Code-Snippets-Functions/Execute a function on a child site/WooCommerce/replace-zero-cost-to-free-from-shipping-method-full-label.txt

add_filter( 'woocommerce_cart_shipping_method_full_label', 'Add_free_to_shipping_label_for_zero_cost', 10, 2 );
function Add_free_to_shipping_label_for_zero_cost( $label, $method ) {
    // If shipping method cost is 0 or null, display 'Free' (except for free shipping method)
    if ( ! ( $method->cost > 0 ) && $method->method_id !== 'free_shipping' ) {
        $label .= ': ' . __('Free');
    }
    return $label;
}