Description:
------------
I have the following structure:
common/a.php
parent/b.php
parent/child/c.php

Now, in c.php, I included the file b.php from the "parent" folder using relative path. b.php includes a.php from "common" folder using also relative path.

When I call c.php, it fails to include common/a.php within parent/b.php
However, when I call b.php it includes common/a.php with no problem.

And just to be clear, I have code in b.php (the actual one) that I need to keep separate from both a.php and c.php..

I have two physically different servers:
Development:
- Windows XP SP3
- Zend Server Community Edition 5.0.2 (Running PHP 5.3.2)

Production:
- Windows 2000 Small Business Server
- Apache 2.2
- PHP 5.3.5 (As Apache module)

Test script:
---------------
[a.php]
<?php
echo 'I am in!';


[b.php]
<?php
require_once '../common/a.php';


[c.php]
<?php
require_once '../b.php';

Expected result:
----------------
When c.php is executed, the inclusion of common/a.php and the output of:
"I am in!"

Actual result:
--------------
Production Server:
Warning: require_once(../common/a.php): failed to open stream: No such file or directory in D:\Program Files\Apache Software Foundation\Apache2.2\htdocs\test\parent\b.php on line 3 Fatal error: require_once(): Failed opening required '../common/a.php' (include_path='.;C:\php\pear') in D:\Program Files\Apache Software Foundation\Apache2.2\htdocs\test\parent\b.php on line 3 

Development Server:
Warning: require_once(../common/a.php) [function.require-once]: failed to open stream: No such file or directory in C:\Program Files\Zend\Apache2\htdocs\test\parent\b.php on line 2

Fatal error: require_once() [function.require]: Failed opening required '../common/a.php' (include_path='.;C:\Program Files\Zend\ZendServer\share\ZendFramework\library') in C:\Program Files\Zend\Apache2\htdocs\test\parent\b.php on line 2