Woocommerce products per page fix

if  (isset($_POST['woocommerce-sort-by-columns']) && (($_COOKIE['shop_pageResults'] <> $_POST['woocommerce-sort-by-columns']))) {
        $numberOfProductsPerPage = $_POST['woocommerce-sort-by-columns'];
      } else {
    $numberOfProductsPerPage = $_COOKIE['shop_pageResults'];
      }
echo $numberOfProductsPerPage;