hello,
well i forgot, you can just put "MyClass" inside the root folder of your module, and you must include in your module controller like this
include_once('myclass.php');
or
require_once dirname(__FILE__).'myclass.php';
it depends which one works, and after that you can do something like this above your module controller class name
$myclass = new myclass();
now you can use every method in myclass like this
$this->makeMeRich();
i hope i got it right 😄