Description:
------------
This code works fine on PHP 4 but fails on PHP 5.1.2. I know that I need to try it on the 5.1.6 version but I can't get my suse server to upgrade to it. On PHP 5.1.2 it reports "Fatal error: Cannot redeclare class". If the "extends CTest3" is removed from file test.inc there is no error.



Reproduce code:
---------------
File 1: test.php
<?
require "test2.inc";
require "test2.inc";
?>

File 2: test2.inc
<?

if (defined("CTEST2")) return;
define("CTEST2", 1);

require "test3.inc";

class CTest2 extends CTest3
{

function CTest2()
{
	print "Test2";
}

}

?>

File 3: ?test3.inc?
<?

if (defined("CTEST3")) return;
define("CTEST3", 1);


class CTest3
{

function CTest3()
{
	print "Test3";
}

}

?>


Expected result:
----------------
No error

Actual result:
--------------
Fatal error: Cannot redeclare class ctest2 in test2.inc on line 16