More details: http://2015.phpsummercamp.com/Programme/Loose-coupling-in-practice By Jakub Zalas Practices like DDD are becoming so popular in the PHP world that we tend to forget about the most basic forces in object oriented design - coupling and cohesion. This tutorial will remind you how important loose coupling is, what are the risks carried by tightly coupled software, and how to write loosely coupled code in the context of Symfony framework.