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php实现websoc

2026-02-28 06:56:17PHP

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，允许服务器和客户端之间实时交互。PHP 可以通过以下方式实现 WebSocket 功能。

使用 `Ratchet` 库

Ratchet 是一个流行的 PHP 库，用于实现 WebSocket 服务器。以下是实现步骤：

安装 Ratchet：

composer require cboden/ratchet

创建 WebSocket 服务器：

<?php
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();

创建自定义的 WebSocket 处理类：

<?php
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);
        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();
    }
}

启动服务器：

php server.php

使用 `Swoole` 扩展

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

安装 Swoole：

pecl install swoole

创建 WebSocket 服务器：

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

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

$server->start();

启动服务器：

php server.php

使用原生 PHP 实现

虽然不推荐，但可以通过原生 PHP 实现简单的 WebSocket 服务器。

创建服务器脚本：

<?php
$socket = stream_socket_server("tcp://0.0.0.0:8000", $errno, $errstr);

if (!$socket) {
    die("Failed to create socket: $errstr ($errno)\n");
}

while ($conn = stream_socket_accept($socket)) {
    $data = fread($conn, 1024);
    fwrite($conn, "HTTP/1.1 101 Switching Protocols\r\n");
    fwrite($conn, "Upgrade: websocket\r\n");
    fwrite($conn, "Connection: Upgrade\r\n");
    fwrite($conn, "Sec-WebSocket-Accept: " . base64_encode(sha1($data . "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true)) . "\r\n\r\n");

    while ($msg = fread($conn, 1024)) {
        echo "Received: $msg\n";
        fwrite($conn, "Server: $msg");
    }

    fclose($conn);
}

fclose($socket);

启动服务器：

php server.php

客户端连接

使用 JavaScript 连接 WebSocket 服务器：

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(`Message from server: ${event.data}`);
};

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

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