/除去字串中的重复词，生成索引字符串，字符串参数为已经分词处理的串
  //--------------------------------------------------
  function getindextext($okstr,$ilen=-1)
  {
    if($okstr==) return ;
    $ws = explode( ,$okstr);
    $okstr = ;
    $wks = ;
    foreach($ws as $w)
    {
      $w = trim($w);
      //排除小于2的字符
      if(strlen($w)      //排除数字或日期
      if(!ereg([^0-9:-],$w)) continue;
      if(strlen($w)==2&&ord($w[0])>0x80) continue;
      if(isset($wks[$w])) $wks[$w]++;
      else $wks[$w] = 1;
    }
    if(is_array($wks))
    {
      arsort($wks);
      if($ilen==-1)
      { foreach($wks as $w=>$v) $okstr .= $w. ; }
      else
      {
        foreach($wks as $w=>$v){
          if((strlen($okstr)+strlen($w)+1)          else break;
        }
      }
    }
    return trim($okstr);
  }?>
http://www.bkjia.com/phpjc/444908.htmlwww.bkjia.comtruehttp://www.bkjia.com/phpjc/444908.htmltecharticle/除去字串中的重复词，生成索引字符串，字符串参数为已经分词处理的串 //-------------------------------------------------- function getindextext($okstr,...