Getting Shop ID

[wstar]

Having trouble getting the cart ID for the current user in a module I'm creating.  Currently, I'm getting the product being viewed by
 

$productID = (int)Tools::getValue('id_product');

However, Im trying the following code and not getting anything.  All variables are empty.

$context = Context::getContext();
$cartID = Context::getContext()->cart->id_cart;
$cartID2 = Tools::getValue('id_cart');
$cartID3 = $this->context->cart->id_cart;
$cartID4 = (int)$context->cookie->id_cart;
$shopID5 = Shop::getContextShopID();

 

Any suggestion?

Edited April 8, 2016 by wstar (see edit history)

[roja45]

$this->context->cart->id