PHP Conference Nagoya 2025

stream_socket_pair

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

stream_socket_pair Creates a pair of connected, indistinguishable socket streams

Опис

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

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

Параметри

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

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

Значення, що повертаються

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

Приклади

Приклад #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]);
}

?>

Поданий вище приклад виведе щось схоже на:

child PID: 1378
message from child

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