Unconventional

A popular feature in Rails called "mixins" came to PHP a while back under the name "traits".  Traits let library developers give you a lot of functionality with little to no effort by injecting code into your classes that runs as if originally authored in them. Just toss a line of code into the class you want to augment and you're off to the races. The one snag I found when using traits however is that they don't participate in any kind of type system.  If desperate enough, you can use reflection to pull out whether a class has one applied or not, but that's only half the battle and a lot of work each time. This puts me in a slight bind when I'm interacting with classes using a trait I've made as I have no way to type check or hint them in. But then it dawned on me... interface MyInterface { public function thisMethodIsImportant(); } trait MyInterfaceImpl { public function thisMethodIsImportant() { return "Thanks