For many years now, a common pattern, at least in PHP, is to organize your classes and files by archetype. But as a project grows (and grows, and grows) you may find that you’re jumping all over the place to work on a single feature. In fact, you may even find it hard to locate or figure out where all the related pieces of your feature are at. In this presentation, I’ll show you the way forward with a pattern called co-location. And we find that as we apply these principles, we actually learn to think differently about our software and how it’s put together. And that can tend to make us better software engineers, which is a goal we all share!