不使用插件让WordPress按分类自动调用相关文章 – WordPress 教程

在WordPress文章后面列出相关文章，可以方便读者浏览更多相关的内容，通过下面的代码即可实现自动显示相关文章（按分类）。

首先，将下面的代码粘贴到你的主题functions.php文件中：

// "More from This Category" list by Barış Ünver @ Wptuts+  function wptuts_more_from_cat( $title = "More From This Category:" ) {      global $post;      // We should get the first category of the post      $categories = get_the_category( $post->ID );      $first_cat = $categories[0]->cat_ID;      // Let's start the $output by displaying the title and opening the <ul>      $output = '<div id="more-from-cat"><h3>' . $title . '</h3>';      // The arguments of the post list!      $args = array(          // It should be in the first category of our post:          'category__in' => array( $first_cat ),          // Our post should NOT be in the list:          'post__not_in' => array( $post->ID ),          // ...And it should fetch 5 posts - you can change this number if you like:          'posts_per_page' => 5      );      // The get_posts() function      $posts = get_posts( $args );      if( $posts ) {          $output .= '<ul>';          // Let's start the loop!          foreach( $posts as $post ) {              setup_postdata( $post );              $post_title = get_the_title();              $permalink = get_permalink();              $output .= '<li><a href="' . $permalink . '" title="' . esc_attr( $post_title ) . '">' . $post_title . '</a></li>';          }          $output .= '</ul>';      } else {          // If there are no posts, we should return something, too!          $output .= '<p>Sorry, this category has just one post and you just read it!</p>';      }      // Let's close the <div> and return the $output:      $output .= '</div>';      return $output;  }  

之后，打开single.php文件，在适当位置添加调用函数：

<?php echo wptuts_more_from_cat( 'More From This Category:' ); ?>