WooCommerce - Link shop straight to cart

<?php
  // WooCommerce - make shop and catalogue images link straight to cart
  // code goes in functions.php for your child theme
  remove_action( 'woocommerce_before_shop_loop_item', 'woocommerce_template_loop_product_link_open', 10 );
  add_action( 'woocommerce_before_shop_loop_item', 'my_loop_open', 10);
  function my_loop_open() {
    $cart_link = 'http://www.topcode.co.uk/solar_active/shop/cart/?add-to-cart='.get_the_ID();
    echo '<a href="' . $cart_link . '" class="woocommerce-LoopProduct-link">';
  }