Encoding::convertToUtf

static function convertToUtf($string)
{
	if (self::detectUtf8($string))
	{
		return $string;
	}

	$from = '';
	$to = '';
	if (!Application::isUtfMode())
	{
		$from = static::getCurrentEncoding();
		$to = 'UTF-8';
	}

	if ($from !== $to)
	{
		$string = self::convertEncoding($string, $from, $to);
	}

	return $string;
}