The extraction of the action logic to a layer of Controllers completes a huge modernization goal for our legacy application. We now have a full Model View Controller system in place: a domain layer for models, a presentation layer for views, and a controller layer that connects the two.
We should feel very satisfied about our modernization progress. The code that remains in each page script is a shadow of its original self. Most of the logic is wiring code that creates a Controller with its dependencies. The remaining logic is the same across all page scripts; it invokes the Controller and sends the returned Response object.
However, there is a major legacy artifact for us to deal with. To finish a full extraction and encapsulation of controller logic, we need to remove any remaining include calls embedded in our Controller classes.