(PECL swoole >= 1.9.0)
$event_name
$callback
$host
$port
$socket_type
$process
$after_time_ms
$param
$fd
$uid
$timer_id
$reset
$reactor_id
$start_fd
$pagesize
$settings
$data
$ignore_error
$if_close_connection
$is_protected
$filename
$offset
$worker_id
$ip
$server_socket
$dst_worker_id
$timeout
$tasks
$timeout_ms
$interval_ms