我购买了一个具有相关帖子功能的主题，但它按最新版本进行排序，因此同一类别中的所有我的帖子都具有相同的相关帖子内容。我想将此设置为随机，但不知道如何设置。尝试在这里查看一些帖子，但它被wordpress网站崩溃了。

感谢advanced中的帮助！

<?php 

$orig_post = $post;
global $post;

$categories = get_the_category($post->ID);

if ($categories) {

    $category_ids = array();

    foreach($categories as $individual_category) $category_ids[] = $individual_category->term_id;

    if(vp_metabox(\'manna_post.post_size\') == \'full_post\' && is_single()) :
    $args = array(
        \'category__in\'        => $category_ids,
        \'post__not_in\'        => array($post->ID),
        \'posts_per_page\'      => 5, // Number of related posts that will be shown.
        \'ignore_sticky_posts\' => 1
    );
    else :
    $args = array(
        \'category__in\'        => $category_ids,
        \'post__not_in\'        => array($post->ID),
        \'posts_per_page\'      => 4, // Number of related posts that will be shown.
        \'ignore_sticky_posts\' => 1
    );
    endif;

    $my_query = new wp_query( $args );

    if( $my_query->have_posts() ) { ?>
        <div class="post-related"><h4 class="block-heading"><span><?php _e(\'You Might Also Like\', \'cassia\'); ?></span></h4><ul>
        <?php if(vp_metabox(\'manna_post.post_size\') == \'full_post\' && is_single()) : ?>
        <?php while( $my_query->have_posts() ) :
            $my_query->the_post();?> 
            <li>
            <div class="related-item full">
                <?php $url = wp_get_attachment_url( get_post_thumbnail_id($post->ID) ); ?>
                <a href="<?php echo get_permalink() ?>" rel="bookmark"><img src="<?php echo aq_resize($url,176,130,true,true,true); ?>" /></a>
                <h4><a href="<?php echo get_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>"><?php the_title(); ?></a></h4>


            </div>
            </li>
        <?php
         endwhile;
         else : ?>
        <?php while( $my_query->have_posts() ) :
            $my_query->the_post(); ?>
            <li>
            <div class="related-item">
                <?php if (  (function_exists(\'has_post_thumbnail\')) && (has_post_thumbnail())  ) { ?>
                    <a href="<?php echo get_permalink() ?>" rel="bookmark"><?php the_post_thumbnail(\'related\'); ?></a>
                <?php } ?>
                <h4><a href="<?php echo get_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>"><?php the_title(); ?><br><br><?php the_time( get_option(\'date_format\') ); ?></a></h4>



            </div>
            </li>
        <?php
        endwhile;
        endif;

        echo \'</ul></div>\';
    } else {
        if(is_home() || is_archive()) {
        echo \'<div class="related-divider"></div>\';
        }
    }
}
$post = $orig_post;
wp_reset_query();

?>