RealMag777 on "Shop for x more to get free shipping in WooCommerce 2.6.x"

Hi Folks!

I understood that using of hook 'woocommerce_shipping_free_shipping_is_available' is not available to get the index of shipping zone from WooCommerce 2.6.0 -> from fact this not possible to use this hook.

After some investigation I understood that this task can be resolved in another way using hook 'woocommerce_package_rates', below is the code which do the job:

add_filter('woocommerce_package_rates', function($rates) {
    if (version_compare(WOOCOMMERCE_VERSION, '2.6.0', '>='))
    {
        global $woocommerce;
        $free_shipping_index = -1;
        foreach ($rates as $rk => $rate)
        {
            if ($rate->method_id == 'free_shipping')
            {
                $free_shipping_id = explode(':', $rate->id);
                $free_shipping_id = (int) $free_shipping_id[1];
                $free_shipping_settings = get_option('woocommerce_free_shipping_' . $free_shipping_id . '_settings');
                $allows_array = array('min_amount', 'either', 'both');
                if (in_array($free_shipping_settings['requires'], $allows_array))
                {
                    $min_amount = $free_shipping_settings['min_amount'];
                    $amount = floatval(preg_replace('#[^d.]#', '', $woocommerce->cart->get_cart_total()));

                    if ($min_amount > $amount)
                    {
                        $free_shipping_index = $rk;
                    }

                    //***
                    $free_shipping_coupon = false;
                    if (!empty($woocommerce->cart->applied_coupons))
                    {
                        $coupon = new WC_Coupon($woocommerce->cart->applied_coupons[0]);
                        $free_shipping_coupon_val = get_post_meta($coupon->id, 'free_shipping', true);
                        if ($free_shipping_coupon_val == 'yes')
                        {
                            //in in coupom enabled 'Allow free shipping' checkbox
                            $free_shipping_coupon = true;
                        }
                    }

                    if ($free_shipping_settings['requires'] == 'both')
                    {
                        if ($free_shipping_coupon AND $amount >= $min_amount)
                        {
                            $free_shipping_index = -1;
                        } else
                        {
                            $free_shipping_index = $rk;
                        }
                    }

                    //***

                    if ($free_shipping_settings['requires'] == 'either')
                    {
                        if ($free_shipping_coupon)
                        {
                            $free_shipping_index = -1;
                        }
                    }
                }

                break;
            }
        }

        if ($free_shipping_index > -1)
        {
            unset($rates[$free_shipping_index]);
        }
    }

    return $rates;
}, 9999);