There's a reason the combination of type checking, proper containers and generics, inline XML, and asynchronous processing is all called Hack, and the runtime i

There's a reason the combination of type checking, proper containers and generics, inline XML, and asynchronous processing is all called Hack, and the runtime is called HHVM. At this point, new code using all these features only vaguely resembles PHP, but it's far more robust and maintainable, and vastly more performant.