PHP 8.1.15 Released!

socket_create_pair

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

socket_create_pair创建一对彼此连接的套接字,并用数组存储

说明

socket_create_pair(
    int $domain,
    int $type,
    int $protocol,
    array &$pair
): bool

socket_create_pair() 创建两个已连接的,彼此连接的套接字,并存储在 pair 中。此函数通常在 IPC(进程间通信)使用。

参数

domain

domain 参数指定套接字使用的协议族。完整列表参见 socket_create()

type

type 参数选择套接字使用的通信类型。完整列表参见 socket_create()

protocol

domain 参数指定套接字在 domain 协议族下通信时使用的具体协议。这个值可以通过 getprotobyname() 获取。如果所需的协议是 TCP 或 UDP,可以直接使用相应的常量 SOL_TCPSOL_UDP

有关支持协议的完整列表,参见 socket_create()

pair

包含两个 Socket 实例的引用数组。

返回值

成功时返回 true, 或者在失败时返回 false

更新日志

版本 说明
8.0.0 pair 现在是 Socket 实例的引用数组;在这之前是 resource 的引用数组。

范例

示例 #1 socket_create_pair() 示例

<?php
$sockets
= array();

/* On Windows we need to use AF_INET */
$domain = (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' ? AF_INET : AF_UNIX);

/* Setup socket pair */
if (socket_create_pair($domain, SOCK_STREAM, 0, $sockets) === false) {
echo
"socket_create_pair failed. Reason: ".socket_strerror(socket_last_error());
}
/* Send and Receive Data */
if (socket_write($sockets[0], "ABCdef123\n", strlen("ABCdef123\n")) === false) {
echo
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($sockets[0]));
}
if ((
$data = socket_read($sockets[1], strlen("ABCdef123\n"), PHP_BINARY_READ)) === false) {
echo
"socket_read() failed. Reason: ".socket_strerror(socket_last_error($sockets[1]));
}
var_dump($data);

/* Close sockets */
socket_close($sockets[0]);
socket_close($sockets[1]);
?>

示例 #2 socket_create_pair() IPC 示例

<?php
$ary
= array();
$strone = 'Message From Parent.';
$strtwo = 'Message From Child.';

if (
socket_create_pair(AF_UNIX, SOCK_STREAM, 0, $ary) === false) {
echo
"socket_create_pair() failed. Reason: ".socket_strerror(socket_last_error());
}
$pid = pcntl_fork();
if (
$pid == -1) {
echo
'Could not fork Process.';
} elseif (
$pid) {
/*parent*/
socket_close($ary[0]);
if (
socket_write($ary[1], $strone, strlen($strone)) === false) {
echo
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($ary[1]));
}
if (
socket_read($ary[1], strlen($strtwo), PHP_BINARY_READ) == $strtwo) {
echo
"Received $strtwo\n";
}
socket_close($ary[1]);
} else {
/*child*/
socket_close($ary[1]);
if (
socket_write($ary[0], $strtwo, strlen($strtwo)) === false) {
echo
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($ary[0]));
}
if (
socket_read($ary[0], strlen($strone), PHP_BINARY_READ) == $strone) {
echo
"Received $strone\n";
}
socket_close($ary[0]);
}
?>

参见

add a note

User Contributed Notes 2 notes

up
3
cweiske at php dot net
13 years ago
The underlying sockpair() function does only support AF_UNIX at least on BSD and Linux.
up
-6
thegreatall at gmail dot com
15 years ago
There is a syntax error in one of the code samples provided, it should look like this:
<?php
$sockets
= array();
/* Setup socket pair */
if (socket_create_pair(AF_UNIX, SOCK_STREAM, 0, $sockets) === false) {
    echo
"socket_create_pair failed. Reason: ".socket_strerror(socket_last_error());
}
/* Send and Recieve Data */
if (socket_write($sockets[0], "ABCdef123\n", strlen("ABCdef123\n")) === false) {
    echo
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($sockets[0]));
}
if ((
$data = socket_read($sockets[1], strlen("ABCdef123\n"), PHP_BINARY_READ)) === false) {
    echo
"socket_read() failed. Reason: ".socket_strerror(socket_last_error($sockets[1]));
}
var_dump($data);

/* Close sockets */
socket_close($sockets[0]);
socket_close($sockets[1]);
?>
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