlines before the general conversion
+		$text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $text);
+		$text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $text);
+
+		$text = preg_replace("/\n\[code\]/ism", "[code]", $text);
+		$text = preg_replace("/\[\/code\]\n/ism", "[/code]", $text);
+
+		// when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
+		if (!$try_oembed) {
+			$text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text);
+		}
+
+		// Check for [code] text here, before the linefeeds are messed with.
+		// The highlighter will unescape and re-escape the content.
+		if (strpos($text, '[code=') !== false) {
+			$text = preg_replace_callback("/\[code=(.*?)\](.*?)\[\/code\]/ism", 'self::textHighlightCallback', $text);
+		}
+		// Convert new line chars to html <br /> tags
+
+		// nlbr seems to be hopelessly messed up
+		//	$Text = nl2br($Text);
+
+		// We'll emulate it.
+
+		$text = trim($text);
+		$text = str_replace("\r\n", "\n", $text);
+
+		// removing multiplicated newlines
+		if (Config::get("system", "remove_multiplicated_lines")) {
+			$search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
+					"\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
+			$replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
+					"[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
+			do {
+				$oldtext = $text;
+				$text = str_replace($search, $replace, $text);
+			} while ($oldtext != $text);
+		}
+
+		// Set up the parameters for a URL search string
+		$URLSearchString = "^\[\]";
+		// Set up the parameters for a MAIL search string
+		$MAILSearchString = $URLSearchString;
+
+		// if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
+		if (!$for_plaintext) {
+			// Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
+			// Currently disabled, since the function is too greedy
+			// $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
+			$autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
+			$text = preg_replace($autolink_regex, '$1[url]$2[/url]', $text);
+			if ($simple_html == 7) {
+				$text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForMastodonCallback', $text);
+				$text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForMastodonCallback', $text);
+			}
+		} else {
+			$text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $text);
+			$text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::removePictureLinksCallback', $text);
+		}
+
+
+		// Handle attached links or videos
+		$text = self::convertAttachment($text, $simple_html, $try_oembed);
+
+		$text = str_replace(["\r","\n"], ['<br />', '<br />'], $text);
+
+		if ($preserve_nl) {
+			$text = str_replace(["\n", "\r"], ['', ''], $text);
+		}
+
+		// Remove all hashtag addresses
+		if ((!$try_oembed || $simple_html) && !in_array($simple_html, [3, 7])) {
+			$text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $text);
+		} elseif ($simple_html == 3) {
+			// The ! is converted to @ since Diaspora only understands the @
+			$text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+				'@<a href="$2">$3</a>',
+				$text);
+		} elseif ($simple_html == 7) {
+			$text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+				'$1<span class="vcard"><a href="$2" class="url" title="$3"><span class="fn nickname mention">$3</span></a></span>',
+				$text);
+		} elseif (!$simple_html) {
+			$text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+				'$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
+				$text);
+		}
+
+		// Bookmarks in red - will be converted to bookmarks in friendica
+		$text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text);
+		$text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text);
+		$text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
+					"[bookmark=$1]$2[/bookmark]", $text);
+
+		if (in_array($simple_html, [2, 6, 7, 8, 9])) {
+			$text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "self::expandLinksCallback", $text);
+			//$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
+			$text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$text);
+		}
+
+		if ($simple_html == 5) {
+			$text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $text);
+		}
+
+		// Perform URL Search
+		if ($try_oembed) {
+			$text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text);
+		}
+
+		if ($simple_html == 5) {
+			$text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $text);
+		} else {
+			$text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text);
+		}
+
+		// Handle Diaspora posts
+		$text = preg_replace_callback(
+			"&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
+			function ($match) {
+				return "[url=" . System::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]";
+			}, $text
+		);
+
+		// Server independent link to posts and comments
+		// See issue: https://github.com/diaspora/diaspora_federation/issues/75
+		$expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
+		$text = preg_replace($expression, System::baseUrl()."/display/$1", $text);
+
+		$text = preg_replace("/([#])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+					'$1<a href="' . System::baseUrl() . '/search?tag=$3" class="tag" title="$3">$3</a>', $text);
+
+		$text = preg_replace("/\[url\=([$URLSearchString]*)\]#(.*?)\[\/url\]/ism",
+					'#<a href="' . System::baseUrl() . '/search?tag=$2" class="tag" title="$2">$2</a>', $text);
+
+		$text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $text);
+		$text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
+		//$Text = preg_replace("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
