Woocommerce - Add a product to cart programmatically via JS or PHP [closed]

Question

I am using the Woocommerce plugin to facilitate a small e-commerce part of a site and need to add products to its cart via some call or function rather than using its own 'add-to-cart' buttons.

By this I basically mean send Woocommerce a SKU and quantity for example and have the cart update.

sendToCart('123456', 55);

etc

I've looked through the documentation and can't seem to find a reference to this sort of thing. Can anyone suggest how I might achieve this?