How to display the number of items in the cart OpenCart 2.3.0.2.1?

Question

PHP

Can you please tell me how to display the number of items in the cart OpenCart 2.3.0.2.1?
I need to output in header.tpl.
In the controller $data['count_product_cart'] = $this->cart->countProducts();
In header.tpl I call as $count_product_cart;
It doesn't work like that

Answer 1

Refresh mod cache

Answer 2

Look at https://nulled.in/threads/296492/
I got it on the 3rd opencart (look at the 2nd page of the article at the end added to update the values)