Site Root

[finnaz]

I've been following a tutorial from lynda.com (beyond the basics) - theres a page of code which defines your site root. But I cant seem to find the correct path - here is the code of initilize.php

<?php

// Define the core paths
// Define them as absolute paths to make sure that require_once works as expected

// DIRECTORY_SEPARATOR is a PHP pre-defined constant
// (\ for Windows, / for Unix)
defined('DS') ? null : define('DS', DIRECTORY_SEPARATOR);

defined('SITE_ROOT') ? null : 
define('SITE_ROOT', DS.'Users'.DS.'kevin'.DS.'Sites'.DS.'photo_gallery');
//define('SITE_ROOT', DS.'home'.DS.'sites'.DS.'mydomain.com'.DS.'public_html');  THIS IS WHAT I TRIED BUT IT DOESNT WORK
defined('LIB_PATH') ? null : define('LIB_PATH', SITE_ROOT.DS.'includes');

// load config file first
require_once(LIB_PATH.DS.'config.php');

// load basic functions next so that everything after can use them
require_once(LIB_PATH.DS.'functions.php');

// load core objects
require_once(LIB_PATH.DS.'session.php');
require_once(LIB_PATH.DS.'database.php');

// load database-related classes
require_once(LIB_PATH.DS.'user.php');

?>

 

My document root from phpinfo is /home/sites/mydomain.com/public_html/  - any help would be greatly appreciated.