socket_set_nonblock

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

socket_set_nonblock — Sets nonblocking mode for file descriptor fd

说明

socket_set_nonblock ( Socket $socket ) : bool

The socket_set_nonblock() function sets the O_NONBLOCK flag on the socket specified by the socket parameter.

When an operation (e.g. receive, send, connect, accept, ...) is performed on a non-blocking socket, the script will not pause its execution until it receives a signal or it can perform the operation. Rather, if the operation would result in a block, the called function will fail.

参数

socket

A Socket instance created with socket_create() or socket_accept().

返回值

成功时返回 true， 或者在失败时返回 false。

更新日志

版本 说明
8.0.0 socket is a Socket instance now; previously, it was a resource.

范例

示例 #1 socket_set_nonblock() example

<?php
$socket = socket_create_listen(1223);
socket_set_nonblock($socket);

socket_accept($socket);
?>

This example creates a listening socket on all interfaces on port 1223 and sets the socket to O_NONBLOCK mode. socket_accept() will immediately fail unless there is a pending connection exactly at this moment.

参见