DataConverter::mb_str_pad

static function mb_str_pad($string, $padLength, $padString = " ", $padType = STR_PAD_RIGHT)
{
	if (method_exists("BitrixMainTextUtfSafeString", "pad"))
	{
		return BitrixMainTextUtfSafeString::pad($string, $padLength, $padString, $padType);
	}
	else
	{
		$newPadLength = BitrixMainTextBinaryString::getLength($string) - mb_strlen($string) + $padLength;

		return str_pad($string, $newPadLength, $padString, $padType);
	}
}