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php 实现ws

2026-02-14 22:04:25PHP

PHP 实现 WebSocket 服务

WebSocket 是一种全双工通信协议，允许客户端和服务器之间进行实时数据交换。PHP 可以通过以下方式实现 WebSocket 服务。

使用 Ratchet 库

Ratchet 是一个流行的 PHP WebSocket 库，基于 ReactPHP 实现。

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();

实现 Chat 类处理消息：

php 实现ws

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 PHP 的高性能网络通信引擎，内置 WebSocket 支持。

安装 Swoole：

pecl install swoole

创建 WebSocket 服务器：

php 实现ws

$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, $frame) {
    foreach ($server->connections as $fd) {
        if ($fd !== $frame->fd) {
            $server->push($fd, $frame->data);
        }
    }
});

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

$server->start();

原生 PHP 实现

PHP 也可以使用原生 socket 函数实现 WebSocket，但需要手动处理握手协议。

创建 socket 服务器：

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($socket, '0.0.0.0', 8080);
socket_listen($socket);

while (true) {
    $client = socket_accept($socket);
    $headers = socket_read($client, 1024);

    if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $headers, $match)) {
        $key = base64_encode(sha1($match[1] . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
        $response = "HTTP/1.1 101 Switching Protocols\r\n";
        $response .= "Upgrade: websocket\r\n";
        $response .= "Connection: Upgrade\r\n";
        $response .= "Sec-WebSocket-Accept: $key\r\n\r\n";
        socket_write($client, $response, strlen($response));
    }

    // 消息处理逻辑...
}

客户端连接示例

HTML/JavaScript 客户端连接代码：

<script>
const socket = new WebSocket('ws://localhost:8080');
socket.onopen = function(e) {
    console.log('Connection established');
};
socket.onmessage = function(event) {
    console.log('Data received: ' + event.data);
};
socket.onclose = function(event) {
    console.log('Connection closed');
};
</script>