请大家看看我的代码有问题没？

pxllonga

$rs =$this->dbCon->query("select polid,rtd,time,st,mn from samplindb where time between '$from' and '$to' limit $index,$length;");
while($result=$this->dbCon->fetch_row($rs))
  {
   $resultArray[] = $result;
  }

试下