Routing in Laravel

Routing in Laravel defines how an application responds to incoming HTTP requests. It maps URLs to specific actions such as returning a view, executing a controller method, or processing data. Laravel’s routing system is simple, expressive, and powerful.

1. Route Files in Laravel

Laravel routes are defined inside the routes/ directory:

• web.php – Routes for web applications (supports sessions, cookies, CSRF)

• api.php – Routes for APIs (stateless, prefixed with /api)

• console.php – Artisan command routes

• channels.php – Broadcasting channels

Most applications primarily use web.php and api.php.

2. Basic Routing

A basic route returns a response when a URL is accessed:

Route::get('/', function () {
    return 'Welcome to Laravel';
});

Here:

• get is the HTTP method

• / is the URL

• The function returns a response

3. Routing to Views

Routes can directly return views:

Route::get('/about', function () {
    return view('about');
});

The view file must exist in resources/views/about.blade.php.

4. Routing to Controllers

Controllers keep logic organized:

Route::get('/users', [UserController::class, 'index']);

This route calls the index method of UserController.

5. Route Parameters

Routes can accept parameters:

Route::get('/user/{id}', function ($id) {
    return "User ID: " . $id;
});

Optional parameters:

Route::get('/user/{name?}', function ($name = 'Guest') {
    return $name;
});

6. Named Routes

Named routes make URL generation easier:

Route::get('/profile', [ProfileController::class, 'show'])->name('profile');

Usage:

route('profile');

7. Route Groups

Route groups help organize routes:

Middleware Group

Route::middleware(['auth'])->group(function () {
    Route::get('/dashboard', function () {
        return 'Dashboard';
    });
});

Prefix Group

Route::prefix('admin')->group(function () {
    Route::get('/users', function () {
        return 'Admin Users';
    });
});

8. Resource Routes

Resource routes automatically create CRUD routes:

Route::resource('posts', PostController::class);

This creates routes for:

• index

• create

• store

• show

• edit

• update

• destroy

9. API Routing

API routes are defined in api.php:

Route::get('/users', function () {
    return response()->json(['users' => []]);
});

These routes are stateless and automatically prefixed with /api.

10. Route Caching

For better performance, Laravel allows route caching:

php artisan route:cache

To clear cache:

php artisan route:clear

Conclusion

Laravel routing provides a clean and flexible way to handle HTTP requests. With features like route parameters, named routes, middleware, and resource routing, Laravel makes building both web and API applications efficient and well-structured.