织梦文档关键词维护中设置词语重叠后出错的修改方法

  /**
     * 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);

        // $query = "SELECT * FROM keywords WHERE rpurl<>'' ORDER BY rank DESC"; // 原版的
$query="SELECT * FROM `keywords` WHERE rpurl<>'' and sta=1 ORDER BY length(keyword) DESC"; // 修改 优先处理长关键词
        $this->dsql->SetQuery($query);
        $this->dsql->Execute();
        while($row = $this->dsql->GetArray())
        {
            $key = trim($row['keyword']);
            $key_url=trim($row['rpurl']);
            $karr[] = $key;
            $kaarr[] = "<a class='title-prefix' href='$key_url' target='_blank'>$key</a>"; // 删除 <u> 和 </u> ，增加class属性
        }

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

foreach ($karr as $key => $word)
{  
$body = preg_replace("/(^|>)([^<]+)(?=<|$)/sUe", "_highlight('\2', $karr[$key], $kaarr[$key], '\1')", $body);  
//echo $body."<br/>";  
//恢复超链接  
$body = preg_replace("/(<a(.*))-]-(.*)-[-(/a>)/isU", '\1>\3<\4', $body);  
//暂时屏蔽超链接  
$body = preg_replace("/(<a(.*))(>)(.*)(<)(/a>)/isU", '\1-]-\4-[-\6', $body);  
}

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

//高亮专用, 替换多次是可能不能达到最多次
function _highlight($string, $words, $result, $pre)
{
    global $cfg_replace_num;
    $string = str_replace('"', '"', $string);
if($GLOBALS['replaced'][$words] == 1){
return $pre.$string;
}
    if($cfg_replace_num > 0)
    {
        // foreach ($words as $key => $word)
        // {
        //     if($GLOBALS['replaced'][$word] == 1)
        //     {
        //         continue;
        //     }
            //$string = preg_replace("#".preg_quote($key)."#", $result[$key], $string, $cfg_replace_num);
            $string = preg_replace("#".preg_quote($words)."#", $result, $string, $cfg_replace_num);  // 修改后
            if(strpos($string, $words) !== FALSE)
            {
                $GLOBALS['replaced'][$words] = 1;
            }
        // }
    }
    else
    {
        $string = str_replace($words, $result, $string);
    }
    return $pre.$string;
}