If all you have is a room full of PHP developers and all you need is a REST site, then well you could do worse but I would like to discourage you from the practice.

Similarly, unless you have a highly specialized need - fun asynch chat server or complex app where business logic is being directly shared between client and server - I too would discourage locking one's self into that platform.

Javascript is not the worst thing ever, but why bother if you don't have to?