之前书写的一个导出图片的实例，每次翻之前的代码都直接写成日志，。
通过数据库中的查询数组后输出

  //下载方法
    public function downloadExcel()
    {
        require  'Lib/PHPExcel/Classes/PHPExcel.php';
        $data //$data为获取到的数据库中的数据
        error_reporting(E_ALL);
        //北京时区
        date_default_timezone_set('PRC');
        $objPHPExcel = new \PHPExcel();
        $objDrawing = new \PHPExcel_Worksheet_Drawing();
        /*以下是一些设置作者 标题啊之类的*/
        $objPHPExcel->getProperties()->setCreator("nkbh")
            ->setLastModifiedBy("nkbh")
            ->setTitle("nkbh")
            ->setSubject("nkbh")
            ->setDescription("详细描述")
            ->setKeywords("excel")
            ->setCategory("result file");
        /*以下就是对处理Excel里的数据*/
        $objPHPExcel->setActiveSheetIndex(0)
            //Excel的第1列，数据表头
            ->setCellValue('A' . 1, "ID")
            ->setCellValue('B' . 1, "名称")
            ->setCellValue('C' . 1, "图样")
            ->setCellValue('D' . 1, "类别")
        //循环输出表中数据
        foreach ($data as $k => $v) {
            $num = $k + 2;
            $objPHPExcel->setActiveSheetIndex(0)
                //Excel的第N列，数据格式化
                ->setCellValue('A' . $num, $v['id'])
                ->setCellValue('B' . $num, $v['name'])
//                ->setCellValue('C' . $num, $v['src'])
                ->setCellValue('D' . $num, $v['type'])
            $objDrawing->setName('Paid');
            $objDrawing->setDescription('Paid');
            $objDrawing->setPath('./Public/Uploads/' . $v['src']); //图片引入位置
            $objDrawing->setCoordinates('C'.$num); //图片添加位置
            $objDrawing->setOffsetX(210);
            $objDrawing->setRotation(25);
            $objDrawing->setHeight(36);
            $objDrawing->getShadow()->setVisible(true);
            $objDrawing->getShadow()->setDirection(45);
        }
        $objDrawing->setWorksheet($objPHPExcel->getActiveSheet()->setTitle('User'));
        $objPHPExcel->setActiveSheetIndex(0);
        header('Content-Type: application/vnd.ms-excel');
        //使用当前时间戳作为文件名
        header('Content-Disposition: attachment;filename="' . time() . '.xls"');
        header('Cache-Control: max-age=0');
        $objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
        $objWriter->save('php://output');
        exit;
    }