Online PHP editor | output for 1OBHa

<?php class UserService { public const USERNAME_ALREADY_TAKEN = 'username_already_taken'; /** @return Result<User, Error[]> */ public function registerUser(UserRegistrationData $data): Result { return $this->userRepository->find($data->username).mapOrElse( fn() => User::register($data->username, $this->passwordEncoder->encode($data->password))->andThen(function (User $user) { $this->userRepository->save($user); return $user; ), fn() => err([ new Error(sprintf('Username "%s" is already taken.', $data->username), self::USERNAME_ALREADY_TAKEN) ])) ); } }