diff --git a/plugins/CasAuthentication/CasAuthenticationPlugin.php b/plugins/CasAuthentication/CasAuthenticationPlugin.php
index 7ac3594101..a2a2e95920 100644
--- a/plugins/CasAuthentication/CasAuthenticationPlugin.php
+++ b/plugins/CasAuthentication/CasAuthenticationPlugin.php
@@ -1,38 +1,30 @@
 <?php
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
- * StatusNet, the distributed open-source microblogging tool
- *
  * Plugin to enable Single Sign On via CAS (Central Authentication Service)
  *
- * PHP version 5
- *
- * LICENCE: This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
  * @category  Plugin
- * @package   StatusNet
+ * @package   GNUsocial
  * @author    Craig Andrews <candrews@integralblue.com>
  * @copyright 2009 Free Software Foundation, Inc http://www.fsf.org
- * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link      http://status.net/
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 
-if (!defined('STATUSNET') && !defined('LACONICA')) {
-    exit(1);
-}
-
-// We bundle the phpCAS library...
-set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/CAS');
+defined('GNUSOCIAL') || die();
 
 class CasAuthenticationPlugin extends AuthenticationPlugin
 {
@@ -44,68 +36,55 @@ class CasAuthenticationPlugin extends AuthenticationPlugin
     public $takeOverLogin = false;
     public $user_whitelist = null;
 
-    function checkPassword($username, $password)
+    public function checkPassword($username, $password)
     {
         global $casTempPassword;
         return ($casTempPassword == $password);
     }
 
-    function onAutoload($cls)
+    public function onArgsInitialize(&$args)
     {
-        switch ($cls)
-        {
-         case 'phpCAS':
-            require_once(INSTALLDIR.'/plugins/CasAuthentication/extlib/CAS.php');
-            return false;
-        }
-
-        // if it's not our exception, try standard places
-        return parent::onAutoload($cls);
-    }
-
-    function onArgsInitialize(&$args)
-    {
-        if($this->takeOverLogin && $args['action'] == 'login')
-        {
+        if ($this->takeOverLogin && $args['action'] === 'login') {
             $args['action'] = 'caslogin';
         }
     }
 
-    function onStartInitializeRouter($m)
+    public function onStartInitializeRouter($m)
     {
         $m->connect('main/cas', array('action' => 'caslogin'));
         return true;
     }
 
-    function onEndLoginGroupNav($action)
+    public function onEndLoginGroupNav($action)
     {
         $action_name = $action->trimmed('action');
 
-        $action->menuItem(common_local_url('caslogin'),
-                          // TRANS: Menu item. CAS is Central Authentication Service.
-                          _m('CAS'),
-                          // TRANS: Tooltip for menu item. CAS is Central Authentication Service.
-                          _m('Login or register with CAS.'),
-                          $action_name === 'caslogin');
+        $action->menuItem(
+            common_local_url('caslogin'),
+            // TRANS: Menu item. CAS is Central Authentication Service.
+            _m('CAS'),
+            // TRANS: Tooltip for menu item. CAS is Central Authentication Service.
+            _m('Login or register with CAS.'),
+            ($action_name === 'caslogin')
+        );
 
         return true;
     }
 
-    function onEndShowPageNotice($action)
+    public function onEndShowPageNotice($action)
     {
         $name = $action->trimmed('action');
 
-        switch ($name)
-        {
-         case 'login':
-            // TRANS: Invitation to users with a CAS account to log in using the service.
-            // TRANS: "[CAS login]" is a link description. (%%action.caslogin%%) is the URL.
-            // TRANS: These two elements may not be separated.
-            $instr = _m('(Have an account with CAS? ' .
-              'Try our [CAS login](%%action.caslogin%%)!)');
-            break;
-         default:
-            return true;
+        switch ($name) {
+            case 'login':
+                // TRANS: Invitation to users with a CAS account to log in using the service.
+                // TRANS: "[CAS login]" is a link description. (%%action.caslogin%%) is the URL.
+                // TRANS: These two elements may not be separated.
+                $instr = _m('(Have an account with CAS? ' .
+                    'Try our [CAS login](%%action.caslogin%%)!)');
+                break;
+            default:
+                return true;
         }
 
