symfony/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php

<?php

namespace Symfony\Bundle\FrameworkBundle;

use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddSecurityVotersPass;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Bundle\Bundle;
use Symfony\Component\Form\FormConfiguration;

/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

/**
 * Bundle.
 *
 * @author Fabien Potencier <fabien.potencier@symfony-project.com>
 */
class FrameworkBundle extends Bundle
{
    /**
     * Boots the Bundle.
     */
    public function boot()
    {
        if ($this->container->has('error_handler')) {
            $this->container->get('error_handler');
        }
        if ($this->container->hasParameter('csrf_secret')) {
            FormConfiguration::setDefaultCsrfSecret($this->container->getParameter('csrf_secret'));
            FormConfiguration::enableDefaultCsrfProtection();
        }
    }

    public function registerExtensions(ContainerBuilder $container)
    {
        parent::registerExtensions($container);

        $container->addCompilerPass(new AddSecurityVotersPass());
    }
}