If you want to make your web development simpler you only need to remember what the web is built on: http.
The people at Symfony are really focused on this throughout all their documentation, and I totally agree.
All the web runs on HTTP, and HTTP is a stateless protocol where you issue an http request to a web server and you get an http response from the web server.
The http protocol already defines some useful rules for specifying the address of what you are requesting: it’s called URI and just to name the most important things allows to define a path and some additional query parameters.
And finally, you already have some useful methods to define what do you mean to do with your request: GET, POST, PUT and DELETE (plus some other ones, less used).
Once you learn this, web development will open up for you in a thousand different ways without even considering the framework you’re working on. For more info you can get to the source of it all at http://www.w3.org/Protocols/rfc2616/rfc2616.html.
That’s why the Symfony framework is based on the very simple concepts of expecting an http request and giving an http response; you will see this repeated in every introductory piece about Symfony.
The aptly named HttpFoundation Symfony component contains a Request and a Response class that make half the job already.
A few consequences follows:
That’s it, you can start developing with Symfony and add other pieces along the way.