/**
  * Cleanup old sessions
  * @link http://php.net/manual/en/sessionhandlerinterface.gc.php
  * @param int $maxlifetime <p>
  * Sessions that have not updated for
  * the last maxlifetime seconds will be removed.
  * </p>
  * @return bool <p>
  * The return value (usually TRUE on success, FALSE on failure).
  * Note this value is returned internally to PHP for processing.
  * </p>
  * @since 5.4.0
  */
 public function gc($maxlifetime)
 {
     return $this->database->query(sprintf('TRUNCATE %s', $this->table)) ? true : false;
 }