public static function getJabbexInstance() { if (!self::$_jabbex_instance) { try { require_once "jabbex_api/Jabbex.php"; self::$_jabbex_instance = new Jabbex(session_hash()); } catch (Exception $e) { $GLOBALS['Response']->addFeedback('error', 'Jabbex require_once error:' . $e->getMessage()); return null; } } return self::$_jabbex_instance; }