使用php导出xlsx文件

Question

我需要在XLS＆amp ;;中下载文件XLSX格式，我试过很多方法，但它没有用。

我的下载代码如下：

$file = "Reports.xlsx";
header('Content-Description: File Transfer');
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);

我都试过：

header('Content-type: application/octet-stream');  -  not working
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'); -  not working

对于Xls：

header("Content-Type: application/vnd.ms-excel; charset=UTF-8;");  - Working for Xls