WebSockets на PHP с Ratchet: чат и уведомления в реальном времени

WebSockets на PHP с Ratchet

WebSockets позволяют создавать двусторонние соединения между сервером и браузером без постоянных HTTP-запросов. Ratchet — популярная PHP-библиотека поверх ReactPHP для построения WebSocket-серверов.

Установка Ratchet

composer require cboden/ratchet

Простой WebSocket-сервер

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);
    }

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

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

Клиентский JavaScript

const ws = new WebSocket('wss://yourdomain.com/ws');

ws.onopen = () => console.log('Connected');
ws.onmessage = (e) => console.log('Message:', e.data);

// Отправка сообщения
ws.send(JSON.stringify({ user: 'Alice', text: 'Hello!' }));

Nginx Reverse Proxy для WebSockets

server {
    listen 443 ssl;
    server_name yourdomain.com;

    location /ws {
        proxy_pass http://127.0.0.1:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_read_timeout 86400;
    }
}

Автозапуск через systemd

[Unit]
Description=Ratchet WebSocket Server
After=network.target

[Service]
Type=simple
User=www-data
ExecStart=/usr/bin/php /var/www/html/ws-server.php
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target

systemctl enable ratchet-ws
systemctl start ratchet-ws
systemctl status ratchet-ws