Установите налоговый класс для товаров корзины на основе выбранного значения поля оформления заказа WooCommerce. ⇐ Php

[Anonymous]

In WooCommerce, I need to add a "billing_legal_person" custom field to my Checkout page that is selectable between "Person" and "Company" to reflect whether the customer should be taxed as a company or as a person. Then, the applicable VAT percentage should be different according to the content of that billing_legal_person selection.
I have successfully created 2 tax classes: the default (standard) one for persons and a new "companies" class for companies.
I can also successfully apply programmatically one tax class or the other with this code:

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add_filter( 'woocommerce_product_get_tax_class', 'my_set_taxrate_for_billing_legal_person', 10, 2 );
add_filter( 'woocommerce_product_variation_get_tax_class', 'my_set_taxrate_for_billing_legal_person', 10, 2 );

function my_set_taxrate_for_billing_legal_person( $tax_class, $product ) {
// Commenting the line below, standard tax class is applied
$tax_class = 'companies';

return $tax_class;
}

I used Checkout Field Editor plugin to easily create the

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billing_legal_person

select field (values 'person' or 'company´).
I also managed to force the recalculation of the taxes when changing the content of my

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billing_legal_person

custom field:

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add_filter( 'woocommerce_checkout_fields', 'my_checkout_fields_trigger_refresh', 9999 );

function my_checkout_fields_trigger_refresh( $fields ) {
$fields['billing']['billing_legal_person']['class'][] = 'update_totals_on_change';

return $fields;
}

My problem is that inside

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my_set_taxrate_for_billing_legal_person()

, I'm unable to access the content of the

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billing_legal_person

custom field selected by the user.
If I check

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WC()->checkout->get_checkout_fields['billing_legal_person']

, I always get an empty value.
If I check

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WC()->checkout->checkout->get_value('billing_first_name')

, I get the intended value (customer first name). However, if I then check

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WC()->checkout->checkout->get_value('billing_legal_person')

, I get a

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NULL

value. I suppose I can access

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billing_first_name

because it's a standard field but I can't access

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billing_legal_person

because it is a custom field, but I could not find any clue on how to access custom fields.
All approaches based on checking

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$_POST['billing_legal_person']

fail because I need to show the amount of taxes to be paid BEFORE the user submits the check-out form.
Any help on how I could access the content of the

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billing_legal_person

custom field from

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my_set_taxrate_for_billing_legal_person()

so I can check it and return one tax class or another?


Источник: https://stackoverflow.com/questions/776 ... cted-value