function restoreVersion($app, $tmpl_file, $version_id)
{
db::table('templates_versions');
db::where('version_id', $version_id);
$row = db::assoc();
$rows = db::rows();
$code = stripslashes($row['version_code']);
$file = SYS_ROOT . 'tmpls/' . ADMIN_SITE . '/' . $app . '/' . $tmpl_file;
header("Content-Type: text/plain; charset=UTF-8");
files::write($file, $code);
if ($rows != 0) {
self::deleteVersion($version_id);
}
router::delQs('restore');
headers::selfQs();
}