您可以使用get_posts 或创建新的WP_Query 使用以下参数（或类似的参数）。

<?php 
$args = array(
   \'post_type\'      => \'attachment\', // attachment post type
   \'post_status\'    => \'inherit\', // all attachments have this post status
   \'post_mime_type\' => \'image\', // make sure you get images only
   \'posts_per_page\' => 5 // however many images you want
);

在循环浏览图像时，可以使用wp_get_attachment_image 或wp_get_attachment_image_src 分别获取图像HTML或图像URL。

<?php
$attachments = get_posts($args); // args from above
foreach($attachments as $a)
{
   // replace `thumbnail` with an appropriate image size
   echo wp_get_attachment_image($a->ID, \'thumbnail\');
}

您还需要阅读widgets API 用于创建小部件。法典有一个basic example. 还有很多教程，下面是one I wrote.