用thinkphp写的导出excel示例

function excel_import(){
    header("content-Type: text/html; charset=utf-8");
    import("@.ORG.PHPExcel");
    $sign = M("sign");
    $showtime=date("YmdHis");
    $keywords=empty($_GET['keywords'])?"":$_GET['keywords'];
    $starttime=empty($_GET['starttime'])?"":$_GET['starttime'];
    $endtime=empty($_GET['endtime'])?"":$_GET['endtime'];
    $condition=array(
      1=>1,
    );
    if(!empty($keywords)){
      $condition['b.username']=array("like","%".$keywords."%");
    }
    if((!empty($starttime)) && (!empty($endtime))){
      $condition['a.signtime']=array("between",$starttime.",".$endtime);
    }else{
      if(!empty($starttime)){
        $condition['a.signtime']=array("egt",$starttime);
      }
      if(!empty($endtime)){
        $condition['a.signtime']=array("elt",$endtime);
      }
    }
    $data = $sign->alias("a")->join("zp_member as b ON a.memberid=b.id")->where($condition)->field("a.*,b.username")->select();
    
    $name='Excelfile'.$showtime;    //生成的Excel文件文件名
    //$res=service('ExcelToArrary')->push($data,$name);
    error_reporting(E_ALL);
    date_default_timezone_set('Europe/London');
    $objPHPExcel = new PHPExcel();
    
    $objPHPExcel->setActiveSheetIndex(0)
    //设置表的名称标题
    ->setCellValue('A1',"姓名")
    ->setCellValue('B1',"签到时间");
    foreach($data as $k => $v){
      $num=$k+2;
      $time = date("Y-m-d H:i:s",$v['signtime']);
      $objPHPExcel->setActiveSheetIndex(0)
      //Excel的第A列
      ->setCellValue('A'.$num, $v['username'])    
      ->setCellValue('B'.$num, $time);
    }
    $objPHPExcel->getActiveSheet()->setTitle('签到记录');
    $objPHPExcel->setActiveSheetIndex(0);
    header('Content-Type: application/vnd.ms-excel');
    header('Content-Disposition: attachment;filename="'.$name.'.xls"');
    header('Cache-Control: max-age=0');
    $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
    $objWriter->save('php://output');
    exit();
  
  
  }