diff --git a/blogger/blogger.php b/blogger/blogger.php
index 8d8051b0..496a47c8 100644
--- a/blogger/blogger.php
+++ b/blogger/blogger.php
@@ -13,7 +13,7 @@ use Friendica\Core\L10n;
 use Friendica\Core\Logger;
 use Friendica\Core\PConfig;
 use Friendica\Util\Network;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 function blogger_install()
 {
@@ -179,14 +179,14 @@ function blogger_send(App $a, array &$b)
 		return;
 	}
 
-	$bl_username = Strings::escape(PConfig::get($b['uid'], 'blogger', 'bl_username'));
-	$bl_password = Strings::escape(PConfig::get($b['uid'], 'blogger', 'bl_password'));
+	$bl_username = XML::escape(PConfig::get($b['uid'], 'blogger', 'bl_username'));
+	$bl_password = XML::escape(PConfig::get($b['uid'], 'blogger', 'bl_password'));
 	$bl_blog = PConfig::get($b['uid'], 'blogger', 'bl_blog');
 
 	if ($bl_username && $bl_password && $bl_blog) {
 		$title = '<title>' . (($b['title']) ? $b['title'] : L10n::t('Post from Friendica')) . '</title>';
 		$post = $title . BBCode::convert($b['body']);
-		$post = Strings::escape($post);
+		$post = XML::escape($post);
 
 		$xml = <<< EOT
 <?xml version=\"1.0\" encoding=\"utf-8\"?>
diff --git a/dwpost/dwpost.php b/dwpost/dwpost.php
index b0bb7264..28ae2d97 100644
--- a/dwpost/dwpost.php
+++ b/dwpost/dwpost.php
@@ -17,7 +17,7 @@ use Friendica\Core\PConfig;
 use Friendica\Database\DBA;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 function dwpost_install()
 {
@@ -190,7 +190,7 @@ function dwpost_send(App $a, array &$b)
 	if ($dw_username && $dw_password && $dw_blog) {
 		$title = $b['title'];
 		$post = BBCode::convert($b['body']);
-		$post = Strings::escape($post);
+		$post = XML::escape($post);
 		$tags = dwpost_get_tags($b['tag']);
 
 		$date = DateTimeFormat::convert($b['created'], $tz);
diff --git a/ijpost/ijpost.php b/ijpost/ijpost.php
index 1203d2f4..d2a3071e 100644
--- a/ijpost/ijpost.php
+++ b/ijpost/ijpost.php
@@ -15,7 +15,7 @@ use Friendica\Core\Logger;
 use Friendica\Core\PConfig;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 function ijpost_install()
 {
@@ -186,7 +186,7 @@ function ijpost_send(&$a, &$b)
 	if ($ij_username && $ij_password && $ij_blog) {
 		$title = $b['title'];
 		$post = BBCode::convert($b['body']);
-		$post = Strings::escape($post);
+		$post = XML::escape($post);
 		$tags = ijpost_get_tags($b['tag']);
 
 		$date = DateTimeFormat::convert($b['created'], $tz);
diff --git a/ljpost/ljpost.php b/ljpost/ljpost.php
index 5c30e09d..c60af03c 100644
--- a/ljpost/ljpost.php
+++ b/ljpost/ljpost.php
@@ -15,7 +15,7 @@ use Friendica\Core\Logger;
 use Friendica\Core\PConfig;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 function ljpost_install() {
     Addon::registerHook('post_local',           'addon/ljpost/ljpost.php', 'ljpost_post_local');
@@ -170,20 +170,20 @@ function ljpost_send(&$a,&$b) {
 	if($x && strlen($x[0]['timezone']))
 		$tz = $x[0]['timezone'];
 
-	$lj_username = Strings::escape(PConfig::get($b['uid'],'ljpost','lj_username'));
-	$lj_password = Strings::escape(PConfig::get($b['uid'],'ljpost','lj_password'));
-	$lj_journal = Strings::escape(PConfig::get($b['uid'],'ljpost','lj_journal'));
+	$lj_username = XML::escape(PConfig::get($b['uid'],'ljpost','lj_username'));
+	$lj_password = XML::escape(PConfig::get($b['uid'],'ljpost','lj_password'));
+	$lj_journal = XML::escape(PConfig::get($b['uid'],'ljpost','lj_journal'));
 //	if(! $lj_journal)
 //		$lj_journal = $lj_username;
 
-	$lj_blog = Strings::escape(PConfig::get($b['uid'],'ljpost','lj_blog'));
+	$lj_blog = XML::escape(PConfig::get($b['uid'],'ljpost','lj_blog'));
 	if(! strlen($lj_blog))
-		$lj_blog = Strings::escape('http://www.livejournal.com/interface/xmlrpc');
+		$lj_blog = XML::escape('http://www.livejournal.com/interface/xmlrpc');
 
 	if($lj_username && $lj_password && $lj_blog) {
-		$title = Strings::escape($b['title']);
+		$title = XML::escape($b['title']);
 		$post = BBCode::convert($b['body']);
-		$post = Strings::escape($post);
+		$post = XML::escape($post);
 		$tags = ljpost_get_tags($b['tag']);
 
