title: Adding multiple items to WooCommerce cart at once
body: <p>I have 3 IDs of the different items that I want to add to my shopping cart.
  I could use <code>https://url.com/shop/cart/?add-to-cart=3001</code> but when I want to add 3 items I can't do it. Is there any function/script I can add to add this ability to my shopping website?</p>
  
  <p>I tried to add an <code>&amp;</code> after the <code>add-to-cart</code> and tried to add a new value but GETs get overridden right?:
  <code>https://url.com/shop/cart/?add-to-cart=3001&amp;add-to-cart=2002&amp;add-to-cart=1001</code></p>