YouTube_captions_search_engine/website/websocket.php

<?php

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

// Make sure composer dependencies have been installed
require __DIR__ . '/vendor/autoload.php';

/**
 * Send any incoming messages to all connected clients
 */
class MyChat implements MessageComponentInterface
{
    protected $clients;

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

    public function onOpen(ConnectionInterface $conn)
    {
        $this->clients->attach($conn);
    }

    public function onMessage(ConnectionInterface $from, $msg)
    {
        $from->send($msg);
    }

    public function onClose(ConnectionInterface $conn)
    {
        $this->clients->detach($conn);
    }

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

// Run the server application through the WebSocket protocol on port 4430
$app = new Ratchet\App('crawler.yt.lemnoslife.com', 4430);
$app->route('/websocket', new MyChat(), array('*'));
$app->run();