WooCommerce free shipping to members results in error - php

Question

I have this issue where I want for members to receive free delivery. I have figured out how to do that, but now I get an error on the page.
The error is:
The WC_Cart->taxes function is deprecated since version 3.2. Replace
with getters (WC_Cart::get_cart_contents_taxes()) and setters
(WC_Cart::set_cart_contents_taxes())., referer:
This is the code that generates the problem:
add_filter('woocommerce_package_rates','test_overwrite_fedex', 100, 2);
function test_overwrite_fedex($rates,$package)
{
$memberships = wc_memberships_get_user_active_memberships();
if (WC()->customer->get_shipping_country() === 'DK' && !empty($memberships))
{
foreach ($rates as $rate)
{
//Set the TAX
$rate->taxes[1] = 0;
}
}
return $rates;
}
I have tried with:
$rate->set_shipping_total('0');
WC()->cart->set_shipping_total('0');
$rate = WC()->cart->get_shipping_total();
And still no luck.

Answer 1

The Taxes for shipping methods rates are set in a more complex multidimensional array, so your code make an error. Also you just forgot to null the rate cost.
You may have to "Enable debug mode" in general shipping settings under "Shipping options" tab, to disable temporarily shipping caches.
Try the following code that will null any shipping method cost for a specific country (DK) and for active members:
add_filter('woocommerce_package_rates', 'conditionally_remove_shipping_rates_cost', 25, 2);
function conditionally_remove_shipping_rates_cost( $rates, $package ){
$memberships = wc_memberships_get_user_active_memberships();
if ( WC()->customer->get_shipping_country() === 'DK' && !empty($memberships) ) {
// Loop through the shipping taxes array
foreach ( $rates as $rate_key => $rate ){
$has_taxes = false;
// Not for free shipping
if( 'free_shippping' !== $rate->method_id ){
// Taxes rate cost (if enabled)
$taxes = [];
// Null the shippin cost
$rates[$rate_key]->cost = 0;
// Loop through the shipping taxes array (as they can be many)
foreach ($rates[$rate_key]->taxes as $key => $tax){
if( $rates[$rate_key]->taxes[$key] > 0 ){
// Null tax cost
$taxes[$key] = 0;
$has_taxes = true;
}
}
if( $has_taxes )
$rates[$rate_key]->taxes = $taxes;
}
}
}
return $rates;
}
Code goes in function.php file of your active child theme (or active theme). Tested and works (without the membership function).
Don't forget to enable back shipping cache.