-require_once("include/datetime.php");
-require_once('include/bbcode.php');
-require_once('include/ForumManager.php');
-require_once('include/group.php');
-require_once('mod/proxy.php');
-require_once('include/xml.php');
-require_once('include/cache.php');
+/**
+ * @file include/ping.php
+ */
+use Friendica\App;
+use Friendica\Content\ForumManager;
+use Friendica\Core\Cache;
+use Friendica\Core\System;
+use Friendica\Core\PConfig;
+use Friendica\Database\DBM;
+use Friendica\Object\Contact;
+use Friendica\Util\XML;
+
+require_once 'include/datetime.php';
+require_once 'include/bbcode.php';
+require_once 'include/group.php';
+require_once 'mod/proxy.php';
+require_once 'include/enotify.php';