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[READ-ONLY] Subtree split of the Symfony HttpKernel Component -- clone into Symfony/Component/ (master at symfony/symfony)

Merge branch '2.8'

* 2.8:
  fixes CS
  fixed CS
  [DependencyInjection] Add missing file headers
  fixed typo
  made Symfony compatible with both Twig 1.x and 2.x
  [FrameworkBundle] Fix precedence of xdebug.file_link_format
latest commit 047c0c5052
@fabpot fabpot authored
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Bundle Merge branch '2.3' into 2.6
CacheClearer [2.3] CS And DocBlock Fixes
CacheWarmer Merge branch '2.3' into 2.5
Config Make the container considered non-fresh if the environment parameters…
Controller fixes CS
DataCollector Merge branch '2.8'
Debug [3.0][HttpKernel] remove deprecated functions and classes
DependencyInjection [3.0][HttpKernel] remove deprecated functions and classes
Event Merge branch '2.3' into 2.6
EventListener Merge branch '2.8'
Exception [Debug] Removed deprecated interfaces
Fragment [3.0][HttpKernel] remove deprecated functions and classes
HttpCache Merge branch '2.8'
Log [3.0][HttpKernel] remove deprecated functions and classes
Profiler Merge branch '2.6' into 2.7
Tests Merge branch '2.8'
.gitignore Fix gitignore [3.0][HttpKernel] remove deprecated functions and classes
Client.php [2.6] Static Code Analysis for Components
HttpKernel.php Revert "[HttpKernel] Throw a LogicException when kernel.exception doe…
HttpKernelInterface.php Docblock fixes
Kernel.php Merge branch '2.8'
KernelEvents.php Merge branch '2.3' into 2.5
KernelInterface.php Merge branch '2.7'
LICENSE Updated copyright to 2015 renamed composer.phar to composer to be consistent with the Symfony docs
TerminableInterface.php fixed CS
UriSigner.php Merge branch '2.3' into 2.6
composer.json Merge branch '2.8'
phpunit.xml.dist [PhpUnitBridge] new bridge for testing with PHPUnit

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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