El archivo style.php que se encuentra en /theme/formal_white tiene este código:
<?PHP /* $Id: styles.php,v 1.17.14.1 2008/03/10 15:13:35 andreabix Exp $ */
/// Every theme should contain a copy of this script. It lets us
/// set up variables and so on before we include the raw CSS files.
/// The output of this script should be a completely standard CSS file.
/// THERE SHOULD BE NO NEED TO MODIFY THIS FILE!! USE CONFIG.PHP INSTEAD.
$lifetime = 600; // Seconds to cache this stylesheet
$nomoodlecookie = true; // Cookies prevent caching, so don't use them
require_once("../../config.php"); // Load up the Moodle libraries
$themename = basename(dirname(__FILE__)); // Name of the folder we are in
$forceconfig = optional_param('forceconfig', '', PARAM_FILE); // Get config from this theme
$lang = optional_param('lang', '', PARAM_FILE); // Look for styles in this language
style_sheet_setup(time(), $lifetime, $themename, $forceconfig, $lang);
?>