private function add_cat_to_pro($item1, $item2, $type, $amount) { $add_to_list = new Offer(); $add_to_list->init($item1, $item2, $type, $amount, CAT_TO_PRO); if ($add_to_list->isvalid == 1) { $this->discount_list[] =& $add_to_list; } }