如何调用WordPress网站中文章的前5篇和后5篇？

　　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>