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[READ-ONLY] Subtree split of the Symfony HttpKernel Component -- clone into Symfony/Component/ (master at symfony/symfony)
Latest commit 97e5aa9 @fabpot fabpot Merge branch '2.8'
* 2.8:
  [HttpKernel] clearstatcache() so the Cache sees when a .lck file has been released
  [WIP] [Form] [TwigBridge] Bootstrap horizontal theme missing tests
  [Serializer] Improve ObjectNormalizer performance
  AssetBundle - fix docs
  [Yaml] more fixes to changelog and upgrade files
  CS: remove impossible default argument value
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Bundle Remove deprecated ContainerAware class and make use of the trait in a…
CacheClearer [2.3] CS And DocBlock Fixes
CacheWarmer Merge branch '2.3' into 2.5
Config [3.0][Config] Remove ResourceInterface::getResource() which was depre…
Controller Add more callable type hints
DataCollector Merge branch '2.8'
Debug [3.0][HttpKernel] remove deprecated functions and classes
DependencyInjection [HttpKernel] make RequestStack parameter required for classes that ne…
Event Merge branch '2.8'
EventListener Add more callable type hints
Exception [Debug] Removed deprecated interfaces
Fragment [HttpKernel] make RequestStack parameter required for classes that ne…
HttpCache Merge branch '2.8'
Log [3.0][HttpKernel] remove deprecated functions and classes
Profiler Merge branch '2.8'
Tests Merge branch '2.8'
.gitignore Fix gitignore [HttpKernel] removed Profiler::import/export
Client.php Merge branch '2.3' into 2.7
HttpKernel.php Merge branch '2.3' into 2.7
HttpKernelInterface.php remove api tags from code
Kernel.php Merge branch '2.8'
KernelEvents.php Merge branch '2.3' into 2.7
KernelInterface.php Merge branch '2.8'
LICENSE Updated copyright to 2015 renamed composer.phar to composer to be consistent with the Symfony docs
TerminableInterface.php remove api tags from code
UriSigner.php Merge branch '2.3' into 2.6
composer.json Merge branch '2.8'
phpunit.xml.dist Add missing exclusions from phpunit.xml.dist

HttpKernel Component

HttpKernel provides the building blocks to create flexible and fast HTTP-based frameworks.

HttpKernelInterface is the core interface of the Symfony full-stack framework:

interface HttpKernelInterface
     * Handles a Request to convert it to a Response.
     * @param Request $request A Request instance
     * @return Response A Response instance
    function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true);

It takes a Request as an input and should return a Response as an output. Using this interface makes your code compatible with all frameworks using the Symfony components. And this will give you many cool features for free.

Creating a framework based on the Symfony components is really easy. Here is a very simple, but fully-featured framework based on the Symfony components:

$routes = new RouteCollection();
$routes->add('hello', new Route('/hello', array('_controller' =>
    function (Request $request) {
        return new Response(sprintf("Hello %s", $request->get('name')));

$request = Request::createFromGlobals();

$context = new RequestContext();

$matcher = new UrlMatcher($routes, $context);

$dispatcher = new EventDispatcher();
$dispatcher->addSubscriber(new RouterListener($matcher));

$resolver = new ControllerResolver();

$kernel = new HttpKernel($dispatcher, $resolver);


This is all you need to create a flexible framework with the Symfony components.

Want to add an HTTP reverse proxy and benefit from HTTP caching and Edge Side Includes?

$kernel = new HttpKernel($dispatcher, $resolver);

$kernel = new HttpCache($kernel, new Store(__DIR__.'/cache'));

Want to functional test this small framework?

$client = new Client($kernel);
$crawler = $client->request('GET', '/hello/Fabien');

$this->assertEquals('Fabien', $crawler->filter('p > span')->text());

Want nice error pages instead of ugly PHP exceptions?

$dispatcher->addSubscriber(new ExceptionListener(function (Request $request) {
    $msg = 'Something went wrong! ('.$request->get('exception')->getMessage().')';

    return new Response($msg, 500);

And that's why the simple looking HttpKernelInterface is so powerful. It gives you access to a lot of cool features, ready to be used out of the box, with no efforts.


You can run the unit tests with the following command:

$ cd path/to/Symfony/Component/HttpKernel/
$ composer install
$ phpunit
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