1.FrontController.php

<?php

$kernel = new AppKernel('prod', false);
$kernel->loadClassCache();
$kernel = new AppCache($kernel);
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);

2.Decorator.php

<?php

class HttpCache implements HttpKernelInterface, TerminableInterface
{
    private $kernel;
    [...]

    public function __construct(HttpKernelInterface $kernel, [...])
    {
        $this->store = $store;
        $this->kernel = $kernel;

        [...]
    }

FactoryMethod.yml

services:
   my.gorgeous.repository:
        class:           My\Gorgeous\Repository\SuperPowerRepository
        factory_service: doctrine.orm.default_entity_manager
        factory_method:  getRepository
        arguments:
            - MyGorgeousBundle:SuperPower

Form.php

<?php

$task = new Task();
$task->setTask('Write a blog post');
$task->setDueDate(new \DateTime('tomorrow'));

$form = $this->createFormBuilder($task)
    ->add('task', 'text')
    ->add('dueDate', 'date')
    ->add('save', 'submit')
    ->getForm();

FormBuilder.php

<?php

interface FormBuilderInterface extends \Traversable, \Countable, FormConfigBuilderInterface
{
    public function add($child, $type = null, array $options = array());
    public function create($name, $type = null, array $options = array());
    public function get($name);
    public function remove($name);
    public function has($name);
    public function all();
    public function getForm();
}

FragmentRendererInterface.php

<?php

interface FragmentRendererInterface
{
    public function render($uri, Request $request, array $options = array());

    public function getName();
}

FragmentRenderers.php

<?php
abstract class RoutableFragmentRenderer implements FragmentRendererInterface
{
//[...]
}

class EsiFragmentRenderer extends RoutableFragmentRenderer
{
//[...]
{

class HIncludeFragmentRenderer extends RoutableFragmentRenderer
{
//[...]
}

HttpKernelInterface.php

<?php

interface HttpKernelInterface
{
    const MASTER_REQUEST = 1;
    const SUB_REQUEST = 2;
    /** Handles a Request to convert it to a Response. */
    public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true);
}

InitializeContainer.php

<?php

    protected function initializeContainer()
    {
        $class = $this->getContainerClass();
        //omitted caching stuff

        $this->container = new $class();
        $this->container->set('kernel', $this);

        if (!$fresh && $this->container->has('cache_warmer')) {
            $this->container->get('cache_warmer')->warmUp($this->container->getParameter('kernel.cache_dir'));
        }
    }

Mailer.php

<?php

class Mailer
{
    protected $transport;

    public function __construct(MyTransportInterface $transport)
    {
        $this->transport = $transport;
    }

    public function sendEmailMessage($body, $subject, $from, $to)
    {
        //do stuff

        $this->transport->send($body, $subject, $from, $to);
    }
}

MetadataInterface.php

<?php

namespace Symfony\Component\Validator;

interface MetadataInterface
{
    public function accept(ValidationVisitorInterface $visitor, $value, $group, $propertyPath);

    public function findConstraints($group);
}

NewsletterFactory.php

<?php

class NewsletterFactory
{
    public function get()
    {
        $newsletterManager = new NewsletterManager();

        // ...

        return $newsletterManager;
    }
}

NewsletterServices.yml

parameters:
    # ...
    newsletter_manager.class: NewsletterManager
    newsletter_factory.class: NewsletterFactory
services:
    newsletter_manager:
        class:          "%newsletter_manager.class%"
        factory_class:  "%newsletter_factory.class%"
        factory_method: get

ProxyManager.yml

#php composer.phar require symfony/proxy-manager-bridge:2.3.*

services:
   foo:
     class: Acme\Foo
     lazy: true

SecurityFactoryInterface.php

<?php

interface SecurityFactoryInterface
{
    public function create(ContainerBuilder $container, $id, $config, $userProvider, $defaultEntryPoint);

    public function getPosition();

    public function getKey();

    public function addConfiguration(NodeDefinition $builder);
}

ValidationVisitorInterface.php

<?php

namespace Symfony\Component\Validator;

interface ValidationVisitorInterface
{
    public function validate($value, $group, $propertyPath, $traverse = false, $deep = false);

    public function visit(MetadataInterface $metadata, $value, $group, $propertyPath);
}

<?php

interface HttpKernelInterface
{
    const MASTER_REQUEST = 1;
    const SUB_REQUEST = 2;
    /** Handles a Request to convert it to a Response. */
    public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true);
}

<?php

namespace MongoDBODMProxies\__CG__\Acme\CartBundle\Document;

use Doctrine\ODM\MongoDB\Persisters\DocumentPersister;

/**
 * THIS CLASS WAS GENERATED BY THE DOCTRINE ODM. DO NOT EDIT THIS FILE.
 */
class Cart extends \Acme\CartBundle\Document\Cart implements \Doctrine\ODM\MongoDB\Proxy\Proxy
{