WooCommerce获得属性的价值

Question

如何在WooCommerce订单中获取特定属性的值？

我尝试了以下代码，但我只获取了属性名称。如何获取属性的值？

$items = $order->get_items();
foreach ( $items as $item )
{
    $product_id = $item['product_id'];
    $product_variation_id = $item['variation_id'];
    $variation_data = get_post_meta( $product_variation_id );
    foreach ( $variation_data as $name => $value ) {
        if ( ! $value )
        {
            continue;
        }
        if ( taxonomy_exists( esc_attr( str_replace( 'attribute_', '', $name ) ) ) )
        {
            $attribute = $variation_data[$name][0];
            $value_of_attribute = ???;
        }           
    }
}