thinkphp 5.0 excel导出

public function excel()
    {
        //查找要导出的数据表
        $list = Db::table(\'eb_brand\')->select();
        //导出的文件名称
        $file_name = date(\'Y-m-d_H:i:s\') . \'表格\' . \'.xls\';
        dirname(__FILE__);
        $PHPExcel=new \PHPExcel();
        $objWriter = new \PHPExcel_Writer_Excel2007($PHPExcel);
        $PHPSheet = $PHPExcel->getActiveSheet();

        //设置水平居中
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'A\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'B\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'C\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'D\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        // 设置个表格标题
        $PHPSheet->setTitle("代理商");
        $PHPSheet->setCellValue("A1", "ID");
        $PHPSheet->setCellValue("B1", "品牌名称");
        $PHPSheet->setCellValue("C1", "排序");
        $PHPSheet->setCellValue("D1", "图片地址");

        //设置表格宽度
        $PHPExcel->getActiveSheet()->getColumnDimension(\'A\')->setWidth(20);
        $PHPExcel->getActiveSheet()->getColumnDimension(\'B\')->setWidth(20);
        $PHPExcel->getActiveSheet()->getColumnDimension(\'C\')->setWidth(20);
        $PHPExcel->getActiveSheet()->getColumnDimension(\'D\')->setWidth(80);

        // 设置垂直居中
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'A\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'B\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'C\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $PHPExcel->setActiveSheetIndex(0)->getStyle(\'D\')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $i = 2;
        foreach ($list as $key => $value) {
            $PHPSheet->setCellValue(\'A\' . $i, \'\' . $value[\'id\']);
            $PHPSheet->setCellValue(\'B\' . $i, \'\' . $value[\'bname\']);
            $PHPSheet->setCellValue(\'C\' . $i, \'\' . $value[\'sort\']);

            //获取到图片信息
            $img = DB::table(\'eb_brand\')->where(\'id\', $value[\'id\'])->field(\'image_input\')->find();

            $objDrawing[$key] = new \PHPExcel_Worksheet_Drawing();
            $objDrawing[$key]->setPath(\'.\' . $img[\'image_input\']);   //这里拼接 . 是因为要在根目录下获取

            $objDrawing[$key]->setHeight(20);//照片高度
            $objDrawing[$key]->setWidth(70); //照片宽度

            $objDrawing[$key]->setCoordinates(\'D\' . $key);

            // 图片偏移距离
            $objDrawing[$key]->setOffsetX(12);
            $objDrawing[$key]->setOffsetY(12);
            $objDrawing[$key]->setWorksheet($PHPExcel->getActiveSheet());
//            $PHPSheet->setCellValue(\'D\'.$i,\'\'.$value[\'image_input\']);
            $i++;
        }


        $PHPExcel->setActiveSheetIndex(0);
        $objWriter = \PHPExcel_IOFactory::createWriter($PHPExcel, "Excel2007");
        header(\'Content-Disposition: attachment;filename=\' . $file_name);
        header(\'Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\');
        header(\'Cache-Control: max-age=0\');
        $objWriter->save("php://output");  //文件通过浏览器下载
    }
//具体参数根据实际需求