Вывод последнего комментария в списке постов

<?php
    $post_id   = $item['id'];
    $last_comment = null;
 
    // Get the last comment for this post from db
    $config = cmsConfig::getInstance();
 
    if (isset($config->db_prefix)){
        $db_prefix = $config->db_prefix;
        $sql = "SELECT c.content, c.date_pub, c.id as comment_id, u.nickname, u.id as user_id, u.slug as user_slug, u.avatar, p.slug as post_slug, p.title as post_title
                FROM ".$db_prefix."comments c
                JOIN ".$db_prefix."users u ON c.user_id = u.id
                JOIN ".$db_prefix."con_posts p ON c.target_id = p.id
                WHERE c.target_id = ".$post_id."
                ORDER BY c.id DESC LIMIT 1";
 
        $result = cmsDatabase::getInstance()->query($sql);
        if($result && $result->num_rows > 0){
            $last_comment = $result->fetch_assoc();
        }
    }else{
        echo "Error: Prefix not available.";
        return;
    }
 
    if ($last_comment){
 
        $comment_url = '/'.$last_comment['post_slug'].'.html#comment_'.$last_comment['comment_id'];
        echo "<div class='last-comment' onclick=\"window.location.href = '".htmlspecialchars($comment_url)."';\" style='cursor: pointer;'> <p>";
 
        if(!empty($last_comment['user_slug'])){
            $profile_url = '/users/' . $last_comment['user_slug'];
        } else {
            $profile_url = '/users/' . $last_comment['user_id'];
        }
         $avatar_html = '';
        if (!empty($last_comment['avatar'])) {
            $avatar_html = html_avatar_image($last_comment['avatar'], 'small', $last_comment['nickname'], true);
        } else {
            $avatar_html = html_avatar_image_empty($last_comment['nickname'], 'avatar__small');
        }
 
        echo "<span class='comment-avatar mr-1'><a href='" . htmlspecialchars($profile_url) . "'>" . $avatar_html . "</a></span>";
        echo "<span class='comment-author'><a href='" . htmlspecialchars($profile_url) . "'>".htmlspecialchars($last_comment['nickname'])."</a></span>";
         echo "<span class='comment-time'>".lang_date(date('j F Y H:i', strtotime($last_comment['date_pub'])))."</span><br>";
        echo $last_comment['content'];
        echo "</p></div>";
    }
?>

.comment-avatar img{
  width:20px;
  border:1px solid var(--gc-border-light);
  border-radius:50%;
}
 
.last-comment {
  margin-top: 10px; /* Adds spacing above the comment */
  padding: 5px; /* Adds padding inside the comment */
  background-color: var(--body-bg);
  border-radius:10px;
  margin-left: -5px;
  margin-right: -5px;
}
 
.last-comment p {
  font-size: 0.9em; /* Adjusts the content font size */
    margin-bottom: 0.5rem;
        padding-left: 5px;
}
 
.last-comment .comment-author {
  color: var(--dark-color); /* Sets a color for the author's name */
    margin-right: 0.5rem;
}
 
.last-comment .comment-time {
  font-size: 0.8em; /* Adjusts the timestamp font size */
  color: var(--light-color); /* Sets a color for the timestamp */
}