         $output = common_markup_to_html($instr);
@@ -113,29 +92,29 @@ class CasAuthenticationPlugin extends AuthenticationPlugin
         return true;
     }
 
-    function onLoginAction($action, &$login)
+    public function onLoginAction($action, &$login)
     {
-        switch ($action)
-        {
-         case 'caslogin':
-            $login = true;
-            return false;
-         default:
-            return true;
+        switch ($action) {
+            case 'caslogin':
+                $login = true;
+                return false;
+            default:
+                return true;
         }
     }
 
-    function onInitializePlugin(){
+    public function onInitializePlugin()
+    {
         parent::onInitializePlugin();
-        if(!isset($this->server)){
+        if (!isset($this->server)) {
             // TRANS: Exception thrown when the CAS Authentication plugin has been configured incorrectly.
             throw new Exception(_m("Specifying a server is required."));
         }
-        if(!isset($this->port)){
+        if (!isset($this->port)) {
             // TRANS: Exception thrown when the CAS Authentication plugin has been configured incorrectly.
             throw new Exception(_m("Specifying a port is required."));
         }
-        if(!isset($this->path)){
+        if (!isset($this->path)) {
             // TRANS: Exception thrown when the CAS Authentication plugin has been configured incorrectly.
             throw new Exception(_m("Specifying a path is required."));
         }
diff --git a/plugins/Embed/EmbedPlugin.php b/plugins/Embed/EmbedPlugin.php
index afeb7a413f..e8f5578b30 100644
--- a/plugins/Embed/EmbedPlugin.php
+++ b/plugins/Embed/EmbedPlugin.php
@@ -373,7 +373,6 @@ class EmbedPlugin extends Plugin
         case 'link':
             if (!empty($embed->html)
                     && (GNUsocial::isAjax() || common_config('attachments', 'show_html'))) {
-                require_once INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php';
                 $purifier = new HTMLPurifier();
                 // FIXME: do we allow <object> and <embed> here? we did that when we used htmLawed,
                 // but I'm not sure anymore...
@@ -638,12 +637,16 @@ class EmbedPlugin extends Plugin
             try {
                 $imgData = HTTPClient::quickGet($url);
                 if (isset($imgData)) {
-                    list($filename, $width, $height) = $this->validateAndWriteImage($imgData, $url, $headers,
-                                                                                    $thumbnail->file_id);
+                    list($filename, $width, $height) = $this->validateAndWriteImage(
+                        $imgData,
+                        $url,
+                        $headers,
+                        $thumbnail->file_id
+                    );
                 } else {
                     throw new UnsupportedMediaException('HTTPClient returned an empty result');
                 }
-            } catch(UnsupportedMediaException $e) {
+            } catch (UnsupportedMediaException $e) {
                 // Couldn't find anything that looks like an image, nothing to do
                 common_debug("Embed was not able to find an image for URL `{$url}`: " . $e->getMessage());
                 return false;
diff --git a/plugins/Orbited/OrbitedPlugin.php b/plugins/Orbited/OrbitedPlugin.php
index 951a4d7737..d9c12ccc43 100644
--- a/plugins/Orbited/OrbitedPlugin.php
+++ b/plugins/Orbited/OrbitedPlugin.php
@@ -1,37 +1,32 @@
 <?php
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
- * Laconica, the distributed open-source microblogging tool
- *
  * Plugin to do "real time" updates using Orbited + STOMP
  *
- * PHP version 5
- *
- * LICENCE: This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
  * @category  Plugin
- * @package   Laconica
- * @author    Evan Prodromou <evan@controlyourself.ca>
- * @copyright 2009 Control Yourself, Inc.
- * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link      http://laconi.ca/
+ * @package   GNUsocial
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2009 StatusNet, Inc.
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 
-if (!defined('GNUSOCIAL') && !defined('STATUSNET')) {
-    exit(1);
-}
+defined('GNUSOCIAL') || die();
 
-require_once INSTALLDIR.'/plugins/Realtime/RealtimePlugin.php';
+require_once INSTALLDIR . '/plugins/Realtime/RealtimePlugin.php';
 