+
+		// Red compatibility, though the link can't be authenticated on Friendica
+		$text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
+
+
+		// we may need to restrict this further if it picks up too many strays
+		// link acct:user@host to a webfinger profile redirector
+
+		$text = preg_replace('/acct:([^@]+)@((?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63})/', '<a href="' . System::baseUrl() . '/acctlink?addr=$1@$2" target="extlink">acct:$1@$2</a>', $text);
+
+		// Perform MAIL Search
+		$text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $text);
+		$text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $text);
+
+		// leave open the posibility of [map=something]
+		// this is replaced in prepare_body() which has knowledge of the item location
+
+		if (strpos($text, '[/map]') !== false) {
+			$text = preg_replace_callback(
+				"/\[map\](.*?)\[\/map\]/ism",
+				function ($match) {
+					// the extra space in the following line is intentional
+					// Whyyy? - @MrPetovan
+					return str_replace($match[0], '<div class="map"  >' . Map::byLocation($match[1]) . '</div>', $match[0]);
+				},
+				$text
+			);
+		}
+		if (strpos($text, '[map=') !== false) {
+			$text = preg_replace_callback(
+				"/\[map=(.*?)\]/ism",
+				function ($match) {
+					// the extra space in the following line is intentional
+					// Whyyy? - @MrPetovan
+					return str_replace($match[0], '<div class="map"  >' . Map::byCoordinates(str_replace('/', ' ', $match[1])) . '</div>', $match[0]);
+				},
+				$text
+			);
+		}
+		if (strpos($text, '[map]') !== false) {
+			$text = preg_replace("/\[map\]/", '<div class="map"></div>', $text);
+		}
+
+		// Check for headers
+		$text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $text);
+		$text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $text);
+		$text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $text);
+		$text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $text);
+		$text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $text);
+		$text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $text);
+
+		// Check for paragraph
+		$text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $text);
+
+		// Check for bold text
+		$text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $text);
+
+		// Check for Italics text
+		$text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $text);
+
+		// Check for Underline text
+		$text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $text);
+
+		// Check for strike-through text
+		$text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<strike>$1</strike>', $text);
+
+		// Check for over-line text
+		$text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $text);
+
+		// Check for colored text
+		$text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $text);
+
+		// Check for sized text
+		// [size=50] --> font-size: 50px (with the unit).
+		$text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $text);
+		$text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $text);
+
+		// Check for centered text
+		$text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $text);
+
+		// Check for list text
+		$text = str_replace("[*]", "<li>", $text);
+
+		// Check for style sheet commands
+		$text = preg_replace_callback(
+			"(\[style=(.*?)\](.*?)\[\/style\])ism",
+			function ($match) {
+				return "<span style=\"" . self::cleanCss($match[1]) . ";\">" . $match[2] . "</span>";
+			},
+			$text
+		);
+
+		// Check for CSS classes
+		$text = preg_replace_callback(
+			"(\[class=(.*?)\](.*?)\[\/class\])ism",
+			function ($match) {
+				return "<span class=\"" . self::cleanCss($match[1]) . "\">" . $match[2] . "</span>";
+			},
+			$text
+		);
+
+		// handle nested lists
+		$endlessloop = 0;
+
+		while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) ||
+			   ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) ||
+			   ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) ||
+			   ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) {
+			$text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
+			$text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $text);
+			$text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
+			$text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $text);
+			$text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $text);
+			$text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $text);
+			$text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $text);
+			$text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
+			$text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
+			$text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $text);
+		}
+
+		$text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $text);
+		$text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $text);
+		$text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $text);
+		$text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $text);
+
+		$text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $text);
+		$text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $text);
+
+		$text = str_replace('[hr]', '<hr />', $text);
+
+		// This is actually executed in prepare_body()
+
+		$text = str_replace('[nosmile]', '', $text);
+
+		// Check for font change text
+		$text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $text);
+
+		// Declare the format for [code] layout
+
+		$CodeLayout = '<code>$1</code>';
+		// Check for [code] text
+		$text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $text);
+
