The underlying sockpair() function does only support AF_UNIX at least on BSD and Linux.
(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
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。
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_TCP
和 SOL_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。
成功时返回 true
, 或者在失败时返回 false
。
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]);
}
?>
The underlying sockpair() function does only support AF_UNIX at least on BSD and Linux.
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]);
?>