Symfony\Component\ClassLoader\ApcClassLoader::register PHP Method

    public function register($prepend = false)
    {
        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
    }

 /**
  * Builds internal request handling objects.
  *
  * @return $this
  */
 public function build()
 {
     if ($this->cache) {
         $loader = new ClassLoader();
         if ($this->apc) {
             $apcLoader = new ApcClassLoader(sha1('ReactServer'), $loader);
             $loader->unregister();
             $apcLoader->register(true);
         }
     }
     require_once $this->root_dir . '/AppKernel.php';
     define('KERNEL_ROOT', $this->root_dir);
     $kernel = new ReactKernel($this->env, $this->env === 'dev' ? true : false);
     $this->loop = Factory::create();
     // TODO make config for this part
     if (class_exists('\\Doctrine\\DBAL\\Driver\\PingableConnection')) {
         $this->loop->addPeriodicTimer(15, function () use($kernel) {
             foreach ($kernel->getContainer()->get('doctrine')->getConnections() as $connection) {
                 if ($connection instanceof \Doctrine\DBAL\Driver\PingableConnection) {
                     $connection->ping();
                 }
             }
         });
     }
     $this->socket = new SocketServer($this->loop);
     $http = new HttpServer($this->socket, $this->loop);
     $http->on('request', $this->handleRequest($kernel));
     return $this;
 }