Parsing Includes to Single File

I've been searching around trying to find a util or script that will take a php script, parse all the include, include_once, require, and require_once statements, then create a new file with all the code joined together.

This:

<?php
include('foo.php');
include('bar.php');
echo "Hello World."
?>


To This:

<?php
echo "This is foo.php";
echo "This is bar.php";
echo "Hello World.";
?>


Any ideas?

Thanks.