 		$date = DateTimeFormat::convert($b['created'], $tz);
diff --git a/pumpio/pumpio.php b/pumpio/pumpio.php
index 7aa094c9..6d3fe62d 100644
--- a/pumpio/pumpio.php
+++ b/pumpio/pumpio.php
@@ -25,7 +25,7 @@ use Friendica\Model\Queue;
 use Friendica\Model\User;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 require 'addon/pumpio/oauth/http.php';
 require 'addon/pumpio/oauth/oauth_client.php';
@@ -982,7 +982,7 @@ function pumpio_dolike(App $a, $uid, $self, $post, $own_id, $threadcompletion =
 	$likedata['body'] = L10n::t('%1$s likes %2$s\'s %3$s', $author, $objauthor, $plink);
 
 	$likedata['object'] = '<object><type>' . ACTIVITY_OBJ_NOTE . '</type><local>1</local>' .
-		'<id>' . $orig_post['uri'] . '</id><link>' . Strings::escape('<link rel="alternate" type="text/html" href="' . Strings::escape($orig_post['plink']) . '" />') . '</link><title>' . $orig_post['title'] . '</title><content>' . $orig_post['body'] . '</content></object>';
+		'<id>' . $orig_post['uri'] . '</id><link>' . XML::escape('<link rel="alternate" type="text/html" href="' . XML::escape($orig_post['plink']) . '" />') . '</link><title>' . $orig_post['title'] . '</title><content>' . $orig_post['body'] . '</content></object>';
 
 	$ret = Item::insert($likedata);
 
diff --git a/qcomment/qcomment.php b/qcomment/qcomment.php
index 5089c27d..16c5a44c 100644
--- a/qcomment/qcomment.php
+++ b/qcomment/qcomment.php
@@ -20,7 +20,7 @@
 use Friendica\Core\Addon;
 use Friendica\Core\L10n;
 use Friendica\Core\PConfig;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 function qcomment_install() {
 	Addon::registerHook('addon_settings', 'addon/qcomment/qcomment.php', 'qcomment_addon_settings');
@@ -51,7 +51,7 @@ function qcomment_addon_settings(&$a, &$s)
 	$s .= '<div id="qcomment-wrapper">';
 	$s .= '<div id="qcomment-desc">' . L10n::t("Quick comments are found near comment boxes, sometimes hidden. Click them to provide simple replies.") . '</div>';
 	$s .= '<label id="qcomment-label" for="qcomment-words">' . L10n::t('Enter quick comments, one per line') . ' </label>';
-	$s .= '<textarea id="qcomment-words" type="text" name="qcomment-words" >' . htmlspecialchars(Strings::unescape($words)) . '</textarea>';
+	$s .= '<textarea id="qcomment-words" type="text" name="qcomment-words" >' . htmlspecialchars(XML::unescape($words)) . '</textarea>';
 	$s .= '</div><div class="clear"></div>';
 
 	$s .= '<div class="settings-submit-wrapper" ><input type="submit" id="qcomment-submit" name="qcomment-submit" class="settings-submit" value="' . L10n::t('Save Settings') . '" /></div>';
@@ -67,7 +67,7 @@ function qcomment_addon_settings_post(&$a, &$b)
 	}
 
 	if ($_POST['qcomment-submit']) {
-		PConfig::set(local_user(), 'qcomment', 'words', Strings::escape($_POST['qcomment-words']));
+		PConfig::set(local_user(), 'qcomment', 'words', XML::escape($_POST['qcomment-words']));
 		info(L10n::t('Quick Comment settings saved.') . EOL);
 	}
 }
diff --git a/wppost/wppost.php b/wppost/wppost.php
index 44a06016..47c30a59 100644
--- a/wppost/wppost.php
+++ b/wppost/wppost.php
@@ -14,7 +14,7 @@ use Friendica\Core\Logger;
 use Friendica\Core\PConfig;
 use Friendica\Database\DBA;
 use Friendica\Util\Network;
-use Friendica\Util\Strings;
+use Friendica\Util\XML;
 
 function wppost_install() {
     Addon::registerHook('post_local',           'addon/wppost/wppost.php', 'wppost_post_local');
@@ -217,8 +217,8 @@ function wppost_send(&$a,&$b) {
 		return;
 	}
 
-	$wp_username = Strings::escape(PConfig::get($b['uid'], 'wppost', 'wp_username'));
-	$wp_password = Strings::escape(PConfig::get($b['uid'], 'wppost',' wp_password'));
+	$wp_username = XML::(PConfig::get($b['uid'], 'wppost', 'wp_username'));
+	$wp_password = XML::escape(PConfig::get($b['uid'], 'wppost',' wp_password'));
 	$wp_blog = PConfig::get($b['uid'],'wppost','wp_blog');
 	$wp_backlink_text = PConfig::get($b['uid'],'wppost','wp_backlink_text');
 	if ($wp_backlink_text == '') {
@@ -295,7 +295,7 @@ function wppost_send(&$a,&$b) {
 				. $wp_backlink_text . '</a>' . EOL . EOL;
 		}
 
-		$post = Strings::escape($post);
+		$post = XML::escape($post);
 
 
 		$xml = <<< EOT