socket_set_nonblock
(PHP 4 >= 4.1.0, PHP 5, PHP 7)
socket_set_nonblock — Sets nonblocking mode for file descriptor fd
Description
$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.
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
- socket_set_block() - Sets blocking mode on a socket resource
- socket_set_option() - Sets socket options for the socket
- stream_set_blocking() - Set blocking/non-blocking mode on a stream
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
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References
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