thinkphp 3.2与phpexcel

public function out(){
        $data=array(
            array(‘username‘=>‘zhangsan‘,‘password‘=>"123456"),
            array(‘username‘=>‘lisi‘,‘password‘=>"abcdefg"),
            array(‘username‘=>‘wangwu‘,‘password‘=>"111111"),
            );
        //导入PHPExcel类库，因为PHPExcel没有用命名空间，只能inport导入
        import("Org.Util.PHPExcel");
        import("Org.Util.PHPExcel.Writer.Excel5");
        import("Org.Util.PHPExcel.IOFactory.php");

        $filename="test_excel";
        $headArr=array("用户名","密码");
        $this->getExcel($filename,$headArr,$data);
    }

    private    function getExcel($fileName,$headArr,$data){
            //对数据进行检验
            if(empty($data) || !is_array($data)){
                die("data must be a array");
            }
            //检查文件名
            if(empty($fileName)){
                exit;
            }

            $date = date("Y_m_d",time());
            $fileName .= "_{$date}.xls";

            //创建PHPExcel对象，注意，不能少了\
            $objPHPExcel = new \PHPExcel();
            $objProps = $objPHPExcel->getProperties();
            
            //设置表头
            $key = ord("A");
            foreach($headArr as $v){
                $colum = chr($key);
                $objPHPExcel->setActiveSheetIndex(0) ->setCellValue($colum.‘1‘, $v);
                $key += 1;
            }
            
            $column = 2;
            $objActSheet = $objPHPExcel->getActiveSheet();
            foreach($data as $key => $rows){ //行写入
                $span = ord("A");
                foreach($rows as $keyName=>$value){// 列写入
                    $j = chr($span);
                    $objActSheet->setCellValue($j.$column, $value);
                    $span++;
                }
                $column++;
        }

            $fileName = iconv("utf-8", "gb2312", $fileName);
            //重命名表
               // $objPHPExcel->getActiveSheet()->setTitle(‘test‘);
            //设置活动单指数到第一个表,所以Excel打开这是第一个表
            $objPHPExcel->setActiveSheetIndex(0);
            header(‘Content-Type: application/vnd.ms-excel‘);
            header("Content-Disposition: attachment;filename=\"$fileName\"");
            header(‘Cache-Control: max-age=0‘);

              $objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, ‘Excel5‘);
            $objWriter->save(‘php://output‘); //文件通过浏览器下载
            exit;
        }