_last_activity === null) $this->_last_activity = time(); return $this->_last_activity; } public function setLast_Activity($value) { $this->_last_activity = $value; } public static function finder($className=__CLASS__) { return parent::finder($className); } public function getUserList() { $this->deleteAll('last_activity < ?', time()-300); //5 min inactivity $content = '