Build a JSON API#

Move your response into a controller and add a constrained identifier.

Generate the controller#

php elang make:controller PostController

Edit the controller:

namespace App\Controllers;
use Elang\Http\Response;
use Symfony\Component\HttpFoundation\JsonResponse;
final class PostController
{
    public function show(int $id): JsonResponse
    {
        return Response::json(['data' => ['id' => $id, 'title' => 'A small beginning']]);
    }
}

Register a route#

use App\Controllers\PostController;
$router->get('/api/posts/{id}', [PostController::class, 'show'], 'posts.show')
    ->where('id', '[0-9]+');

Verify the result#

Open /api/posts/42. The JSON should contain an integer ID of 42. /api/posts/nope should return 404 because it fails the route requirement.

Next step#

Hardcoded data is useful for understanding the request lifecycle. The database lesson replaces that data with records from SQLite.