In this article, we will see how to create custom middleware in laravel 9. Laravel middleware provides a convenient mechanism for inspecting and filtering HTTP requests entering your application. For example, Laravel includes a middleware that verifies the user of your application is authenticated. If the user is not authenticated, the middleware will redirect the user to your application's login screen. if the user is authenticated, the middleware will allow the request to proceed further into the application. If your projects have multiple users then we need to use middleware to provide different access or login to different users.

    So, let's see laravel 9 custom middleware,  custom middleware laravel 9, how to create middleware in laravel 9, laravel middleware example.

    In this example, I have created "roleType" middleware and I will use it simply on the route, when the route will run you must have to pass the "type" parameter, and then you can access those requests like as below demo link:

    In this step, we will create custom middleware. So, run the below command in your terminal. 

php artisan make:middleware RoleType

    After running the above command, you will find one file on the app/Http/Middleware/RoleType.php location and you have to add below code.

<?php

namespace App\Http\Middleware;

use Closure;

class RoleType
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        if ($request->type != 'admin') {
            return response()->json('You do not have access!!');
        }

        return $next($request);
    }
}

    Now, we have to register this middleware on the kernel file.

    app/Http/Kernel.php

 protected $routeMiddleware = [
        ...
        'roleType' => \App\Http\Middleware\RoleType::class,
    ];

    Now, add route and add RoleType middleware in this route. Also, you can add middleware to the group of routes. 

<?php

use Illuminate\Support\Facades\Route;
use App\Http\Controllers\UserController;
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('check/role',[UserController::class,'checkRole'])->middleware('roleType');

    In this step, we will create UserController with a checkrole function.

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class UserController extends Controller
{
    public function checkRole()
    {
        dd('checkRole');
    }
}

    Now it's time to run this example copy the below link in your URL and get output.

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