Fascinating, learned something new about PHP. I can think of writing several ORM libraries that could take advantage of PHP's reflection class. Too bad though that most PHP coders do not take advantage of the languages diamonds in the rough so to speak such as __call(), __get(), array_map and the like.
do you have a link to that? I stumbled on some functional php stuff before but it didn't appear to be that active? I've been dabbling with my own stuff combining functional concepts with fluent expressions. It yields some surprisingly succinct solutions which look a lot like python list comprehensions actually.
We're currently trying to build some sort of community around it. The source code should be there. If not just let me know and I'll have it fix in jiff. Feel free to contribute to the library. I use the library extensively on our in house framework. So it should help you if the need arises.