+		// Declare the format for [spoiler] layout
+		$SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';
+
+		// Check for [spoiler] text
+		// handle nested quotes
+		$endlessloop = 0;
+		while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
+			$text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", "$SpoilerLayout", $text);
+		}
+
+		// Check for [spoiler=Author] text
+
+		$t_wrote = L10n::t('$1 wrote:');
+
+		// handle nested quotes
+		$endlessloop = 0;
+		while ((strpos($text, "[/spoiler]")!== false)  && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
+			$text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
+						 "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
+						 $text);
+		}
+
+		// Declare the format for [quote] layout
+		$QuoteLayout = '<blockquote>$1</blockquote>';
+
+		// Check for [quote] text
+		// handle nested quotes
+		$endlessloop = 0;
+		while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) {
+			$text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text);
+		}
+
+		// Check for [quote=Author] text
+
+		$t_wrote = L10n::t('$1 wrote:');
+
+		// handle nested quotes
+		$endlessloop = 0;
+		while ((strpos($text, "[/quote]")!== false)  && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) {
+			$text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
+						 "<br /><strong class=".'"author"'.">" . $t_wrote . "</strong><blockquote>$2</blockquote>",
+						 $text);
+		}
+
+
+		// [img=widthxheight]image source[/img]
+		$text = preg_replace_callback(
+			"/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism",
+			function ($matches) {
+				if (strpos($matches[3], "data:image/") === 0) {
+					return $matches[0];
+				}
+
+				$matches[3] = proxy_url($matches[3]);
+				return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
+			},
+			$text
+		);
+
+		$text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $text);
+		$text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $text);
+
+		// Images
+		// [img]pathtoimage[/img]
+		$text = preg_replace_callback(
+			"/\[img\](.*?)\[\/img\]/ism",
+			function ($matches) {
+				if (strpos($matches[1], "data:image/") === 0) {
+					return $matches[0];
+				}
+
+				$matches[1] = proxy_url($matches[1]);
+				return "[img]" . $matches[1] . "[/img]";
+			},
+			$text
+		);
+
+		$text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
+		$text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
+
+		// Shared content
+		$text = preg_replace_callback("/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
+			function ($match) use ($simple_html) {
+				return self::convertShare($match, $simple_html);
+			}, $text);
+
+		$text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . L10n::t('Encrypted content') . '" /><br />', $text);
+		$text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $text);
+		//$Text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);
+
+		// Try to Oembed
+		if ($try_oembed) {
+			$text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4))\[\/video\]/ism", '<video src="$1" controls="controls" width="' . $a->videowidth . '" height="' . $a->videoheight . '" loop="true"><a href="$1">$1</a></video>', $text);
+			$text = preg_replace("/\[audio\](.*?\.(ogg|ogv|oga|ogm|webm|mp4|mp3))\[\/audio\]/ism", '<audio src="$1" controls="controls"><a href="$1">$1</a></audio>', $text);
+
+			$text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text);
+			$text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text);
+		} else {
+			$text = preg_replace("/\[video\](.*?)\[\/video\]/",
+						'<a href="$1" target="_blank">$1</a>', $text);
+			$text = preg_replace("/\[audio\](.*?)\[\/audio\]/",
+						'<a href="$1" target="_blank">$1</a>', $text);
+		}
+
+		// html5 video and audio
+
+
+		if ($try_oembed) {
+			$text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $text);
+		} else {
+			$text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $text);
+		}
+
+		// Youtube extensions
+		if ($try_oembed) {
+			$text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
+			$text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
+			$text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
+		}
+
+		$text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
+		$text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
+		$text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
+
+		if ($try_oembed) {
+			$text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://www.youtube.com/embed/$1" frameborder="0" ></iframe>', $text);
+		} else {
+			$text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
+						'<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $text);
+		}
+
+		if ($try_oembed) {
+			$text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
+			$text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
+		}
+
+		$text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
+		$text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
+
+		if ($try_oembed) {
+			$text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://player.vimeo.com/video/$1" frameborder="0" ></iframe>', $text);
+		} else {
+			$text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
+						'<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $text);
+		}
+
+		// oembed tag
+		$text = OEmbed::BBCode2HTML($text);
+
+		// Avoid triple linefeeds through oembed
+		$text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $text);
+
+		// If we found an event earlier, strip out all the event code and replace with a reformatted version.
+		// Replace the event-start section with the entire formatted event. The other bbcode is stripped.
