WordPress — выводим самые популярные теги в последних постах

function getLastTags($number = 7, $numberposts = 10)
{
    $output = '<ul class="nav navbar-nav">';
    $recent_posts = wp_get_recent_posts(array('post_status' => 'publish', 'numberposts' => $numberposts));
    $tagIds = array();
    $tags = array();
    foreach ($recent_posts as $recent_post) {
        $postTags = wp_get_post_tags($recent_post['ID']);
        foreach ($postTags as $tag) {
            if(!isset($tagIds[$tag->term_id])) {
                $tagIds[$tag->term_id] = 1;
                $tags[$tag->term_id] = $tag;
            } else {
                $tagIds[$tag->term_id]++;
            }
        }
    }
    arsort($tagIds);
    $tagIds = array_slice($tagIds, 0, $number, true);
    foreach ($tagIds as $tagId => $counter) {
        $output .= '<li><a href="' . get_tag_link($tags[$tagId]->term_id) . '" rel="tag">' . $tags[$tagId]->name . '</a></li>';
    }
    $output .= '</ul>';
 
    return $output;
}