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php 实现websocket

2026-02-14 17:14:54PHP

PHP 实现 WebSocket

要在 PHP 中实现 WebSocket，可以使用 Ratchet 库，它是一个流行的 PHP WebSocket 库，基于 ReactPHP 构建。以下是实现 WebSocket 服务端和客户端通信的详细方法。

安装 Ratchet

使用 Composer 安装 Ratchet：

composer require cboden/ratchet

创建 WebSocket 服务器

创建一个 PHP 文件（如 server.php），编写 WebSocket 服务器逻辑：

<?php
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;
use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;

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

class MyWebSocket implements MessageComponentInterface {
    protected $clients;

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

    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
        echo "New connection: {$conn->resourceId}\n";
    }

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

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
        echo "Connection closed: {$conn->resourceId}\n";
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        echo "Error: {$e->getMessage()}\n";
        $conn->close();
    }
}

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

$server->run();

启动 WebSocket 服务器

在终端运行以下命令启动服务器：

php server.php

服务器将在 8080 端口监听 WebSocket 连接。

创建 WebSocket 客户端

使用 JavaScript 创建一个简单的 WebSocket 客户端：

<!DOCTYPE html>
<html>
<head>
    <title>WebSocket Client</title>
</head>
<body>
    <input type="text" id="message" placeholder="Enter message">
    <button onclick="sendMessage()">Send</button>
    <div id="output"></div>

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

        socket.onopen = function(e) {
            console.log('Connected to WebSocket server');
        };

        socket.onmessage = function(e) {
            document.getElementById('output').innerHTML += `<p>${e.data}</p>`;
        };

        socket.onclose = function(e) {
            console.log('Disconnected from WebSocket server');
        };

        function sendMessage() {
            const message = document.getElementById('message').value;
            socket.send(message);
        }
    </script>
</body>
</html>