Quote Originally Posted by HeleneWallis View Post
Yes, I know that, but I have never been able to make it work. The only way I've been able to manage the appropriate size shipping service for our products is to stay with the existing working code. I just need to know what variable to look at to see what Zencart thinks the product ID is here.
You'd just follow the "pattern" in that extras file, using (most likely)
Code:
$_SESSION['cart']->in_cart_check('master_categories_id', {product-id to be checked});