\Request::getSession()在控制器构造中返回NULL

use Illuminate\Http\Request;

class YourController extends Controller
{
    protected $session;

    public function __construct(Request $request)
    {
        $this->middleware(function ($request, $next) {
            $this->session = $request->session();
            return $next($request);
        });
    }

    public function index()
    {
        // 现在可以安全地使用 $this->session
        return view('your-view');
    }
}

use Illuminate\Http\Request;

class YourController extends Controller
{
    public function index(Request $request)
    {
        $session = $request->session();
        // 现在可以安全地使用 $session
        return view('your-view');
    }
}

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;

class YourController extends Controller
{
    protected $session;

    public function __construct(Session $session)
    {
        $this->session = $session;
    }

    public function index()
    {
        // 现在可以安全地使用 $this->session
        return view('your-view');
    }
}