Facebook's HipHop - What's it for?

Question

The news in the PHP world today is Facebook\'s HipHop, which:

HipHop for PHP isn\'t technically a compiler itself. Rather it is a source code transformer.

Answer 1

This article:

http://terrychay.com/article/hiphop-for-faster-php.shtml

answers this question perfectly with its series of "if" statements.