我想在同一个类别的单页上随机显示8篇文章。

<?php
    global $post;
    $categories = get_the_category();
    foreach ($categories as $category) :
    $args = array( \'numberposts\' => 8, \'orderby\' => \'rand\', \'category\' => $category->term_id);
    var_dump($category->term_id);
    $rand_posts = get_posts( $args );
    foreach( $rand_posts as $post ) :
    ?>

    <li><?php the_post_thumbnail(); ?><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><span><?php the_title(); ?></span></a></li>
    <?php endforeach; ?>
    <?php endforeach; ?>

。。但如果帖子有2个或更多类别，它会列出16/24/32个帖子。我希望任何人都能帮助我。谢谢