DistributedClient::getInstance PHP Method

    public static function getInstance()
    {
        if (!self::$instance instanceof DistributedClient) {
            self::$instance = new DistributedClient();
        }
        return self::$instance;
    }

 public function onTimer($timer_id, $params = null)
 {
     $serverlist = DistributedClient::getInstance()->geterrlist(json_encode($this->b_server_pool));
     if ($serverlist) {
         unset($this->b_server_pool[ip2long($serverlist)]);
         $this->table->del(ip2long($serverlist));
     }
 }