php中socket的使用

一、开启socket

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

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

$address = '127.0.0.1';
$port = 10005;
//创建端口
//创建一个socket标识符，使用ipv4,可靠的tcp协议进行数据通信
//创建socket标识符失败

if( ($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
    echo "socket_create() failed :reason:" . socket_strerror(socket_last_error()) . "
";
}

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

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

do {
    //得到一个链接
    if (($msgsock = socket_accept($sock)) === false) {
        echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "
";
        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
';
    $buf = socket_read($msgsock, 8192);
    $talkback = "received message:$buf
";
    echo $talkback;
    if (false === socket_write($msgsock, $talkback, strlen($talkback))) {
        echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) ."
";
    } else {
        echo 'send success';
    }
    socket_close($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>
";
$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()) . "
";
} else {
    echo "OK. 
";
}

echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if($result === false) {
    echo "socket_connect() failed.
Reason: ($result) " . socket_strerror(socket_last_error($socket)) . "
";
} else {
    echo "OK 
";
}
$in = "HEAD / http/1.1
";
$in .= "HOST: localhost 
";
$in .= "Connection: close

";
$out = "";
echo "sending http head request ...";
socket_write($socket, $in, strlen($in));
echo  "OK
";

echo "Reading response:

";
while ($out = socket_read($socket, 8192)) {
    echo $out;
}
echo "closeing socket..";
socket_close($socket);
echo "ok .

";

执行结果： 

server:

client: