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php怎么实现websocket

2026-02-15 21:48:15PHP

PHP 实现 WebSocket 的方法

WebSocket 是一种在单个 TCP 连接上进行全双工通信的协议。PHP 可以通过以下几种方式实现 WebSocket 功能。

使用 Ratchet 库

Ratchet 是一个流行的 PHP WebSocket 库，基于 ReactPHP 实现。以下是使用 Ratchet 实现 WebSocket 服务器的步骤：

安装 Ratchet：

composer require cboden/ratchet

创建 WebSocket 服务器：

use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use MyApp\Chat;

require dirname(__DIR__) . '/vendor/autoload.php';

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new Chat()
        )
    ),
    8080
);

$server->run();

创建 Chat 类处理消息：

namespace MyApp;

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class Chat implements MessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new \SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            if ($from !== $client) {
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        $conn->close();
    }
}

使用 Swoole 扩展

Swoole 是一个高性能的 PHP 协程框架，内置 WebSocket 服务器支持。

安装 Swoole：

pecl install swoole

创建 WebSocket 服务器：

$server = new Swoole\WebSocket\Server("0.0.0.0", 9501);

$server->on('open', function (Swoole\WebSocket\Server $server, $request) {
    echo "connection open: {$request->fd}\n";
});

$server->on('message', function (Swoole\WebSocket\Server $server, $frame) {
    echo "received message: {$frame->data}\n";
    $server->push($frame->fd, json_encode(["hello", "world"]));
});

$server->on('close', function ($server, $fd) {
    echo "connection close: {$fd}\n";
});

$server->start();

使用 Workerman

Workerman 是另一个 PHP 的 Socket 服务器框架，支持 WebSocket。

安装 Workerman：

composer require workerman/workerman

创建 WebSocket 服务器：

use Workerman\Worker;
use Workerman\Connection\TcpConnection;

require_once __DIR__ . '/vendor/autoload.php';

$ws_worker = new Worker("websocket://0.0.0.0:2346");

$ws_worker->onConnect = function($connection) {
    echo "New connection\n";
};

$ws_worker->onMessage = function($connection, $data) {
    $connection->send('Hello ' . $data);
};

$ws_worker->onClose = function($connection) {
    echo "Connection closed\n";
};

Worker::runAll();

客户端连接示例

HTML/JavaScript 客户端代码：

php怎么实现websocket

<script>
const socket = new WebSocket('ws://localhost:8080');

socket.onopen = function(e) {
    console.log('Connection established');
    socket.send('Hello Server!');
};

socket.onmessage = function(event) {
    console.log(`Data received from server: ${event.data}`);
};

socket.onclose = function(event) {
    console.log('Connection closed');
};

socket.onerror = function(error) {
    console.log(`Error: ${error.message}`);
};
</script>