YouTube_captions_search_engine/website/websocket.php

<?php

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;
use React\EventLoop\LoopInterface;
use React\EventLoop\Timer\Timer;

// 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;
    private $loop;

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

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

    public function onMessage(ConnectionInterface $from, $msg)
    {
        $from->send($msg);
        $this->loop->addTimer(Timer::MIN_INTERVAL * 10, function() use ($from) {
            sleep(5);
            $from->send('Proceeded!');
        });
    }

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

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

$loop = \React\EventLoop\Factory::create();

// Run the server application through the WebSocket protocol on port 4430
$app = new Ratchet\App('crawler.yt.lemnoslife.com', 4430, '127.0.0.1', $loop);
$app->route('/websocket', new MyChat($loop), array('*'));
$app->run();