Wordpress 从标题图像获取所有缩略图url

我使用“get_Upload_header_images（）”函数获得了数组。现在我想在另一个数组中打印所有缩略图

我得到的数组是

          Array
(
    [cropped-abstract-white-awesome-album-black-colorful-cool-music-nice-1064669.jpg] => Array
        (
            [attachment_id] => 23
            [url] => http://localhost/TantraProjects/gradualis/wp-content/uploads/2014/02/cropped-abstract-white-awesome-album-black-colorful-cool-music-nice-1064669.jpg
            [thumbnail_url] => http://localhost/TantraProjects/gradualis/wp-content/uploads/2014/02/cropped-abstract-white-awesome-album-black-colorful-cool-music-nice-1064669.jpg
            [width] => 1300
            [height] => 400
        )

    [cropped-color.jpg] => Array
        (
            [attachment_id] => 24
            [url] => http://localhost/TantraProjects/gradualis/wp-content/uploads/2014/02/cropped-color.jpg
            [thumbnail_url] => http://localhost/TantraProjects/gradualis/wp-content/uploads/2014/02/cropped-color.jpg
            [width] => 1300
            [height] => 400
        )

)

---

现在我想要所有[缩略图url]的数组。

请再解释一下……我已经得到了答案。我通过普通的php foreach函数来使用它。谢谢你的关注。好的，没问题…享受编码。。。