pocketmine\math\Math::clamp PHP Method

    public static function clamp($value, $low, $high)
    {
        return min($high, max($low, $value));
    }

 private function clamp(Vector3 $pos)
 {
     return new Vector3(Math::clamp($pos->getFloorX(), 0, 16), Math::clamp($pos->getFloorY(), 1, 120), Math::clamp($pos->getFloorZ(), 0, 16));
 }