WooCommerce - add product and show checkout

woocommerce-add-to-cart-direct-checkout.php

<?
/*

Wordpress + WooCommerce
Add product directly to cart and take user to Checkout page
Instructions: 
  - add all php code within comment block below to active Wordpress theme file: functions.php
  - use URL structure: http://your-site.com/?add-to-cart=37  WHERE 37 is the ID of your WooCommerce Product

*/

/* 
add everything within this comment to your Wordpress theme functions.php
*/

add_filter ('woocommerce_add_to_cart_redirect', 'woo_redirect_to_checkout');
function woo_redirect_to_checkout() {
	$checkout_url = WC()->cart->get_checkout_url();
	return $checkout_url;
}

/*
END - direct checkout of product in cart
*/

/*
original source: http://www.remicorson.com/woocommerce-skip-product-cart-pages/
THANKS!
*/


?>