$_val) { $$_key = smarty_function_escape_special_chars($_val); } $stock_left = oos_get_products_stock($products_id) - $products_quantity; $out_of_stock = ''; if ($stock_left < 0) { $out_of_stock = '' . STOCK_MARK_PRODUCT_OUT_OF_STOCK . ''; } return $out_of_stock; }