dedecms关键词维护里面字数多的词优先字数少的词的解决办法

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>)#isU", '\1-]-\4-[-\6', $body);

 
 $query = "SELECT * FROM #【分隔符】@__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;
     $kaarr[] = "$key";
 }

 // 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("#()#isU", '\1>\3<\4', $body);
 return $body;
    }

    function ReplaceKeyword($kw,&$body)
    {
    global $cfg_cmspath,$dsql;
    $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>)/isU", '\1-]-\4-[-\6', $body);
    $query="SELECT * FROM #【分隔符】@__keywords WHERe rpurl<>'' and sta=1 ORDER BY length(keyword)desc";
    $dsql->SetQuery($query);
    $dsql->Execute();
    while($row = $dsql->GetArray())
    {
    $key = trim($row['keyword']);
    $key_url=trim($row['rpurl']);
    $karr[] = $key;
    $kaarr[] = "$key";
    }
    foreach ($karr as $key => $word)
    {
    $body = preg_replace("/(^|>)([^<]+)(?=<|$)/sUe", "_highlight('\2', $karr[$key], $kaarr[$key],


'\1')", $body);
    //echo $body."
";
    //恢复超链接
    $body = preg_replace("/()/isU", '\1>\3<\4', $body);//暂时屏蔽超链接
    $body = preg_replace("/()(.*)(<)(/a>)/isU", '\1-]-\4-[-\6', $body);
    }
    //恢复超链接
    $body = preg_replace("/()/isU", '\1>\3<\4', $body);


    return $body;
    }
    }
    //End Archives
    //高亮专用, 替换多次是可能不能达到最多次
    function _highlight($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){
    $string = preg_replace("/".preg_quote($words)."/", $result, $string, $cfg_replace_num);
    if(strpos($string, $words) !== false)
    {
 $GLOBALS['replaced'][$words] = 1;
 }
 }
else{$string = str_replace($words, $result, $string);
}
return $pre.$string;
}