AbstractValidator.php

# app/validation/AbstractValidator.php

<?php namespace YourApp\Validation;

/**
 * Abstract implementation of a validator.
 *
 * @author	Andrea Marco Sartori
 */
abstract class AbstractValidator implements ValidatorInterface
{

	/**
	 * Validate the given input.
	 *
	 * @author	Andrea Marco Sartori
	 * @param	array	$data
	 * @return	void
	 */
	public function validate($data)
	{
		$validation = app('validator')->make($data, $this->getRules());

		if($validation->fails())
		{
			throw new Exception($validation->errors());
		}
	}

	/**
	 * Retrieve the validation rules.
	 *
	 * @author	Andrea Marco Sartori
	 * @return	array
	 */
	abstract protected function getRules();

}

Exception.php

# app/validation/Exception.php

<?php namespace YourApp\Validation;

use Illuminate\Support\MessageBag;

/**
 * Invalid input exception.
 *
 * @author	Andrea Marco Sartori
 */
class Exception extends \Exception
{

	/**
	 * @author	Andrea Marco Sartori
	 * @var		Illuminate\Support\MessageBag	$errors	Validation errors.
	 */
	protected $errors;
	
	/**
	 * Set the dependencies.
	 *
	 * @author	Andrea Marco Sartori
	 * @param	Illuminate\Support\MessageBag	$errors
	 * @return	void
	 */
	public function __construct(MessageBag $errors)
	{
		$this->errors = $errors;

		parent::__construct();
	}

	/**
	 * Retrieve the validation errors.
	 *
	 * @author	Andrea Marco Sartori
	 * @return	Illuminate\Support\MessageBag
	 */
	public function getErrors()
	{
		return $this->errors;
	}

}

global.php

# app/start/global.php

<?php

// add the following code to let Laravel know what to do
// when a validation exception is thrown

App::error(function(YourApp\Validation\Exception $exception)
{
	$errors = $exception->getErrors();

	return Redirect::back()->withInput()->withErrors($errors);
});

RegistrationController.php

# app/controllers/RegistrationController.php

<?php

use YourApp\Validation\RegistrationValidator;

class RegistrationController extends BaseController {


	/**
	 * @author	Andrea Marco Sartori
	 * @var		YourApp\Validation\RegistrationValidator	$validator	Registration input validator.
	 */
	protected $validator;
	
	/**
	 * Set the dependencies.
	 *
	 * @author	Andrea Marco Sartori
	 * @param	YourApp\Validation\RegistrationValidator	$validator
	 * @return	void
	 */
	public function __construct(RegistrationValidator $validator)
	{
		$this->validator = $validator;
	}

	/**
	 * Display a listing of the resource.
	 *
	 * @return Response
	 */
	public function index()
	{
		return View::make('registration');
	}


	/**
	 * Store a newly created resource in storage.
	 *
	 * @return Response
	 */
	public function store()
	{
		$this->validator->validate(Input::all());

		// your registration logic here
		// if validation fails, it will not be run
		// because YourApp\Validation\Exception will be thrown
	}


}

RegistrationValidator.php

# app/validation/RegistrationValidator.php

<?php namespace YourApp\Validation;

/**
 * Validate the registration input.
 *
 * @author	Andrea Marco Sartori
 */
class RegistrationValidator extends AbstractValidator
{

	/**
	 * Retrieve the validation rules.
	 *
	 * @author	Andrea Marco Sartori
	 * @return	array
	 */
	protected function getRules()
	{
		return [
			'name' => 'required|alpha|min:3',
			'email' => 'required|email|unique:users',
			'password' => 'required|min:6|confirmed',
		];
	}

}

ValidatorInterface.php

# app/validation/ValidatorInterface.php

<?php namespace YourApp\Validation;

/**
 * Interface for validators.
 *
 * @author	Andrea Marco Sartori
 */
interface ValidatorInterface
{

	/**
	 * Validate the given input.
	 *
	 * @author	Andrea Marco Sartori
	 * @param	array	$data
	 * @return	void
	 */
	public function validate($data);

}