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PHP socket_set_nonblock

PHP original manual for socket_set_nonblock [ show | php.net ]

socket_set_nonblock

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

socket_set_nonblock — Sets nonblocking mode for file descriptor fd

Description

bool socket_set_nonblock ( resource $socket )

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 valid socket resource created with socket_create() or socket_accept().

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #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.

See Also