<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews
    </IfModule>

    # To switch to PHP 7
    AddType application/x-httpd-php56 .php

    RewriteEngine On
    RewriteCond %{HTTP_HOST} ^www.example.com [NC]
    RewriteRule ^(.*)$ http://example.com/$1 [L,R=301]

    RewriteEngine On

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)/$ /$1 [L,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
</IfModule>

use AppHttpRequestsProductRequest;

public function update(ProductRequest $request, $id)
{
  $product = Product::findOrFail($id);
  $product->update( $request->all() );

  $msgResponse = [...message...];

  return Redirect::to('/products')->with($msgResponse);
}

<?php
namespace AppHttpRequests;

use IlluminateFoundationHttpFormRequest;
use IlluminateValidationRule;

class ProductRequest extends FormRequest{

  public function authorize(){
    return true;
  }

  public function rules()
  {
    return [
      'title' => 'required|max:10|...',
      'otherfield' => ['required', Rule::in([...]),],
      ...
    ];
  }
}

/**
 * The URI to redirect to if validation fails.
 *
 * @var string
 */
protected $redirect;

/**
 * The route to redirect to if validation fails.
 *
 * @var string
 */
protected $redirectRoute;

/**
 * The controller action to redirect to if validation fails.
 *
 * @var string
 */
protected $redirectAction;

try {
    $request->validate([ /* rules */ ]);
} catch (ValidationException $e) {
    $e->redirectTo(route('route.name'));
    throw $e;
}