Context::sessionEncode PHP 메소드

    public static function sessionEncode($session_data = '')
    {
        if ($session_data !== '') {
            return serialize($session_data);
        }
        return '';
    }

 /**
  * 更新session
  * @param int $client_id
  * @param array $session
  */
 public static function updateSession($client_id, array $session)
 {
     self::updateSocketSession($client_id, Context::sessionEncode($session));
 }