wordpress调用同分类随机文章代码

<?php

$cat = get_the_category();

foreach($cat as $key=>$category){

$catid = $category->term_id;}

$args = array('orderby' => 'rand','showposts' => 8,'cat' => $catid ); // 显示篇数

$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(); ?>