Extend the core and show the data in every page in Laravel

Question

Following the guideline, I have

1) Create a service provider

class ViewComposerServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap the application services.
     *
     * @return void
     */
    public function boot()
    {
        view()->composer('template', function ($view) {
            $view->with('series_list', Series::all());
        });
    }

    /**
     * Register the application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}

2) Register provider

 App\Providers\ViewComposerServiceProvider::class,

3) And echo the variable at the template

{!! var_dump($series_list)  !!}

The problem is :

Route::get('/', 'HomeController@index');
Route::get('product/view/{id}', 'ProductController@view');
Route::get('product/detail/{id}', 'ProductController@detail');
Route::get('/page/contact', 'PageController@contact');

PageController and HomeController can show the $series_list, but ProductController will return error:

Undefined variable: series_list in the template

Here is the ProductController:

class ProductController extends Controller
{
    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        //$this->middleware('auth');
    }

    /**
     * Show the application dashboard.
     *
     * @return \Illuminate\Http\Response
     */
    public function view($id = 1)
    {
        return view('product/list');
    }

    public function detail($id = 1)
    {
        return view('product/detail');
    }
}

Thanks a lot for helping.

Answer 1

Another way, a bit shorter

class AppServiceProvider extends ServiceProvider
{
    // other methods

    public function boot()
    {
        $series = Series::all();
        view()->share('series_list', $series);
    }

    // other methods

}