Creating middleware in Laravel - Quick Revision & Summary

Recall & Review

beginner

What is middleware in Laravel?

Middleware is a way to filter HTTP requests entering your application. It acts like a gatekeeper that can inspect, modify, or reject requests before they reach your routes or controllers.

beginner

How do you create a new middleware in Laravel?

You use the artisan command: <code>php artisan make:middleware MiddlewareName</code>. This creates a new middleware class in the <code>app/Http/Middleware</code> directory.

beginner

What method must you implement in a Laravel middleware class?

You must implement the handle method. It receives the request and a closure to pass the request to the next middleware or controller.

intermediate

How do you register middleware so Laravel uses it?

You register middleware in app/Http/Kernel.php. You can add it to the $middleware array for global use or to $routeMiddleware for specific routes.

beginner

How do you apply middleware to a route in Laravel?

You apply middleware by adding the middleware method to a route or group, like Route::get('/home', ...)->middleware('auth');.

Which artisan command creates a new middleware in Laravel?

A php artisan make:middleware MiddlewareName

B php artisan create:middleware MiddlewareName

C php artisan new:middleware MiddlewareName

D php artisan generate:middleware MiddlewareName

The correct command is php artisan make:middleware MiddlewareName.

Where do you register route-specific middleware in Laravel?

A In <code>app/Http/Kernel.php</code> inside <code>$routeMiddleware</code>

B In <code>routes/web.php</code>

C In <code>config/middleware.php</code>

D In <code>app/Providers/AppServiceProvider.php</code>

Route-specific middleware is registered in app/Http/Kernel.php inside the $routeMiddleware array.

What does the handle method in middleware do?

A Generates views for the user

B Defines routes for the application

C Handles database migrations

D Processes the request and passes it to the next middleware or controller

The handle method processes the incoming request and decides whether to pass it along or reject it.

How do you apply middleware to a route in Laravel?

A By adding middleware in the controller constructor

B By editing the <code>config/app.php</code> file

C Using the <code>middleware</code> method on the route

D By creating a new route group without middleware

Middleware is applied to routes using the middleware method, e.g., Route::get(...)->middleware('auth').

What is the main purpose of middleware in Laravel?

A To generate HTML views

B To filter and handle HTTP requests before they reach controllers

C To create database tables

D To manage user sessions only

Middleware filters HTTP requests and can modify or block them before they reach the controller.

Explain how to create and register a middleware in Laravel and how to apply it to a route.

Think about the steps from creation to usage in routes.

Describe the role of the handle method inside a Laravel middleware class.

Focus on what happens inside the handle method.