+		// Summary (e.g. title) is required, earlier revisions only required description (in addition to
+		// start which is always required). Allow desc with a missing summary for compatibility.
+
+		if ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
+			$sub = format_event_html($ev, $simple_html);
+
+			$text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
+			$text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
+			$text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text);
+			$text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text);
+			$text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text);
+			$text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $text);
+			$text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text);
+		}
+
+		// Replace non graphical smilies for external posts
+		if ($simple_html) {
+			$text = Smilies::replace($text, false, true);
+		}
+
+		// Replace inline code blocks
+		$text = preg_replace_callback("|(?!<br[^>]*>)<code>([^<]*)</code>(?!<br[^>]*>)|ism",
+			function ($match) use ($simple_html) {
+				$return = '<key>' . $match[1] . '</key>';
+				// Use <code> for Diaspora inline code blocks
+				if ($simple_html === 3) {
+					$return = '<code>' . $match[1] . '</code>';
+				}
+				return $return;
+			}
+		, $text);
+
+		// Unhide all [noparse] contained bbtags unspacefying them
+		// and triming the [noparse] tag.
+
+		$text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::unescapeNoparseCallback', $text);
+		$text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::unescapeNoparseCallback', $text);
+		$text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::unescapeNoparseCallback', $text);
+
+
+		$text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $text);
+		$text = preg_replace('/\&\#039\;/', '\'', $text);
+		$text = preg_replace('/\&quot\;/', '"', $text);
+
+		// fix any escaped ampersands that may have been converted into links
+		$text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
+
+		// sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
+		$allowed_src_protocols = ['http', 'redir', 'cid'];
+		$text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
+					 '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $text);
+
+		// sanitize href attributes (only whitelisted protocols URLs)
+		// default value for backward compatibility
+		$allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);
+
+		// Always allowed protocol even if config isn't set or not including it
+		$allowed_link_protocols[] = 'http';
+		$allowed_link_protocols[] = 'redir/';
+
+		$regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
+		$text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . L10n::t('Invalid link protocol') . '">', $text);
+
+		if ($saved_image) {
+			$text = self::interpolateSavedImagesIntoItemBody($text, $saved_image);
+		}
+
+		// Clean up the HTML by loading and saving the HTML with the DOM.
+		// Bad structured html can break a whole page.
+		// For performance reasons do it only with ativated item cache or at export.
+		if (!$try_oembed || (get_itemcachepath() != "")) {
+			$doc = new DOMDocument();
+			$doc->preserveWhiteSpace = false;
+
+			$text = mb_convert_encoding($text, 'HTML-ENTITIES', "UTF-8");
+
+			$doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
+			$encoding = '<?xml encoding="UTF-8">';
+			@$doc->loadHTML($encoding.$doctype."<html><body>".$text."</body></html>");
+			$doc->encoding = 'UTF-8';
+			$text = $doc->saveHTML();
+			$text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $text);
+
+			$text = str_replace('<br></li>', '</li>', $text);
+
+			//$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
+		}
+
+		// Clean up some useless linebreaks in lists
+		//$Text = str_replace('<br /><ul', '<ul ', $Text);
+		//$Text = str_replace('</ul><br />', '</ul>', $Text);
+		//$Text = str_replace('</li><br />', '</li>', $Text);
+		//$Text = str_replace('<br /><li>', '<li>', $Text);
+		//$Text = str_replace('<br /><ul', '<ul ', $Text);
+
+		Addon::callHooks('bbcode', $text);
+
+		return trim($text);
+	}
+
+	/**
+	 * @brief Strips the "abstract" tag from the provided text
+	 *
+	 * @param string $text The text with BBCode
+	 * @return string The same text - but without "abstract" element
+	 */
+	public static function stripAbstract($text)
+	{
+		$text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", '', $text);
+		$text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", '', $text);
+
+		return $text;
+	}
+
+	/**
+	 * @brief Returns the value of the "abstract" element
+	 *
+	 * @param string $text The text that maybe contains the element
+	 * @param string $addon The addon for which the abstract is meant for
+	 * @return string The abstract
+	 */
+	private static function getAbstract($text, $addon = "")
+	{
+		$abstract = "";
+		$abstracts = [];
+		$addon = strtolower($addon);
+
+		if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism", $text, $results, PREG_SET_ORDER)) {
+			foreach ($results AS $result) {
+				$abstracts[strtolower($result[1])] = $result[2];
+			}
+		}
+
+		if (isset($abstracts[$addon])) {
+			$abstract = $abstracts[$addon];
+		}
+
+		if ($abstract == "" && preg_match("/\[abstract\](.*?)\[\/abstract\]/ism", $text, $result)) {
+			$abstract = $result[1];
+		}
+
+		return $abstract;
+	}
 }
diff --git a/src/Content/Text/Plaintext.php b/src/Content/Text/Plaintext.php
index eb17fd0a26..3b692fd965 100644
--- a/src/Content/Text/Plaintext.php
+++ b/src/Content/Text/Plaintext.php
@@ -34,4 +34,41 @@ class Plaintext
 
