Filters the required fields for the Billing Address section on the checkout page. Passes the array of field names.

apply_filters("pmpro_required_billing_fields", array $pmpro_required_billing_fields);

Parameters

$pmpro_required_billing_fields

array

Source

File: https://github.com/strangerstudios/paid-memberships-pro/blob/master/preheaders/checkout.php

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