PHP Excel download

$template_path = "entrysheet.xlsm";
$filename = "職務経歴書.xlsm";
$extension = pathinfo($template_path)['extension'];
$file_size = filesize($template_path);

header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
header("Content-Length: {$file_size}");
header("Content-Disposition: attachment; filename={$filename}");
readfile($template_path);

openxmlformatsを使うのかー
なるほどねー　これでトップ側はOKかな。