 /**
  * Plugin to do realtime updates using Orbited + STOMP
@@ -39,11 +34,10 @@ require_once INSTALLDIR.'/plugins/Realtime/RealtimePlugin.php';
  * This plugin pushes data to a STOMP server which is then served to the
  * browser by the Orbited server.
  *
- * @category Plugin
- * @package  Laconica
- * @author   Evan Prodromou <evan@controlyourself.ca>
- * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link     http://laconi.ca/
+ * @category  Plugin
+ * @package   GNUsocial
+ * @author    Evan Prodromou <evan@status.net>
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 class OrbitedPlugin extends RealtimePlugin
 {
@@ -61,13 +55,13 @@ class OrbitedPlugin extends RealtimePlugin
 
     protected $con      = null;
 
-    function onStartShowHeadElements($action)
+    public function onStartShowHeadElements($action)
     {
         // See http://orbited.org/wiki/Deployment#Cross-SubdomainDeployment
         $action->element('script', null, ' document.domain = document.domain; ');
     }
 
-    function _getScripts()
+    public function _getScripts()
     {
         $scripts = parent::_getScripts();
 
@@ -85,7 +79,7 @@ class OrbitedPlugin extends RealtimePlugin
         return $scripts;
     }
 
-    function _updateInitialize($timeline, $user_id)
+    public function _updateInitialize($timeline, $user_id)
     {
         $script = parent::_updateInitialize($timeline, $user_id);
 
@@ -96,10 +90,8 @@ class OrbitedPlugin extends RealtimePlugin
           "\"{$timeline}\", \"{$this->webuser}\", \"{$this->webpass}\");";
     }
 
-    function _connect()
+    public function _connect()
     {
-        require_once(INSTALLDIR.'/extlib/Stomp.php');
-
         $url = $this->_getStompUrl();
 
         $this->con = new Stomp($url);
@@ -113,21 +105,20 @@ class OrbitedPlugin extends RealtimePlugin
         }
     }
 
-    function _publish($channel, $message)
+    public function _publish($channel, $message)
     {
-        $result = $this->con->send($channel,
-                                   json_encode($message));
+        $result = $this->con->send($channel, json_encode($message));
 
         return $result;
         // @todo Parse and deal with result.
     }
 
-    function _disconnect()
+    public function _disconnect()
     {
         $this->con->disconnect();
     }
 
-    function _pathToChannel($path)
+    public function _pathToChannel($path)
     {
         if (!empty($this->channelbase)) {
             array_unshift($path, $this->channelbase);
@@ -135,19 +126,19 @@ class OrbitedPlugin extends RealtimePlugin
         return '/' . implode('/', $path);
     }
 
-    function _getStompServer()
+    public function _getStompServer()
     {
         return (!is_null($this->stompserver)) ? $this->stompserver :
         (!is_null($this->webserver)) ? $this->webserver :
         common_config('site', 'server');
     }
 
-    function _getStompPort()
+    public function _getStompPort()
     {
         return (!is_null($this->stompport)) ? $this->stompport : 61613;
     }
 
-    function _getStompUrl()
+    public function _getStompUrl()
     {
         $server = $this->_getStompServer();
         $port   = $this->_getStompPort();
diff --git a/plugins/Xmpp/XmppPlugin.php b/plugins/Xmpp/XmppPlugin.php
index 366c1c806c..80d53b8ab7 100644
--- a/plugins/Xmpp/XmppPlugin.php
+++ b/plugins/Xmpp/XmppPlugin.php
@@ -1,48 +1,39 @@
 <?php
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
- * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2009, StatusNet, Inc.
- *
  * Send and receive notices using the XMPP network
  *
- * PHP version 7
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
  * @category  IM
- * @package   StatusNet
+ * @package   GNUsocial
  * @author    Evan Prodromou <evan@status.net>
  * @copyright 2009 StatusNet, Inc.
- * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
- * @link      http://status.net/
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 
-if (!defined('STATUSNET')) {
-    // This check helps protect against security problems;
-    // your code file can't be executed directly from the web.
-    exit(1);
-}
+defined('GNUSOCIAL') || die();
 
 /**
  * Plugin for XMPP
  *
  * @category  Plugin
- * @package   StatusNet
+ * @package   GNUsocial
  * @author    Evan Prodromou <evan@status.net>
  * @copyright 2009 StatusNet, Inc.
- * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
- * @link      http://status.net/
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 class XmppPlugin extends ImPlugin
 {
@@ -59,13 +50,13 @@ class XmppPlugin extends ImPlugin
 
     public $transport = 'xmpp';
 
