(PECL swoole >= 1.9.0)
$after_time_ms
, callable $callback
, string $param
= ?
) : ReturnType$timer_id
) : void$ip
, int $port
, string $data
, string $server_socket
= ?
) : bool$data
, int $dst_worker_id
= ?
, callable $callback
= ?
) : mixed