require_once :failed to open stream: no such file or directory

I have this testing code in "PAGE A":

<?php
require_once('../mysite/php/classes/eventManager.php');
$x=new EventManager();
$y=$x->loadNumbers();
?>

"eventManager.php" has inside a require_once:

<?php
require_once('../includes/dbconn.inc');
class EventManager {...}
?>

My folders structure is this:

mysite/php/classes folder and includes folder

If i test PAGE A in a browser i receive:

Warning: require_once(../includes/dbconn.inc) [function.require-once]: failed to open stream: No such file or directory in C:\wamp\www\mysite\php\classes\eventManager.php on line 3

---

Fatal error: require_once() [function.require]: Failed opening required '../includes/dbconn.inc' (include_path='.;C:\php5\pear') in C:\wamp\www\mysite\php\classes\eventManager.php on line 3

where is the error?

Thanks Luca

The error pretty much explains what the problem is: you are trying to include a file that is not there.

Try to use the full path to the file, using realpath(), and use dirname(__FILE__) to get your current directory:

require_once(realpath(dirname(__FILE__) . '/../includes/dbconn.inc'));

You will need to link to the file relative to the file that includes eventManager.php (Page A)

Change your code from
require_once('../includes/dbconn.inc');

To
require_once('../mysite/php/includes/dbconn.inc');