$full_path_file=ctrl_options::GetSystemOption('sentora_root') . "etc/tmp/". basename($backup);

$file_for_user=basename($backup);
header('Content-Description: File Transfer');
header("Content-type: application/octet-stream");
header('Content-Disposition: attachment; filename="'.$file_for_user.'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($full_path_file));
readfile($full_path_file);

header('Content-Length: ' . filesize($full_path_file));