Add to Cart via URL link

Supported OpenCart Versions:
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1.5.x
2.x


What does it do:
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Adds the ability to add an item to cart by direct link (GET) rather than needing a form post (POST).
Also adds alternative methods of adding by product_id, sku, or model.
Supports options as well (See examples below)


Requirements:
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* You will need to have the latest vQmod engine installed (http://vQmod.com)


Main features:
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* Simple vQmod script plug and play. No files to edit or overwrite.
* Supports lookup by product_id, sku, or model
* Instantly adds to cart and redirect to cart page
* If product has required options that were not specified, it will redirect to the product page to allow proper choice
* Can be expanded to support ANY unique field (isbn, upc, location, etc)
* Passable Parameters:
- product_id
- model
- sku
- quantity
- option
- redirect (eg: checkout/checkout)

Examples of use:
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Product with no options (product_id):
http://www.mysite.com/index.php?route=checkout/cart/addlink&product_id=47
Product with qty of 2 (product_id):
http://www.mysite.com/index.php?route=checkout/cart/addlink&product_id=47&quantity=2
Product with 1 option (product_id):
http://www.mysite.com/index.php?route=checkout/cart/addlink&product_id=47&option[8]=22