Question

I have a regular class in my Symfony2 project:

    class RangeColumn extends Column{
        //...
    }

Now inside this class is a render function, in which I’d like to use Twig or the Translation Service of Symfony2 to render a specific template. How do I access this services in a proper way?

Answer 1

Use dependency injection. It’s a really simple concept.

You should simply pass (inject) needed services to your class.

If dependencies are obligatory pass them in a constructor. If they’re optional use setters.

You might go further and delegate construction of your class to the dependency injection container (make a service out of it).

Services are no different from your “regular” class. It’s just that their construction is delegated to the container.