我把它挖出来是为了帮助我修改wp\\u list\\u类别，并将最新帖子中的特色图片放在生成的li中。

class CategoryThumbnail_Walker extends Walker_Category {
    // A new element has been stumbled upon and has ended
    function end_el( &$output, $category, $depth, $args ) {
        // Output the standard link ending
        parent::end_el( &$output, $category, $depth, $args );

        // Get one post
        $posts = get_posts( array(
            // ...from this category
            \'category\' => $category->cat_ID,
            \'numberposts\' => 1
        ) );
        // If a post has been found
        if ( isset($posts[0]) ) {
            // Get its thumbnail and append it to the output
            $featured = get_the_post_thumbnail( $posts[0]->ID, \'extrathumb\', null );
            $output .= $featured;
        }
    }
}   

因此使用：-

<?php wp_list_categories( array(


                        \'show_count\' => 1,
                        \'walker\' => new CategoryThumbnail_Walker()) ); ?>

这几乎正是我想要的，输出特征图像以及类别名称和该类别的帖子数量。

唯一的问题是它将img输出到li之外，就像这样

<li class="cat-item cat-item-38"><a href="http://192.168.1.141:8888/category/around-the-web/" title="View all posts filed under Around The Web">Around The Web</a> <span class="post_count"> 1 </span>
</li>
<img width="79" height="79" src="http://192.168.1.141:8888/wp-content/uploads/2013/11/thanksgiving-day-parade-wind-79x79.jpg" class="attachment-extrathumb wp-post-image" alt="A lot could go awry.">

我需要那张照片在li类里面

有什么想法吗？

class CategoryThumbnail_Walker extends Walker_Category {
    // A new element has been stumbled upon and has ended
    function end_el( $output, $category, $depth, $args ) {
        // Get one post
        $posts = get_posts( array(
            // ...from this category
            \'category\' => $category->cat_ID,
            \'numberposts\' => 1
        ) );
        // If a post has been found
        if ( isset($posts[0]) ) {
            // Get its thumbnail and append it to the output
            $featured = get_the_post_thumbnail( $posts[0]->ID, \'extrathumb\', null );
            $output .= $featured;
        }

        // Output the standard link ending
        parent::end_el( $output, $category, $depth, $args );
    }
} 
wp_list_categories( 
  array(
    \'show_count\' => 1,
    \'walker\' => new CategoryThumbnail_Walker()
  ) 
);