Adding simple products to cart through custom PHP code is pretty straight forward. You just need to call the ‘$cart->addProduct()’ function with the product_id and quantity as parameters. But if you want to add grouped products to cart through your code, you will need to perform few additional steps. The process is very easy – create an ‘$super_group’ array of the associated products with the specified quantities. Then you need to pass the array to the ‘addProduct()’ function. See the actual code below that makes it work:
<?php //Array for holding the associated products $super_group = array(); //Id of the grouped product $parentId = <grouped_product_id>;


