Laravel 12 Middleware Registration Guide

Starting from Laravel 11, and continuing into Laravel 12, the traditional app/Http/Kernel.php file is no longer used for registering middleware. Instead, Laravel now handles middleware registration directly inside the bootstrap/app.php file. Here’s how you can register middleware in Laravel 12.

1. Define Your Middleware Class

Create your middleware using Artisan:

php artisan make:middleware ExampleMiddleware

This will generate the file at:
app/Http/Middleware/ExampleMiddleware.php

Example contents:

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class ExampleMiddleware
{
    public function handle(Request $request, Closure $next)
    {
        // Your custom logic here

        return $next($request);
    }
}

2. Register Middleware in bootstrap/app.php

Open bootstrap/app.php, and inside the ->withMiddleware(...) section, register your middleware.

To append your middleware to the web group, do this:

use App\Http\Middleware\EnsureTenantIsSet;


->withMiddleware(function (Middleware $middleware) {
    $middleware->encryptCookies(except: ['appearance', 'sidebar_state']);

    $middleware->web(append: [
       ExampleMiddleware::class,
        // Other middleware classes...
    ]);
})

3. Use on Specific Routes (Optional)

If you don’t want to apply it globally or to all web routes, you can assign it manually in route groups like this:

use App\Http\Middleware\ExampleMiddleware;

Route::middleware([ExampleMiddleware::class])->group(function () {
    Route::get('/dashboard', fn () => Inertia::render('Dashboard'));
});

Happy coding!!!