升级到dedecms 5.7文档关键词代码部分细节警示

/**
         * 高亮问题修正, 排除alt title <a></a>直接的字符替换
         *
         * @param string $kw
         * @param string $body
         * @return string
         */
        function ReplaceKeyword($kw,&$body)
        {
                global $cfg_cmspath;
                $maxkey = 5;
                $kws = explode(",",trim($kw));        //以分好为间隔符
                $i=0;
                $karr = $kaarr = $GLOBALS['replaced'] = array();

                //暂时屏蔽超链接
                $body = preg_replace("/(<a(.*))(>)(.*)(<)(\/a>)/isU", '\\1-]-\\4-[-\\6', $body);

                foreach($kws as $k)
                {
                        $k = trim($k);
                        if($k!="")
                        {
                                if($i > $maxkey)
                                {
                                        break;
                                }
                                $myrow = $this->dsql->GetOne("select * from dede58_keywords where keyword='$k' And rpurl<>'' ");
                                if(is_array($myrow))
                                {
                                        $karr[] = $k;
                                        $GLOBALS['replaced'][$k] = 0;
                                        $kaarr[] = "<a href='{$myrow['rpurl']}'><u>$k</u></a>";
                                }
                                $i++;
                        }
                }
                $body = preg_replace("/(^|>)([^<]+)(?=<|$)/sUe", "_highlight('\\2', \$karr, \$kaarr, '\\1')", $body);

                //恢复超链接
                $body = preg_replace("/(<a(.*))-\]-(.*)-\[-(\/a>)/isU", '\\1>\\3<\\4', $body);
                return $body;
        }

function ReplaceKeyword($kw,&$body)
    {
        global $cfg_cmspath;
        $maxkey = 5;
        $kws = explode(",",trim($kw));    //以分好为间隔符
        $i=0;
        $karr = $kaarr = $GLOBALS['replaced'] = array();

        //暂时屏蔽超链接
        $body = preg_replace("#(<a(.*))(>)(.*)(<)(\/a>)#isU", '\\1-]-\\4-[-\\6', $body);

        /*
        foreach($kws as $k)
        {
            $k = trim($k);
            if($k!="")
            {
                if($i > $maxkey)
                {
                    break;
                }
                $myrow = $this->dsql->GetOne("SELECT * FROM dede58_keywords WHERE keyword='$k' AND rpurl<>'' ");
                if(is_array($myrow))
                {
                    $karr[] = $k;
                    $GLOBALS['replaced'][$k] = 0;
                    $kaarr[] = "<a href='{$myrow['rpurl']}'><u>$k</u></a>";
                }
                $i++;
            }
        }
        */
        $query = "SELECT * FROM dede58_keywords WHERE rpurl<>'' ORDER BY rank DESC"; 
        $this->dsql->SetQuery($query);
        $this->dsql->Execute();
        while($row = $this->dsql->GetArray())
        {
            $key = trim($row['keyword']);
            $key_url=trim($row['rpurl']);
            $karr[] = $key;
            $kaarr[] = "<a href='$key_url' target='_blank'><u>$key</u></a>";
        }

        // 这里可能会有错误
        $body = @preg_replace("#(^|>)([^<]+)(?=<|$)#sUe", "_highlight('\\2', \$karr, \$kaarr, '\\1')", $body);

        //恢复超链接
        $body = preg_replace("#(<a(.*))-\]-(.*)-\[-(\/a>)#isU", '\\1>\\3<\\4', $body);
        return $body;
    }