'Admin_Login_']]; protected $_role = 'admin'; public static function getInstance() { if (null === self::$_instance) { self::$_instance = new self(); } return self::$_instance; } public function getSuMode() { return (bool) $this->getSessionValue('suModeEnabled'); } public function setSuMode($flag = true) { $this->setSessionValue('suModeEnabled', (bool) $flag); } }