php-com-cen/bin/server.php

<?php

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

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

class TestServer implements MessageComponentInterface
{
    private array $connectedUsers = [];

    private function deleteGivenId(int $id): void
    {
        foreach ($this->connectedUsers as $key => $conn) {
            if ($conn->resourceId === $id) {
                unset($this->connectedUsers[$key]);
                return;
            }
        }
    }
    public function onOpen(ConnectionInterface $conn): void
    {
        $this->connectedUsers[] = $conn;
        $conn->send("Connected users: " . count($this->connectedUsers));
        echo "New connection: {$conn->resourceId}\n";
    }

    public function onMessage(ConnectionInterface $from, $msg): void
    {
        $from->send("Resending: $msg");
        foreach ($this->connectedUsers as $conn) {
            if ($from->resourceId !== $conn->resourceId) {
                $conn->send("From user " . $from->resourceId . ": " . $msg);
            }
        }
    }

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

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

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

echo "WebSocket server running on ws://localhost:8080\n";

$server->run();