Functions everywhere, files used as methods, directories used as classes. I guess if someone wanted to see what a REST API would look like in PHP4, that's the answer.
It's hard to sum up in a short comment 5+ decades of industry evolution in structured and object oriented programming, versus just throwing everything in global space and piecing logic together through files. I suppose if I said things like polymorphism, dependency injection, abstraction, composition, it wouldn't mean much to you. This is why I just said it uses an obsolete PHP4 age approach. Whoever doesn't mind that, I hope they enjoy this framework.