以前通常都是使用得插件实现，那现在可以不用插件即可实现，如果你是喜欢折腾您的博客的可以来尝试改动一下，下面是改动步骤

首先打开include/model/comment_model.php文件，

找到while ($row = $this->db->fetch_array($ret)) {（即第45行）在这里增加一个获取useragent的信息,代码$row['useragent'] = htmlspecialchars($row['useragent']);

其次在249行的评论提交中增加一个useragent的信息到数据库里，修改代码如下：

function addComment($name, $content, $mail, $url, $imgcode, $blogId, $pid) 
    {
        $ipaddr = getIp();
        $useragent = $_SERVER['HTTP_USER_AGENT'];
        $utctimestamp = time();

        if($pid != 0) {
            $comment = $this->getOneComment($pid);
            $content = '@' . addslashes($comment['poster']) . '：' . $content;
        }

        $ischkcomment = Option::get('ischkcomment');
        $hide = ROLE == ROLE_VISITOR ? $ischkcomment : 'n';

        $sql = 'INSERT INTO '.DB_PREFIX."comment (date,poster,gid,comment,mail,url,hide,ip,pid,useragent)
                VALUES ('$utctimestamp','$name','$blogId','$content','$mail','$url','$hide','$ipaddr','$pid','$useragent')";
        $ret = $this->db->query($sql);
        $cid = $this->db->insert_id();
        $CACHE = Cache::getInstance();

        if ($hide == 'n') {
            $this->db->query('UPDATE '.DB_PREFIX."blog SET comnum = comnum + 1 WHERE gid='$blogId'");
            $CACHE->updateCache(array('sta', 'comment'));
            doAction('comment_saved', $cid);
            emDirect(Url::log($blogId).'#'.$cid);
        } else {
            $CACHE->updateCache('sta');
            doAction('comment_saved', $cid);
            emMsg('评论发表成功，请等待管理员审核', Url::log($blogId));
        }
    }

将以上代码覆盖到function addComment(){}中就可以了

<?php
//获取评论用户操作系统、浏览器等信息
function useragent($info){
    require_once 'useragent.class.php';
    $useragent = UserAgentFactory::analyze($info);
?>
<img src="<?php echo TEMPLATE_URL.$useragent->platform['image']?>">&nbsp;<?php echo $useragent->platform['title']; ?>&nbsp;
<img src="<?php echo TEMPLATE_URL.$useragent->browser['image']?>">&nbsp;<?php echo $useragent->browser['title']; ?>
<?php
}
?>

调用格式：<?php echo useragent($comment['useragent']); ?> 将这段写如到您的评论列表与子评论列表适当位置即可

本文转载自：独狼博客