分享几个WordPress不用插件调用随机文章的方法，不仅增强用户粘性，而且当蜘蛛来爬你的文章的时候每次都会有变化，搜索引擎很喜欢。主要用到的是orderby rand参数，下面就一起来看看吧。

1、最直接的用法，在需要的位置放入下面的代码。

<?php
$args = array( 'numberposts' => 5, 'orderby' => 'rand', 'post_status' => 'publish' );
$rand_posts = get_posts( $args );
foreach( $rand_posts as $post ) : ?>
<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; ?>

2、用query_posts生成随机文章列表

<?php
query_posts(array('orderby' => 'rand', 'showposts' => 2));
if (have_posts()) :
while (have_posts()) : the_post();?>
<a href="<?php the_permalink() ?>" rel="bookmark"><?php the_title(); ?></a>
<?php endwhile; ?>
<?php endif; ?>

<?php
query_posts(array('orderby' => 'rand', 'showposts' => 1));
if (have_posts()) :
while (have_posts()) : the_post();
the_title(); //这行去掉就不显示标题
the_excerpt(); //去掉这个就不显示摘要了
endwhile;
endif; ?>

3、调用同分类随机文章

<?php
$cat = get_the_category();
foreach($cat as $key=>$category){
$catid = $category->term_id;
}
$args = array('orderby' => 'rand','showposts' => 8,'cat' => $catid );
$query_posts = new WP_Query();
$query_posts->query($args);
while ($query_posts->have_posts()) : $query_posts->the_post();
?>
<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endwhile;?>
<?php wp_reset_query(); ?>

4、用wp_query函数

<?php
$args = array(
'post_type' => 'post',
'showposts' => 4,
'orderby' => 'rand',
'cat' => -36,//除了id为36的分类
);
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
while ($my_query->have_posts()) : $my_query->the_post(); ?>
<div class="item">
<a href="<?php the_permalink(); ?>" class="box">
<?php the_post_thumbnail( array(285,360) ); ?>
<div class="text">
<strong><?php the_title();?></strong>
</div>
</a>
</div>
<?php endwhile; wp_reset_query(); } ?>

5、主题function定义

/**
* 随机文章
*/
function random_posts($posts_num=5,$before='<li>',$after='</li>'){
global $wpdb;
$sql = "SELECT ID, post_title,guid
FROM $wpdb->posts
WHERE post_status = 'publish' ";
$sql .= "AND post_title != '' ";
$sql .= "AND post_password ='' ";
$sql .= "AND post_type = 'post' ";
$sql .= "ORDER BY RAND() LIMIT 0 , $posts_num ";
$randposts = $wpdb->get_results($sql);
$output = '';
foreach ($randposts as $randpost) {
$post_title = stripslashes($randpost->post_title);
$permalink = get_permalink($randpost->ID);
$output .= $before.'<a href="'
. $permalink . '" rel="bookmark" title="';
$output .= $post_title . '">' . $post_title . '</a>';
$output .= $after;
}
echo $output;
}

然后在想要显示随机文章的地方加入如下代码：

<div class="right">
<h3>随便找点看看！</h3>
<ul>
<?php random_posts(); ?>
</ul>
</div><!-- 随机文章 -->