Creates a pair of connected, indistinguishable socket streams

Beschreibung

stream_socket_pair ( int $domain , int $type , int $protocol ) : array

stream_socket_pair() creates a pair of connected, indistinguishable socket streams. This function is commonly used in IPC (Inter-Process Communication).

Parameter-Liste

domain: The protocol family to be used: STREAM_PF_INET, STREAM_PF_INET6 or STREAM_PF_UNIX
type: The type of communication to be used: STREAM_SOCK_DGRAM, STREAM_SOCK_RAW, STREAM_SOCK_RDM, STREAM_SOCK_SEQPACKET or STREAM_SOCK_STREAM
protocol: The protocol to be used: STREAM_IPPROTO_ICMP, STREAM_IPPROTO_IP, STREAM_IPPROTO_RAW, STREAM_IPPROTO_TCP or STREAM_IPPROTO_UDP

Hinweis: Please consult the Streams constant list for further details on each constant.

Rückgabewerte

Returns an array with the two socket resources on success, or FALSE on failure.

Changelog

Version	Beschreibung
5.3.0	This function is now available on Windows platforms.

Beispiele

Beispiel #1 A stream_socket_pair() example

This example shows the basic usage of stream_socket_pair() in Inter-Process Communication.


<?php

$sockets = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP);
$pid     = pcntl_fork();

if ($pid == -1) {
     die('could not fork');

} else if ($pid) {
     /* parent */
    fclose($sockets[0]);

    fwrite($sockets[1], "child PID: $pid\n");
    echo fgets($sockets[1]);

    fclose($sockets[1]);

} else {
    /* child */
    fclose($sockets[1]);

    fwrite($sockets[0], "message from child\n");
    echo fgets($sockets[0]);

    fclose($sockets[0]);
}

?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

child PID: 1378
message from child