Code-Snippets-Functions/Execute a function on a child site/WooCommerce/remove-billing-email-on-profile-update.txt

add_action('profile_update', 'remove_billing_email_on_profile_update', 10, 2);

function remove_billing_email_on_profile_update($user_id, $old_user_data) {
    if (isset($_POST['billing_email']) && empty($_POST['billing_email'])) {
        delete_user_meta($user_id, 'billing_email');
    }
}