打开 /dede/article_add.php 文件，找到以下代码行：
if(empty($click)) $click = ($cfg_arc_click=='-1' ? mt_rand(50, 200) : $cfg_arc_click);

在其下方添加以下代码：
if(!empty($title) && $cfg_check_title=='Y')
{
    $row = $dsql->GetOne("SELECT id FROM `dede_archives` WHERE title LIKE '$title' ");
    if(is_array($row))
    {
        if(empty($typeid))
        {
            ShowMsg("请指定文档的栏目！","-1");
            exit();
        }
        if(empty($channelid))
        {
            ShowMsg("文档为非指定的类型，请检查你发布内容的表单是否合法！","-1");
            exit();
        }
        if(!CheckChannel($typeid,$channelid))
        {
            ShowMsg("你所选择的栏目与当前模型不相符，请选择白色的选项！","-1");
            exit();
        }
        if(!TestPurview('a_New'))
        {
            CheckCatalog($typeid,"对不起，你没有操作栏目 {$typeid} 的权限！");
        }

        // 对保存的内容进行处理
        $id = $row['id'];
        $pubdate = GetMkTime($pubdate);
        $sortrank = AddDay($pubdate,$sortup);
        $ismake = $ishtml==0 ? -1 : 0;
        $autokey = 1;
        $title = dede_htmlspecialchars(cn_substrR($title,$cfg_title_maxlen));
        $shorttitle = $shorttitle;
        $color = cn_substrR($color,7);
        $writer = $writer;
        $source = $source;
        $description = cn_substrR($description,250);
        $keywords = trim(cn_substrR($keywords,60));
        $filename = trim(cn_substrR($filename,40));
        $isremote = (empty($isremote)? 0 : $isremote);
        $serviterm=empty($serviterm)? "" : $serviterm;
        if(!TestPurview('a_Check,a_AccCheck,a_MyCheck'))
        {
            $arcrank = -1;
        }
        $adminid = $cuserLogin->getUserID();

        // 处理上传的缩略图
        if(empty($ddisremote))
        {
            $ddisremote = 0;
        }
        $litpic = GetDDImage('none',$picname,$ddisremote);

        // 分析body里的内容
        $body = AnalyseHtmlBody($body,$description,$litpic,$keywords,'htmltext');

        // 分析处理附加表数据
        $inadd_f = '';
        $inadd_v = '';
        if(!empty($dede_addonfields))
        {
            $addonfields = explode(';',$dede_addonfields);
            $inadd_f = '';
            $inadd_v = '';
            if(is_array($addonfields))
            {
                foreach($addonfields as $v)
                {
                    if($v=='')
                    {
                        continue;
                    }
                    $vs = explode(',',$v);
                    if($vs[1]=='htmltext'||$vs[1]=='textdata') //HTML文本特殊处理
                    {
                        ${$vs[0]} = AnalyseHtmlBody(${$vs[0]},$description,$litpic,$keywords,$vs[1]);
                    }
                    else
                    {
                        if(!isset(${$vs[0]}))
                        {
                            ${$vs[0]} = '';
                        }
                        ${$vs[0]} = GetFieldValueA(${$vs[0]},$vs[1],$id);
                    }
                    $inadd_f .= ",`{$vs[0]}` = '".${$vs[0]}."'";
                }
            }
        }

        // 处理图片文档的自定义属性
        if($litpic!='' && !preg_match("..."))
    }
}