Description:
------------
Works with php5b3 but not php5b4.
With the require_once statement, it's impossible to go to a parent directory.
a fatal error occurs while the compilation.

Reproduce code:
---------------
file test1.php in directory test1/ :

<?php
require_once "../test2.php";
echo $hello;
?>

file test2.php in the parent directory :

<?php
	$hello="Hello World !";
?>

Expected result:
----------------
compilation ok and print "Hello World !"

Actual result:
--------------
A fatal error occurs while compilation because it is unable to locate test2.php