Laravel/Lumen API Tutorial - Response transformers with PHP League’s Fractal

Controller.php

<?php

namespace App\Http\Controllers;

use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Http\Request;
use Laravel\Lumen\Routing\Controller as BaseController;
use League\Fractal\Manager;
use League\Fractal\Pagination\IlluminatePaginatorAdapter;
use League\Fractal\Resource\Collection;
use League\Fractal\Resource\Item;
use League\Fractal\Serializer\JsonApiSerializer;

class Controller extends BaseController
{
    /**
     * @param LengthAwarePaginator $data
     * @param $transformer
     * @return array
     */
    public function paginate($data, $transformer)
    {
        $manager = $this->getFractalManager();
        $resource = new Collection($data, $transformer, $transformer->type);
        $resource->setPaginator(new IlluminatePaginatorAdapter($data));
        return $manager->createData($resource)->toArray();
    }

    public function collection($data, $transformer)
    {
        $manager = $this->getFractalManager();
        $resource = new Collection($data, $transformer, $transformer->type);
        return $manager->createData($resource)->toArray();
    }

    public function item($data, $transformer)
    {
        $manager = $this->getFractalManager();
        $resource = new Item($data, $transformer, $transformer->type);
        return $manager->createData($resource)->toArray();
    }

    private function getFractalManager()
    {
        $request = app(Request::class);
        $manager = new Manager();
        $manager->setSerializer(new JsonApiSerializer());

        if (!empty($request->query('include'))) {
            $manager->parseIncludes($request->query('include'));
        }
        return $manager;
    }
}

https://niceprogrammer.com/2019/07/06/lumen-api-tutorial-response-transformers-with-php-leagues-fractal/