Eigene Checkout-Felder hinzufügen

add_filter('woocommerce_checkout_fields', 'custom_checkout_fields');
function custom_checkout_fields($fields) {
    $fields['billing']['billing_phone']['required'] = true;
    $fields['shipping']['shipping_company'] = array(
        'label' => 'Firmenname',
        'required' => false,
        'class' => array('form-row-wide')
    );
    return $fields;
}