Вывод похожих записей по тегу, а именно согласно количеству привязанных записей к тегу

<?php $tags = wp_get_post_tags($post->ID);
if ($tags) {
 $tag_ids = array();
 foreach($tags as $individual_tag) $tag_ids[] = $individual_tag->term_id;
 $args=array(
 'tag__in' => $tag_ids,
 'post__not_in' => array($post->ID),
 'tag__in' => $tag_ids,
 'caller_get_posts'=>1,
 'showposts'=>5
 );
$my_query = new wp_query($args); if( $my_query->have_posts() ) { echo '<ul>'; while ($my_query->have_posts()) { $my_query->the_post(); ?>
<li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
<?php } echo '</ul>'; } wp_reset_query(); } ?> 
<?php } else { ?>

$tags = wp_get_post_tags( $post->ID );
$tag_ids = wp_list_pluck( $tags, 'term_id' );
$args = [
    'tag__in' => $tag_ids,
    'post_type' => 'post',
    'post__not_in' => array($post->ID),
    'tag__in' => $tag_ids,
    'ignore_sticky_posts'=>true,
    'showposts'=>5,
    'orderby'=>'post_tag',
    'order'=>'desc'
];
add_filter('posts_clauses', 'orderby_tax_clauses', 10, 2 );
$query = new WP_Query( $args );
remove_filter('posts_clauses','orderby_tax_clauses');
while ( $query->have_posts() ) {
    $query->the_post();
    # здесь шпарим свой код вывода связанных постов
    echo "<h2>".the_title()."</h2>";
    # end 
}

function orderby_tax_clauses( $clauses, $wp_query ) {
    global $wpdb;
    $taxonomies = get_taxonomies();
    foreach ($taxonomies as $taxonomy) {
        if ( isset( $wp_query->query['orderby'] ) && $taxonomy == $wp_query->query['orderby'] ) {
            $clauses['join'] .=<<<SQL
            LEFT JOIN {$wpdb->term_taxonomy} USING (term_taxonomy_id)
            LEFT JOIN {$wpdb->terms} USING (term_id)
SQL;
            $clauses['where'] .= " AND (taxonomy = '{$taxonomy}' OR taxonomy IS NULL)";
            $clauses['groupby'] = "object_id";
            $clauses['orderby'] = "GROUP_CONCAT({$wpdb->terms}.name ORDER BY {$wpdb->term_taxonomy}.count ASC) ";
            $clauses['orderby'] .= ( 'ASC' == strtoupper( $wp_query->get('order') ) ) ? 'ASC' : 'DESC';
        }
    }
    return $clauses;
}

$tags = wp_get_post_tags( $post->ID );
$tag_ids = wp_list_pluck( $tags, 'term_id' );
$args = [
    'tag__in' => $tag_ids,
    'post_type' => 'post',
    'post__not_in' => array($post->ID),
    'tag__in' => $tag_ids,
    'ignore_sticky_posts'=>true,
    'showposts'=>5,
    'orderby'=>'post_tag',
    'order'=>'asc'
];
add_filter('posts_clauses', 'orderby_tax_clauses', 10, 2 );
$query = new WP_Query( $args );
remove_filter('posts_clauses','orderby_tax_clauses');
while ( $query->have_posts() ) {
    $query->the_post();
    # здесь шпарим свой код вывода связанных постов
    echo "<h2>".the_title()."</h2>";
    # end
}

function orderby_tax_clauses( $clauses, $wp_query ) {
    global $wpdb;
    $taxonomies = get_taxonomies();
    foreach ($taxonomies as $taxonomy) {
        if ( isset( $wp_query->query['orderby'] ) && $taxonomy == $wp_query->query['orderby'] ) {
            $clauses['join'] .=<<<SQL
            LEFT JOIN {$wpdb->term_taxonomy} USING (term_taxonomy_id)
            LEFT JOIN {$wpdb->terms} USING (term_id)
SQL;
            $clauses['where'] .= " AND (taxonomy = '{$taxonomy}' OR taxonomy IS NULL)";
            $clauses['groupby'] = "object_id";
            $clauses['orderby'] = "{$wpdb->term_taxonomy}.count ";
            $clauses['orderby'] .= ( 'ASC' == strtoupper( $wp_query->get('order') ) ) ? 'ASC' : 'DESC';
        }
    }
    return $clauses;
}