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php实现websoc

2026-04-03 16:03:43PHP

PHP 实现 WebSocket

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

使用 `ratchet/pawl` 库

Ratchet 是一个 PHP WebSocket 库，可以轻松实现 WebSocket 服务器和客户端。

安装 Ratchet：

composer require ratchet/pawl

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 WebSocket 客户端：

use Ratchet\Client\Connector;
use React\EventLoop\Factory;

$loop = Factory::create();
$connector = new Connector($loop);

$connector('ws://localhost:8080')
    ->then(function(Ratchet\Client\WebSocket $conn) {
        $conn->on('message', function($msg) use ($conn) {
            echo "Received: {$msg}\n";
        });
        $conn->send('Hello Server!');
    }, function(\Exception $e) use ($loop) {
        echo "Could not connect: {$e->getMessage()}\n";
        $loop->stop();
    });

$loop->run();

使用 `swoole` 扩展

Swoole 是一个高性能 PHP 协程框架，内置 WebSocket 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, "Server: {$frame->data}");
});

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

$server->start();

使用原生 PHP 和 `socket` 扩展

虽然复杂，但可以通过 PHP 的 socket 扩展实现 WebSocket。

创建 WebSocket 握手和处理：

php实现websoc

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($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));
    }

    while (true) {
        $data = socket_read($client, 1024);
        if ($data === false) break;
        // 处理 WebSocket 数据帧
    }

    socket_close($client);
}