PHP 中使用socket

一、开启socket

phpinfo();查看是否开启了socket扩展，否则在php.ini中开启。

二、服务器端代码的写法

<?php
error_reporting(E_ALL);
set_time_limit(0);
//ob_implicit_flush();

$address = '127.0.0.1';
$port = 10005;
//创建端口
if( ($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
	echo "socket_create() failed :reason:" . socket_strerror(socket_last_error()) . "\n";
}

//绑定
if (socket_bind($sock, $address, $port) === false) {
	echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
}

//监听
if (socket_listen($sock, 5) === false) {
	echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
}

do {
	//得到一个链接
	if (($msgsock = socket_accept($sock)) === false) {
		echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "\n";
		break;
	}
	//welcome  发送到客户端
	$msg = "<font color='red'>server send:welcome</font><br/>";
	socket_write($msgsock, $msg, strlen($msg));
	echo 'read client message\n';
	$buf = socket_read($msgsock, 8192);
	$talkback = "received message:$buf\n";
	echo $talkback;
	if (false === socket_write($msgsock, $talkback, strlen($talkback))) {
		echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) ."\n";
	} else {
		echo 'send success';
	}
	socket_close($msgsock);
} while(true);
//关闭socket
socket_close($sock);

?>

服务器端需要在cli模式是执行，有可能cli模式下php.ini文件载入的不一样

可以像如下输出

这时候在zhoxh目录下就有个tem.text文件。查看 Configuration File
(php.ini) Path => C:\WINDOWS 。不是我的php.ini
文件，这说明调用的php.ini文件时错误的。这时候我们要指定php.ini文件命令如下

注意的是我的php可以直接执行时配置了环境变量。

三、客户端

<?php
//error_reporting(E_ALL);
echo "<h2>tcp/ip connection </h2>\n";
$service_port = 10005;
$address = '127.0.0.1';

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
} else {
echo "OK. \n";
}

echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if($result === false) {
echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
} else {
echo "OK \n";
}
$in = "HEAD / http/1.1\r\n";
$in .= "HOST: localhost \r\n";
$in .= "Connection: close\r\n\r\n";
$out = "";
echo "sending http head request ...";
socket_write($socket, $in, strlen($in));
echo  "OK\n";

echo "Reading response:\n\n";
while ($out = socket_read($socket, 8192)) {
echo $out;
}
echo "closeing socket..";
socket_close($socket);
echo "ok .\n\n";

执行结果： 

server:

client: