顯示最多3個相關文章的代碼： ``` <?php global $post; $cats = wp_get_post_categories($post->ID); if ($cats) { $args = array( 'category__in' => array( $cats[0] ), 'post__not_in' => array( $post->ID ), 'showposts' => 3, 'caller_get_posts' => 1 ); query_posts($args); if (have_posts()) { while (have_posts()) { the_post(); update_post_caches($posts); ?> <!-- 內容 --> <?php } } else { ?> * 暫無相關文章 <?php } wp_reset_query(); } else { ?> * 暫無相關文章 <?php } ?> ``` 參考： [https://www.4xseo.com/blog/9361/](https://www.4xseo.com/blog/9361/)