服务端

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<?php // 服务端
error_reporting(E_ALL); // 报错级别

set_time_limit(0);      // 设置长链接
$address = "127.0.0.1"; // i p
$port = 10005;          // 端口

//创建一个套接字
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
    echo "创建一个套接字 失败\n";
}

//启动套接字
if (socket_bind($sock, $address, $port) === false) {
    echo "启动套接字 失败" . socket_strerror(socket_last_error($sock)) . "\n";
}

//监听端口
if (socket_listen($sock, 5) === false) {
    echo "监听端口 失败" . socket_strerror(socket_last_error($sock)) . "\n";
}

do { // 接收客户端传来的消息
	
    if (($msgsock = socket_accept($sock)) === false) {
        echo "socket_accepty() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
        break;
    }
    
    //echo "读取客户端传来的消息"."\n";
    $buf = socket_read($msgsock, 8192);
    
    $talkback = "我已经成功接到客户端的信息了。现在我还回信息给客户端" . "\n";
    if (false === socket_write($msgsock, $talkback)) {
        echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) . "\n";
    } else {
        echo "return info msg ku fu duan success" . "\n";
    }
    
    socket_close($msgsock);
    
} while (true);

socket_close($sock);
?>

客户端

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<?php // 客户端
require("./Socket.class.php");
$confing = array(
    'persistent' => false,
    'host' => 'localhost',
    'protocol' => 'tcp',
    'port' => 10005,
    'timeout' => 1800
);
$Socket  = new Socket($confing);
if ($Socket->connect()) {
    echo "TP类 创建Socket链接成功！<hr>";
} else {
    echo "TP类 创建Socket链接失败！<hr>";
}
$data = "我是客户端，我要发数据给服务端";
$Socket->write($data);
$read = $Socket->read();
//$read 是服务端还回的数据
echo $read . "<hr >";
$Socket->disconnect();
?>