lumen - LengthAwarePaginator::resolveCurrentPage() is always 1

With lumen, I have the problem that this is always `1`, also when I go to `/artikel?page=2`:

LengthAwarePaginator::resolveCurrentPage();

the complete code:

<?php namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Collection;


class ArtikelController extends Controller {

public function index()
{
$dir = '../resources/views/artikel/';

$files = array_diff(scandir($dir), array('..', '.'));

$artikel = array();

foreach($files as $k => $v)
{
$id = substr($v,0,1);
$artikel[$id]['id'] = $id;
$artikel[$id]['name'] = substr($v,0,strpos($v,'.blade.php'));
}

//Get current page form url e.g. &page=6
$currentPage = LengthAwarePaginator::resolveCurrentPage();

#dd($currentPage);

//Create a new Laravel collection from the array data
$collection = new Collection($artikel);

//Define how many items we want to be visible in each page
$perPage = 2;

//Slice the collection to get the items to display in current page
$currentPageResults = $collection->slice($currentPage * $perPage, $perPage)->sortByDesc('id')->all();

//Create our paginator and pass it to the view
$paginatedResults = new LengthAwarePaginator($currentPageResults, count($collection), $perPage);

$paginatedResults->setPath('artikel');

return view('artikel', ['artikel' => $paginatedResults]);
}

I can't find the mistake. What could be the reason? (I have also updated to `"laravel/lumen-framework": "5.1.*"`)

You can use this simple way to get your current page:

$currentPage = (int) app('request')->get('page', $default = '0');