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stream_socket_pair
Podręcznik PHP
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stream_socket_pair

(PHP 5 >= 5.1.0RC1)

stream_socket_pair --  Creates a pair of connected, indistinguishable socket streams

Opis

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

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

Parametry

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

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

Zwracane wartości

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

Przykłady

Przykład 1. A stream_socket_pair() example

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

<?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]);
}

?>

Powyższy przykład wyświetli coś podobnego do:

child PID: 1378
message from child

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