Laravel  Middleware

Between a request and a response, middleware acts as a link. It is a type of filtering mechanism. This lesson explains  the middleware mechanism in Laravel.

Laravel verifies  user and application authentication if the user is authenticated redirect  successfully  otherwise if not authenticate then not redirect.

*Middleware Create Command :

php artisan make:middleware <middleware-name>

<middleware-name> Here write you middleware name 

After creating middleware you will find it at  app/Http/Middleware directory.

Example :

Following the example and understand the tutorial middleware mechanism

Step 1 : We create admin middleware , let us know our middleware create command 

Php artisan make:middleware adminMiddleware.

Step 2 :after create middleware successfully , you will receive following output 

Step 3 : AdminMiddleware will be created at app/Http/Middleware. The newly created file will have the following code already created for you.

<?php

namespace App\Http\Middleware;

use Closure;

class AdminMiddleware {

   public function handle($request, Closure $next) {

      return $next($request);

   }

}

Middleware Registering : 

  The following is the code for app/Http/Kernel.php −

<?php

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;

class Kernel extends HttpKernel {

   protected $middleware = [

      \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,

      \App\Http\Middleware\EncryptCookies::class,

      \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,

      \Illuminate\Session\Middleware\StartSession::class,

      \Illuminate\View\Middleware\ShareErrorsFromSession::class,

      \App\Http\Middleware\VerifyCsrfToken::class,

   ];

   protected $routeMiddleware = [

      'auth' => \App\Http\Middleware\Authenticate::class,

      'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,

      'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,

      Admin=> \App\Http\Middleware\AdminMiddleware::class,

   ];

}

Step 4: Declare middleware 

Route::get('/', function () {

    //

})->middleware('web');

Route::middleware(['web'])->group(function () {

    //

});