-    function getDisplayName()
+    public function getDisplayName()
     {
         // TRANS: Plugin display name.
         return _m('XMPP/Jabber');
     }
 
-    function daemonScreenname()
+    public function daemonScreenname()
     {
         $ret = $this->user . '@' . $this->server;
         if ($this->resource) {
@@ -75,7 +66,7 @@ class XmppPlugin extends ImPlugin
         }
     }
 
-    function validate($screenname)
+    public function validate($screenname)
     {
         return $this->validateBaseJid($screenname, common_config('email', 'check_domain'));
     }
@@ -156,7 +147,7 @@ class XmppPlugin extends ImPlugin
         $parts = explode("/", $jid, 2);
         if (count($parts) > 1) {
             $resource = $parts[1];
-            // if ($resource == '') then
+        // if ($resource == '') then
             // Warning: empty resource isn't legit.
             // But if we're normalizing, we may as well take it...
         } else {
@@ -167,7 +158,7 @@ class XmppPlugin extends ImPlugin
         if ((count($node) > 2) || (count($node) == 0)) {
             // TRANS: Exception thrown when using too many @ signs in a Jabber ID.
             throw new Exception(_m('Invalid JID: too many @s.'));
-        } else if (count($node) == 1) {
+        } elseif (count($node) == 1) {
             $domain = $node[0];
             $node = null;
         } else {
@@ -236,33 +227,14 @@ class XmppPlugin extends ImPlugin
         return false;
     }
 
-    /**
-     * Load related Plugins when needed
-     *
-     * @param string $cls Name of the class to be loaded
-     *
-     * @return boolean hook value; true means continue processing, false means stop.
-     */
-
-    function onAutoload($cls)
-    {
-        switch ($cls) {
-            case 'XMPPHP_XMPP':
-                require_once __DIR__ . '/extlib/XMPPHP/XMPP.php';
-                return false;
-        }
-
-        return parent::onAutoload($cls);
-    }
-
-    function onStartImDaemonIoManagers(&$classes)
+    public function onStartImDaemonIoManagers(&$classes)
     {
         parent::onStartImDaemonIoManagers($classes);
         $classes[] = new XmppManager($this); // handles pings/reconnects
         return true;
     }
 
-    function sendMessage($screenname, $body)
+    public function sendMessage($screenname, $body)
     {
         $this->queuedConnection()->message($screenname, $body, 'chat');
     }
@@ -274,7 +246,7 @@ class XmppPlugin extends ImPlugin
      * @return QueuedXMPP
      * @throws Exception if server settings are invalid.
      */
-    function queuedConnection()
+    public function queuedConnection()
     {
         if (!isset($this->server)) {
             // TRANS: Exception thrown when the plugin configuration is incorrect.
@@ -293,22 +265,20 @@ class XmppPlugin extends ImPlugin
             throw new Exception(_m('You must specify a password in the configuration.'));
         }
 
-        return new QueuedXMPP($this, $this->host ?
-            $this->host :
-            $this->server,
+        return new QueuedXMPP(
+            $this,
+            ($this->host ?: $this->server),
             $this->port,
             $this->user,
             $this->password,
             $this->resource,
             $this->server,
-            $this->debug ?
-                true : false,
-            $this->debug ?
-                \XMPPHP\Log::LEVEL_VERBOSE : null
+            ($this->debug ? true : false),
+            ($this->debug ? \XMPPHP\Log::LEVEL_VERBOSE : null)
         );
     }
 
-    function sendNotice($screenname, Notice $notice)
+    public function sendNotice($screenname, Notice $notice)
     {
         try {
             $msg = $this->formatNotice($notice);
@@ -351,12 +321,18 @@ class XmppPlugin extends ImPlugin
         // FIXME: Why do we replace \t with ''? is it just to make it pretty? shouldn't whitespace be handled well...?
         $xs->raw(str_replace("\t", "", $notice->getRendered()));
         $xs->text(" ");
-        $xs->element('a', array(
-            'href' => common_local_url('conversation',
-                    array('id' => $notice->conversation)) . '#notice-' . $notice->id),
+        $xs->element(
+            'a',
+            [
+                'href' => common_local_url(
+                    'conversation',
+                    ['id' => $notice->conversation]
+                ) . '#notice-' . $notice->id,
+            ],
             // TRANS: Link description to notice in conversation.
             // TRANS: %s is a notice ID.
-            sprintf(_m('[%u]'), $notice->id));
+            sprintf(_m('[%u]'), $notice->id)
+        );
         $xs->elementEnd('body');
         $xs->elementEnd('html');
 
