Where to look up design pattern of symfony ?

Question

The official website seems only provided some tutorial on how to use:

http://www.symfony-project.org

But I want to know why the directories should be setup like this

Answer 1

This guide details the reasoning behind the Symfony file structure: http://www.symfony-project.org/book/1_2/02-Exploring-Symfony-s-Code

Answer 2

Symfony is based on a lot of patterns, this blog post highlights a few of them: http://obvioushints.blogspot.com/2008/12/symfony-design-patterns.html

Basically, it's a model-view-controller (MVC) framework and the directories are setup like that only to organize the numerous configuration and PHP files that are created during a normal, structured project. Of course, you'd need to be a little bit more specific on what makes you curious about the directory structure but if you go through the documentation, you'll find interesting facts about how your project will be divided. The directory structure is not necessarily related to a specific design pattern itself (the code is) but probably more related to just getting your files organized.

Anyway, Symfony is a PHP framework like many others, and just by going through generic design patterns using classic books such as Patterns of Enterprise Application Architecture or websites about PHP patterns recipes, popular patterns or extensive lists, you should get a good idea on the general structure.