Custom field toevoegen aan Woocommerce backend

function kia_display_order_data_in_admin( $order ){  ?>
    <div class="order_data_column" style="width: 100%;">
        <h4><?php _e( 'Extra Details', 'woocommerce' ); ?></h4>
        <?php
            echo '<p><strong>' . __( 'BTW nummer' ) . ':</strong> ' . get_post_meta( $order->id, '_billing_yweu_vat', true ) . '</p>'; ?>
    </div>
<?php }
add_action( 'woocommerce_admin_order_data_after_order_details', 'kia_display_order_data_in_admin' );

#admin #backend #custom field #functions #woocommerce