static function GetUrl() { if (self::$url == null) { self::$url = COption::GetOptionString("webdav", "webdav_ext_links_url", null); $urlOld = COption::GetOptionString("webdav", "webdav_ext_links_old", null); if (self::$url == null) { self::$url = self::URL_DEF; COption::SetOptionString("webdav", "webdav_ext_links_url", self::$url); } if (self::$url != $urlOld) { COption::SetOptionString("webdav", "webdav_ext_links_old", self::$url); self::UpdateUrlRewrite(self::$url); } } return self::$url; }