我试图显示多个类别的所有帖子的列表（如果有人回答这个问题，你可能还想包括组合标签，这可能会使这个答案对未来的搜索者来说更加全面）。

以下是我的工作内容：

此函数用于显示列表：

function my_custom_loop_three_posts($category, $tag, $offset) {
        $args=array(
          // showposts has been replaced, use \'posts_per_page\' instead
          // \'showposts\'        => 1,
          \'posts_per_page\'      => 3,
          // this has been replaced, use \'ignore_sticky_posts\'
          // \'caller_get_posts\' => 1,
          \'ignore_sticky_posts\' => true,
        );

        if ($category) {
          $args[\'cat\'] = $category;
        }

        if ($tag) {
          $args[\'tag\'] = $tag;
        }

        if ($offset) {
          $args[\'offset\'] = $offset;
        }

        $my_query = new WP_Query($args);
        // ... rest of function to output loop 

if( $my_query->have_posts() ) {
            while ($my_query->have_posts()) : $my_query->the_post(); ?>
             <div class="">
              <a href="<?php the_permalink() ?>" >
   <div class="menu-item-list-item menu-item-list-item-not-title">
      <?php the_title(); ?>
   </div>
              </a>
             </div>
            <?php
            endwhile;
        } //if ($my_query)

        wp_reset_query();  // Restore global post data stomped by the_post().   
 };


function myFilter($query) {
    if ($query->is_feed) {
        $query->set(\'cat\',\'-121\');
    }
return $query;
}
add_filter(\'pre_get_posts\',\'myFilter\');

<?php my_custom_loop_three_posts(330, NULL, 1); ?>