博悦天下
使用Wordpress建网站时，为了提高网站的PV值，可以给每篇文章添加相关文章，如何调用WordPress网站中文章的前5篇和后5篇？效果如下图：
WordPress建网站时，如何调用WordPress网站中文章的前5篇和后5篇？下面分享一下调用方法和代码。
方法/步骤
1. 将以下的PHP代码放到自己网站模板的函数文件functions.php中；
function ztmao_get_post( $previous = true, $number = 1 ) { //global当前文章变量 $post 和数据库操作类wpdb global $post, $wpdb; if ( emptyempty( $post ) ) return null; $current_post_date = $post->post_date;//当前文章的时间 $join = ''; $posts_in_ex_cats_sql = ''; //加入表 $join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id"; //获取当前文章所属分类,可以同属多个分类,如果是自定义的分类法,将category换成对应的分类法即可 $cat_array = wp_get_object_terms($post->ID, 'level', array('fields' => 'ids')); $join .= " AND tt.taxonomy = 'level' AND tt.term_id IN (" . implode(',', $cat_array) . ")"; //判断时间是大于还是小于 $op = $previous ? '<' : '>'; //排序 $order = $previous ? 'DESC' : 'ASC'; $where = $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = 'publish' ", $current_post_date, $post->post_type); $sort = "ORDER BY p.post_date $order LIMIT 0, $number"; $query = "SELECT p.* FROM $wpdb->posts AS p $join $where $sort"; $query_key = 'adjacent_post_' . md5($query); $result = wp_cache_get($query_key, 'counts'); if ( false !== $result ) return $result; $result = $wpdb->get_results("SELECT p.* FROM $wpdb->posts AS p $join $where $sort"); if ( null === $result ) $result = ''; wp_cache_set($query_key, $result, 'counts'); return $result; }2.使用以下的代码进行前5篇后5篇文章的调用。
<h4>前几篇文章</h4> <ul> <?php $preposts = v7v3_get_post(true,3); foreach( $preposts as $postt ){ echo '<li><a href="'.get_permalink($postt->ID).'" title="'.$postt->post_title .'">'.$postt->post_title .'</a></li>'; }; ?> </ul> <h4>后几篇文章</h4> <ul> <?php $nextposts = ztmao_get_post(false,3); foreach( $nextposts as $postt ){ echo '<li><a href="'.get_permalink($postt->ID).'" title="'.$postt->post_title .'">'.$postt->post_title .'</a></li>'; }; ?> </ul>
