合并单元格导出

$num_arr = array_column($result,'order_num');
$arr = array_count_values($num_arr);
foreach ($arr as $kk=>$vv) {
  if($vv>1){
    $keys = array_keys($num_arr,$kk);
    $end = $keys[count($keys)-1]+2;
    $start = $end-$vv+1;
    $objSheet->mergeCells('A'.$start.":".'A'.$end);
    $objSheet->mergeCells('P'.$start.":".'P'.$end);
    $objSheet->mergeCells('Q'.$start.":".'Q'.$end);
                    ......
   }
  }
 }