Description:
------------
I'm building a huge PHP5 script that is using classes.
However somehow by returning function data to a previous call thru another class the data is not returned but a NULL instead.

The below script has a similar layout as mine but as i said mine is huge, so if thisone works as expected i will figure out a way to provide my huge reproducable bug.

Reproduce code:
---------------
<?php

class A
{
    public function foo()
    {
        $foo = 'foo';
        return $foo;
    }
}
class B
{
    public function bar()
    {
        global $A;
        $bar = $A->foo();
        return $bar;
    }
}
class C
{
    public function test()
    {
        global $B;
        $test = $B->bar();
        echo gettype($test);
    }
}

$A = new A();
$B = new B();
C::test();

Expected result:
----------------
string

Actual result:
--------------
NULL