 		return $msg;
 	}
+
+	/**
+	 * Returns the character positions of the provided boundaries, optionally skipping a number of first occurrences
+	 *
+	 * @param string $text        Text to search
+	 * @param string $open        Left boundary
+	 * @param string $close       Right boundary
+	 * @param int    $occurrences Number of first occurrences to skip
+	 * @return boolean|array
+	 */
+	public static function getBoundariesPosition($text, $open, $close, $occurrences = 0)
+	{
+		if ($occurrences < 0) {
+			$occurrences = 0;
+		}
+
+		$start_pos = -1;
+		for ($i = 0; $i <= $occurrences; $i++) {
+			if ($start_pos !== false) {
+				$start_pos = strpos($text, $open, $start_pos + 1);
+			}
+		}
+
+		if ($start_pos === false) {
+			return false;
+		}
+
+		$end_pos = strpos($text, $close, $start_pos);
+
+		if ($end_pos === false) {
+			return false;
+		}
+
+		$res = ['start' => $start_pos, 'end' => $end_pos];
+
+		return $res;
+	}
 }
diff --git a/src/Core/Protocol.php b/src/Core/Protocol.php
new file mode 100644
index 0000000000..9caa0ab152
--- /dev/null
+++ b/src/Core/Protocol.php
@@ -0,0 +1,124 @@
+<?php
+/*
+ * @file src/Core/Protocol.php
+ */
+namespace Friendica\Core;
+
+use Friendica\Util\Network;
+
+/**
+ * Manage compatibility with federated networks
+ *
+ * @author Hypolite Petovan <mrpetovan@gmail.com>
+ */
+class Protocol
+{
+	const DFRN      = 'dfrn';    // Friendica, Mistpark, other DFRN implementations
+	const DIASPORA  = 'dspr';    // Diaspora
+	const DIASPORA2 = 'dspc';    // Diaspora connector
+	const STATUSNET = 'stac';    // Statusnet connector
+	const OSTATUS   = 'stat';    // GNU-social, Pleroma, Mastodon, other OStatus implementations
+	const FEED      = 'feed';    // RSS/Atom feeds with no known "post/notify" protocol
+	const MAIL      = 'mail';    // IMAP/POP
+	const XMPP      = 'xmpp';    // XMPP - Currently unsupported
+
+	const FACEBOOK  = 'face';    // Facebook API
+	const LINKEDIN  = 'lnkd';    // LinkedIn
+	const MYSPACE   = 'mysp';    // MySpace - Currently unsupported
+	const GPLUS     = 'goog';    // Google+
+	const PUMPIO    = 'pump';    // pump.io
+	const TWITTER   = 'twit';    // Twitter
+	const APPNET    = 'apdn';    // app.net - Dead protocol
+
+	const NEWS      = 'nntp';    // Network News Transfer Protocol - Currently unsupported
+	const ICALENDAR = 'ical';    // iCalendar - Currently unsupported
+	const PNUT      = 'pnut';    // pnut.io - Currently unsupported
+	const ZOT       = 'zot!';    // Zot! - Currently unsupported
+
+	const PHANTOM   = 'unkn';    // Place holder
+
+	/**
+	 * Returns the address string for the provided profile URL
+	 *
+	 * @param string $profile_url
+	 * @return string
+	 * @throws Exception
+	 */
+	public static function getAddrFromProfileUrl($profile_url)
+	{
+		$network = self::matchByProfileUrl($profile_url, $matches);
+
+		if ($network === self::PHANTOM) {
+			throw new Exception('Unknown network for profile URL: ' . $profile_url);
+		}
+
+		$addr = $matches[2] . '@' . $matches[1];
+
+		return $addr;
+	}
+
+	/**
+	 * Guesses the network from a profile URL
+	 *
+	 * @param string $profile_url
+	 * @param array  $matches     preg_match return array: [0] => Full match [1] => hostname [2] => username
+	 * @return type
+	 */
+	public static function matchByProfileUrl($profile_url, &$matches = [])
+	{
+		if (preg_match('=https?://(twitter\.com)/(.*)=ism', $profile_url, $matches)) {
+			return self::TWITTER;
+		}
+
+		if (preg_match('=https?://(alpha\.app\.net)/(.*)=ism', $profile_url, $matches)) {
+			return self::APPNET;
+		}
+
+		if (preg_match('=https?://(plus\.google\.com)/(.*)=ism', $profile_url, $matches)) {
+			return self::GPLUS;
+		}
+
+		if (preg_match('=https?://(.*)/profile/(.*)=ism', $profile_url, $matches)) {
+			return self::DFRN;
+		}
+
+		if (preg_match('=https?://(.*)/u/(.*)=ism', $profile_url, $matches)) {
+			return self::DIASPORA;
+		}
+
+		if (preg_match('=https?://(.*)/channel/(.*)=ism', $profile_url, $matches)) {
+			// RedMatrix/Hubzilla is identified as Diaspora - friendica can't connect directly to it
+			return self::DIASPORA;
+		}
+
+		if (preg_match('=https?://(.*)/user/(.*)=ism', $profile_url, $matches)) {
+			$statusnet_host = $matches[1];
+			$statusnet_user = $matches[2];
+			$UserData = Network::fetchUrl('http://' . $statusnet_host . '/api/users/show.json?user_id=' . $statusnet_user);
+			$user = json_decode($UserData);
+			if ($user) {
+				$matches[2] = $user->screen_name;
+				return self::STATUSNET;
+			}
+		}
+
+		// pumpio (http://host.name/user)
+		if (preg_match('=https?://([\.\w]+)/([\.\w]+)$=ism', $profile_url, $matches)) {
+			return self::PUMPIO;
+		}
+
+		return self::PHANTOM;
+	}
+
+	/**
+	 * Returns a formatted mention from a profile URL and a display name
+	 *
+	 * @param string $profile_url
+	 * @param string $display_name
+	 * @return string
+	 */
+	public static function formatMention($profile_url, $display_name)
+	{
+		return $display_name . '(' . self::getAddrFromProfileUrl($profile_url) . ')';
+	}
+}
diff --git a/src/Model/Conversation.php b/src/Model/Conversation.php
index e6888ca8f6..3f9b3c7e5e 100644
--- a/src/Model/Conversation.php
+++ b/src/Model/Conversation.php
@@ -11,6 +11,14 @@ require_once "include/dba.php";
 
