How to display discount in basket OpenCart 2.3?

Hi! The question how to display the variable $special in the basket below, provided that the product has a discount, the price is displayed as in the item card. In General, to a product in the cart was old and the new price.
Tried in the controller cart.php add the following:
'special' => $special,
But it's not working.
March 12th 20 at 08:08
1 answer
March 12th 20 at 08:10
'special' => $special

Well, it's understandable why it doesn't work.

Even with a basket it is not so simple. There is a price already, based on the selected options, discounts, etc. and considered it in the system/library/cart and not directly from the database is taken

Find more questions by tags OpenCart