laravel 数组结果集 分页

$arr2  //为数组结果集
$perPage = 2;            //每页显示数量
        if ($request->has('page')) {
            $current_page = $request->input('page');
            $current_page = $current_page <= 0 ? 1 :$current_page;
        } else {
            $current_page = 1;
        }
        $item = array_slice($arr2, ($current_page-1)*$perPage, $perPage); //注释1
        $total = count($arr2);

        $paginator =new LengthAwarePaginator($item, $total, $perPage, $current_page, [
            'path' => Paginator::resolveCurrentPath(),  //注释2
            'pageName' => 'page',
        ]);
//        return response()->json(['result'=>$paginator]);