php将数据写入excel

//header("Content-type: text/html; charset=utf-8");
//include_once 'PHPExcel.php';

/**

     * 生成excel
     * @param $list
     */
    public function excel($list,$excelName='brand') {
        // 创建新的PHPExcel对象    
        $objPHPExcel = new PHPExcel();  
        // 设置属性    
        $objPHPExcel->getProperties()->setCreator("ctos")  
                ->setLastModifiedBy("ctos")  
                ->setTitle("Office 2007 XLSX Test Document")  
                ->setSubject("Office 2007 XLSX Test Document")  
                ->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")  
                ->setKeywords("office 2007 openxml php")  
                ->setCategory("Test result file");  
      
        // 字体宽度    
        $objPHPExcel->getActiveSheet()->getColumnDimension('A')->setWidth(20);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('B')->setWidth(40);  
      
        // 设置行高度    
        $objPHPExcel->getActiveSheet()->getRowDimension('1')->setRowHeight(22);
        $objPHPExcel->getActiveSheet()->getRowDimension('2')->setRowHeight(20);   
      
        // 设置水平居中    
        $objPHPExcel->getActiveSheet()->getStyle('A')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('B')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  

        // 表头  
        $objPHPExcel->setActiveSheetIndex(0)  
                ->setCellValue('A1', '品牌')  
                ->setCellValue('B1', '系列');  
        // 内容  
        $i = 2;
        foreach($list as $key => $item ){
            foreach($item as $k => $v ){    
                $objPHPExcel->getActiveSheet(0)->setCellValue('A'.$i, $key);  
                $objPHPExcel->getActiveSheet(0)->setCellValue('B'.$i, $v['goname'].'__'.$v['name']);  
                ++$i;
            }
        }  
      
        // 重命名工作表   
        $objPHPExcel->getActiveSheet()->setTitle('车信息');  
        // 第一张工作表组活跃表索引,所以Excel打开这是第一个表   
        $objPHPExcel->setActiveSheetIndex(0);  
      
        // 输出  
        header('Content-Type: application/vnd.ms-excel');  
        header('Content-Disposition: attachment;filename="' . $excelName . '.xls"');  
        header('Cache-Control: max-age=0');  
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
        $objWriter->save('php://output');  
    }