 class Conversation
 {
+	const PROTOCOL_UNKNOWN         = 0;
+	const PROTOCOL_DFRN            = 1;
+	const PROTOCOL_DIASPORA        = 2;
+	const PROTOCOL_OSTATUS_SALMON  = 3;
+	const PROTOCOL_OSTATUS_FEED    = 4; // Deprecated
+	const PROTOCOL_GS_CONVERSATION = 5; // Deprecated
+	const PROTOCOL_SPLITTED_CONV   = 6;
+
 	/**
 	 * @brief Store the conversation data
 	 *
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 6ec83151f7..9f690847a7 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -10,6 +10,7 @@ namespace Friendica\Protocol;
 
 use Friendica\App;
 use Friendica\Content\OEmbed;
+use Friendica\Content\Text\BBCode;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
@@ -29,8 +30,6 @@ use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\XML;
-use Friendica\Content\Text\BBCode;
-
 use dba;
 use DOMDocument;
 use DOMXPath;
@@ -929,7 +928,7 @@ class DFRN
 		}
 
 		// Remove the abstract element. It is only locally important.
-		$body = remove_abstract($body);
+		$body = BBCode::stripAbstract($body);
 
 		if ($type == 'html') {
 			$htmlbody = $body;
diff --git a/view/theme/frio/theme.php b/view/theme/frio/theme.php
index 3c4d5120cf..3f401612e2 100644
--- a/view/theme/frio/theme.php
+++ b/view/theme/frio/theme.php
@@ -6,7 +6,9 @@
  * Author: Rabuzarus <https://friendica.kommune4.de/profile/rabuzarus>
  *
  */
+
 use Friendica\App;
+use Friendica\Content\Text\Plaintext;
 use Friendica\Content\Widget;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
@@ -15,7 +17,6 @@ use Friendica\Core\PConfig;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
 use Friendica\Model\Profile;
-use Friendica\Object\Image;
 
