/**
* Registers a function to be called on auth denied access
*
* This function will be called when a user, who is already logged in
* somehow, encounters a role beyond their access level.
* It might be used to offer the user to upgrade their level or present
* them with a denied screem.
*
* @param mixed $handler function or an array of class=>method
*
* @return null
*/
public static function registerDeniedHandler($handler)
{
if (is_callable($handler)) {
self::$_deniedHandler = $handler;
} else {
Nexista_Error::init('Auth Denied Handler Error', NX_ERROR_FATAL);
}
}
