socket_server.php

<?php

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

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

class WebSocketServer implements MessageComponentInterface {
    public function onOpen(ConnectionInterface $conn) {
        echo "New connection! ({$conn->resourceId})\n";
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        echo "Message received: {$msg}\n";
        $from->send("Server response: {$msg}");
    }

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

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

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

echo "WebSocket server running at ws://127.0.0.1:8080\n";
$server->run();