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socket_set_nonblock

PHP function Edit on GitHub ✎

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

Sets nonblocking mode for file descriptor fd

Description

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.

Parameters

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

Return Values

Success

Changelog

Version	Description

Examples

socket_set_nonblock() example

php

<?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.