title: Understanding Pimple
body: <p>I don't understand how is this "DI container" used. The examples shown on the official site tell me nothing: <a href="http://pimple.sensiolabs.org">http://pimple.sensiolabs.org</a></p>
  
  <p>Basically I have a simple site, that consists of a set of classes: the DB class, the Cache class, User class and a few more that handle content types.</p>
  
  <p>All these classes are like "services" mentioned in Pimple, and each service should be able to call another service. Right now I'm instantiating the services in a main class which I use it like a singleton to share services across other classes.</p>
  
  <p>From what I read, Pimple does exactly this sort of thing, but how do I use it? :s</p>