PHPExcel生成Excel文件---提示导出文件或者文件扩展名不一致，或导出的文件或文件扩展名无效

$data = Db::name(\'shop_cart\')->where(\'phone\',\'15555555555\')->select();
        $objPHPExcel = new PHPExcel();//实例化PHPExcel类 等同于在桌面上新建一个Excel表格
        $objSheet = $objPHPExcel->getActiveSheet();//获得当前活动sheet的操作对象
        $objSheet->setTitle(\'demo\');//给当前活动sheet设置名字
        $objSheet->setCellValue("A1","序号")->setCellValue("B1","产品编号");
        $objSheet->setCellValue("C1","产品名称")->setCellValue("D1","产品规格");
        $objSheet->setCellValue("E1","浓度")->setCellValue("F1","原价");
        $objSheet->setCellValue("G1","优惠价")->setCellValue("H1","货期");
        $objSheet->setCellValue("I1","有效期")->setCellValue("J1","批次号");
        $objSheet->setCellValue("K1","供货商")->setCellValue("L1","数量");
        $objSheet->setCellValue("M1","金额")->setCellValue("N1","备注");
        $j = 2;
        foreach($data as $key => $val){
            if($val[\'good_stock\'] > 50){
                $val[\'good_stock\'] = \'有货\';
            }else if($val[\'good_stock\'] < 50 && $val[\'good_stock\'] > 50){
                $val[\'good_stock\'] = \'缺货\';
            }else{
                $val[\'good_stock\'] = \'暂无\';
            }
            $val[\'good_indate\'] = date(\'Y-m-d\',$val[\'good_indate\']);
            $objSheet->setCellValue("A".$j,$key+1)->setCellValue("B".$j,$val[\'good_num\'])->setCellValue("C".$j,$val[\'good_name\'])->setCellValue("D".$j,$val[\'good_spe\'])->setCellValue("E".$j,$val[\'good_standard\'])->setCellValue("F".$j,$val[\'normal_price\'])->setCellValue("G".$j,$val[\'member_price\'])->setCellValue("H".$j,$val[\'good_stock\'])->setCellValue("I".$j,$val[\'good_indate\'])->setCellValue("J".$j,$val[\'good_batch\'])->setCellValue("K".$j,$val[\'company\'])->setCellValue("L".$j,$val[\'good_count\'])->setCellValue("M".$j,$val[\'good_subtotal\'])->setCellValue("N".$j,\'\');
            $j++;
        }
        ob_end_clean();//清除缓冲区,避免乱码
        header(\'Content-Type: application/vnd.ms-excel\');
        header(\'Content-Disposition: attachment;filename="links_out.xls"\');
        header(\'Cache-Control: max-age=0\');
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, \'Excel5\');
        $objWriter->save(\'php://output\');

　　之前怎么做下载下来的文件都是错误格式的。本来就对Excel文件不熟悉，不怎么用，结果就在2003跟2007之间晕了，其实写的没错，

只是没有清除缓冲区
ob_end_clean();

，所以才会提示导出文件或者文件扩展名不一致，或导出的文件或文件扩展名无效，现在Excel5是没问题了

再说Excel2007的，之前一直提示错误，header头跟文件名设置的格式都对还是提示错误，然后再最后加了一条exit;成功不提示了，

header(\'Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\');
header(\'Content-Disposition: attachment;filename="01simple.xlsx"\');
header(\'Cache-Control: max-age=0\');
exit;

　　完美输出；