dede织梦模板文档关键词维护“频率”的设置教程

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);         global $dsql;      $query="SELECT * FROM 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       $body = preg_replace("/()(.*)(<)(/a>)/isU",$body);         }         //恢复超链接      $body = preg_replace("/()/isU",$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)."/",$string,$cfg_replace_num);      if(strpos($string,$words) !== false)      {       $GLOBALS['replaced'][$words] = 1;       //echo $words;      }      }   else   {       $string = str_replace($words,$string);   }      return $pre.$string;   }