Customize Tax amount in “woocommerce_package_rates” hook

Question

I recently tried to modify all my shipping rates with hook to apply discount.

Here\'s my code :

add_filter( \'woocommerce_package_rates\', \'woocommerce         


        

Answer 1

Below code @LoicTheAztec without mistakes:

add_filter( 'woocommerce_package_rates', 'conditional_shipping_discount', 10, 2 );
    function conditional_shipping_discount( $rates, $packages ) {

    $user_id = get_current_user_id();
    if ( ! wc_memberships_is_user_active_member( $user_id, 'silver' ) ) return $rates;

    $percent = 30; // 30%
    $discount = 1 - ($percent / 100);

    foreach($rates as $rate_key => $rate_values ) {
        // Get original cost
        $original_cost = $rates[$rate_key]->cost;
        // Calculate the discounted rate cost
        $new_cost = $original_cost * $discount;
        // Set the discounted rate cost
        $rates[$rate_key]->cost = number_format($new_cost, 2);
        // calculate the conversion rate (for taxes)
        $conversion_rate = $new_cost / $original_cost;

        // Taxes rate cost (if enabled)
        $taxes = array();
        foreach ($rates[$rate_key]->taxes as $key => $tax){
            if( $tax > 0 ){ // set the new tax cost
                // set the new line tax cost in the taxes array
                $taxes[$key] = number_format( $tax * $conversion_rate, 2 );
            }
        }
        // Set the new taxes costs
        $rates[$rate_key]->taxes = $taxes;
    }
    return $rates;
}