Insert contact button when woocommerce product price is empty

In some clients’ WordPress and WooCommerce based ecommerces the need appeared to replace the normal “Add to cart” button with a “Contact” or “Get a quote” button instead, in order to link to the contact section.

To achive this, I tried some WordPress plugins, but their behaviour was not satisfying me because of the layouts or other facts, so in the end the easier and more customizable solution I found was to edit the functions.php file of the child theme to insert this action hook which inserts the button when the WooCommerce product price is empty.

function add_contact_link() {

  global $product;

  if ( $product->get_price() === '' ) :
    echo '<a href="/contact/" class="">Contact</a>';
  endif;
}
add_action( 'woocommerce_single_product_summary', 'add_contact_link', 100 );

This way we can add the classes or insert the html tags we need to have the control on the layout and behaviour we are searching for.

I hope you find this tip useful. Feel free to leave your feedback.