@@ -365,7 +341,7 @@ class XmppPlugin extends ImPlugin
         return $html . ' ' . $entry;
     }
 
-    function receiveRawMessage($pl)
+    public function receiveRawMessage($pl)
     {
         $from = $this->normalize($pl['from']);
 
@@ -390,7 +366,7 @@ class XmppPlugin extends ImPlugin
      * @param string $jid JID to check
      * @return string an equivalent JID in normalized (lowercase) form
      */
-    function normalize($jid)
+    public function normalize($jid)
     {
         try {
             $parts = $this->splitJid($jid);
@@ -411,17 +387,15 @@ class XmppPlugin extends ImPlugin
      *
      * @return boolean hook return
      */
-    function onGetValidDaemons(&$daemons)
+    public function onGetValidDaemons(&$daemons)
     {
         if (isset($this->server) &&
             isset($this->port) &&
             isset($this->user) &&
             isset($this->password)) {
-
             array_push(
                 $daemons,
-                INSTALLDIR
-                . '/scripts/imdaemon.php'
+                INSTALLDIR . '/scripts/imdaemon.php'
             );
         }
 
@@ -478,4 +452,3 @@ class XmppPlugin extends ImPlugin
         }
     }
 }
-
diff --git a/plugins/Xmpp/lib/queuedxmpp.php b/plugins/Xmpp/lib/queuedxmpp.php
index d0b93e0310..f8e13d6fb0 100644
--- a/plugins/Xmpp/lib/queuedxmpp.php
+++ b/plugins/Xmpp/lib/queuedxmpp.php
@@ -1,37 +1,30 @@
 <?php
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
- * StatusNet, the distributed open-source microblogging tool
- *
  * Queue-mediated proxy class for outgoing XMPP messages.
  *
- * PHP version 7
- *
- * LICENCE: This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
  * @category  Network
- * @package   StatusNet
+ * @package   GNUsocial
  * @author    Brion Vibber <brion@status.net>
  * @copyright 2010 StatusNet, Inc.
- * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link      http://status.net/
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 
-if (!defined('STATUSNET') && !defined('LACONICA')) {
-    exit(1);
-}
-
-require_once dirname(__DIR__) . '/extlib/XMPPHP/XMPP.php';
+defined('GNUSOCIAL') || die();
 
 use XMPPHP\XMPP;
 
@@ -82,7 +75,7 @@ class QueuedXMPP extends XMPP
      * @param string $msg
      * @param null $timeout
      */
-    public function send($msg, $timeout = NULL)
+    public function send($msg, $timeout = null)
     {
         @$this->plugin->enqueueOutgoingRaw($msg);
     }
diff --git a/plugins/Xmpp/lib/sharingxmpp.php b/plugins/Xmpp/lib/sharingxmpp.php
index 1992320bc3..6eb62dceb5 100644
--- a/plugins/Xmpp/lib/sharingxmpp.php
+++ b/plugins/Xmpp/lib/sharingxmpp.php
@@ -1,46 +1,36 @@
 <?php
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
- * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2009, StatusNet, Inc.
+ * Send and receive notices using the XMPP network
  *
- * Send and receive notices using the Jabber network
- *
- * PHP version 7
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- * @category  Jabber
- * @package   StatusNet
+ * @category  XMPP
+ * @package   GNUsocial
  * @author    Evan Prodromou <evan@status.net>
  * @copyright 2009 StatusNet, Inc.
- * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
- * @link      http://status.net/
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
  */
 
-if (!defined('STATUSNET')) {
-    // This check helps protect against security problems;
-    // your code file can't be executed directly from the web.
-    exit(1);
-}
-
-require_once dirname(__DIR__) . '/extlib/XMPPHP/XMPP.php';
+defined('GNUSOCIAL') || die();
 
 use XMPPHP\XMPP;
 
 class SharingXMPP extends XMPP
 {
-    function getSocket()
+    public function getSocket()
     {
         return $this->socket;
     }