header('Content-Description: File Transfer');    header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");    header("Content-Disposition: attachment; filename=\"".basename($fileLocation)."\"");    header("Content-Transfer-Encoding: binary");    header("Expires: 0");    header("Pragma: public");    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");    header('Content-Length: ' . filesize($fileLocation)); //Remove    ob_clean();    flush();    readfile($fileLocation);