您可以使用rand作为orderby检查以下代码

 $args = array(
         \'posts_per_page\'   => 5,
         \'offset\'           => 0,
         \'category\'         => \'\',
         \'category_name\'    => \'\',
         \'orderby\'          => \'post_date\',
         \'order\'            => \'rand\',
         \'include\'          => \'\',
         \'exclude\'          => \'\',
         \'meta_key\'         => \'\',
         \'meta_value\'       => \'\',
         \'post_type\'        => \'post\',
         \'post_mime_type\'   => \'\',
         \'post_parent\'      => \'\',
         \'post_status\'      => \'publish\',
         \'suppress_filters\' => true 
); 

$myposts = get_posts( $args );

使用以下代码：

<li><h2>Random Post</h2>
<ul>
<?php $posts = get_posts(\'orderby=rand&numberposts=5\'); foreach($posts as $post) { ?>
<li><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a>
</li>
<?php } ?>
</ul>
</li>