 $frio = "view/theme/frio";
 
@@ -90,10 +91,8 @@ function frio_uninstall()
  */
 function frio_item_photo_links(App $a, &$body_info)
 {
-	$phototypes = Image::supportedTypes();
-	$occurence = 1;
-	$p = bb_find_open_close($body_info['html'], "<a", ">");
-
+	$occurence = 0;
+	$p = Plaintext::getBoundariesPosition($body_info['html'], "<a", ">");
 	while ($p !== false && ($occurence++ < 500)) {
 		$link = substr($body_info['html'], $p['start'], $p['end'] - $p['start']);
 		$matches = [];
@@ -112,7 +111,7 @@ function frio_item_photo_links(App $a, &$body_info)
 			$body_info['html'] = str_replace($link, $newlink, $body_info['html']);
 		}
 
-		$p = bb_find_open_close($body_info['html'], "<a", ">", $occurence);
+		$p = Plaintext::getBoundariesPosition($body_info['html'], "<a", ">", $occurence);
 	}
 }
 
@@ -302,7 +301,7 @@ function frio_acl_lookup(App $a, &$results)
 		$search_txt = dbesc(protect_sprintf(preg_quote($results["search"])));
 		$searching = true;
 	}
-	
+
 	$sql_extra = '';
 	if ($searching) {
 		$sql_extra .= " AND (`attag` LIKE '%%" . dbesc($search_txt) . "%%' OR `name` LIKE '%%" . dbesc($search_txt) . "%%' OR `nick` LIKE '%%" . dbesc($search_txt) . "%%') ";
diff --git a/view/theme/frost/theme.php b/view/theme/frost/theme.php
index 1692560341..dd1a0cebaf 100644
--- a/view/theme/frost/theme.php
+++ b/view/theme/frost/theme.php
@@ -10,9 +10,9 @@
  */
 
 use Friendica\App;
+use Friendica\Content\Text\Plaintext;
 use Friendica\Core\Addon;
 use Friendica\Core\System;
-use Friendica\Object\Image;
 
 function frost_init(App $a) {
 	$a->videowidth = 400;
@@ -49,10 +49,8 @@ function frost_uninstall() {
 
 function frost_item_photo_links(App $a, &$body_info)
 {
-	$phototypes = Image::supportedTypes();
-
-	$occurence = 1;
-	$p = bb_find_open_close($body_info['html'], "<a", ">");
+	$occurence = 0;
+	$p = Plaintext::getBoundariesPosition($body_info['html'], '<a', '>');
 	while($p !== false && ($occurence++ < 500)) {
 		$link = substr($body_info['html'], $p['start'], $p['end'] - $p['start']);
 
@@ -73,7 +71,7 @@ function frost_item_photo_links(App $a, &$body_info)
 
 		}
 
-		$p = bb_find_open_close($body_info['html'], "<a", ">", $occurence);
+		$p = Plaintext::getBoundariesPosition($body_info['html'], '<a', '>', $occurence);
 	}
 }