Symfony is a PHP web application.

It is for MVC applications.

Symfony is free software and released under the MIT(Massachusetts Institute of Technology) license .

The symfony-project.com website launched on October 18, 2005

Symfony aims to speed up the creation and maintenance of web applications and to replace repetitive coding tasks.

Symfony has a low performance overhead used with a bytecode cache.

Symfony provides PHP approach via two classes that allow you to interact with the HTTP request and response in an easier way.

The Request class is a simple object-oriented representation of the HTTP request message.

use Symfony\Component\HttpFoundation\Request;

$request = Request::createFromGlobals();

// the URI being requested (e.g. /about) minus any query parameters

$request->getPathInfo();

// retrieve GET and POST variables respectively

$request->query->get('name');

$request->request->get('bar', 'default value if bar does not exist');

// retrieve SERVER variables

$request->server->get('HTTP_HOST');

// retrieves an instance of UploadedFile identified by name

$request->files->get('name');

// retrieve a COOKIE value

$request->cookies->get('PHPSESSID');

// retrieve an HTTP request header, with normalized, lowercase keys

$request->headers->get('host');

$request->headers->get('content_type');

$request->getMethod(); // GET, POST, PUT, DELETE, HEAD

$request->getLanguages(); // an array of languages the client accepts