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，例如制作WordPress网站的上一篇、下一篇。除了这种之外，我们还可以调用当前文章的前5篇和后5篇形成相关文章。效果如下图：
WordPress建网站时，怎么自动调用当前文章的前5篇和后5篇呢？下面分享一下调用方法和代码。
方法/步骤
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 = %sAND 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;
}
<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>
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