public function getOperatingSystem()
	{
		switch (true) {
			case stristr(PHP_OS, 'DAR'):
				return self::OS_OSX;
			case stristr(PHP_OS, 'WIN'):
				return self::OS_WIN;
			case stristr(PHP_OS, 'LINUX'):
				return self::OS_LINUX;
			default:
				return self::OS_UNKNOWN;
		}
	}