Neither C nor PHP support functional programming well. They don't even acknowledge logic programming. But hey, you can use any style you want. As long as it's imperative.
I think the most multi-paradigm languages are certain lisps. As long as you only care about different declarative styles (basically the opposite of C), Haskell is surprisingly good: point-free programming is like stack-based programming and you can easily embed non-deterministic code as well. And you can write imperative code about as easily as writing functional code in PHP or C.
