standalone grammar and parser for php

Question

i'm looking for a ready-made grammar and parser for php (at least 5.2), ideally an utility/library that can parse php code into a readable AST, e.g. xml. The parser itself doesn't have to be written in php, the source language doesn't matter much.

Answer 1

To answer my own question I've managed to compile phc on my OSX box, the parser part seems to work well

 phc --dump-xml=ast foo.php > bar.xml

creates an xml representation of the AST.