Laravel 8 and Global Session

@sr57 yes sir, with the same browser session.

The app is quite simple. This is a representation of my web.php:

Route::group(['middleware' => ['auth', 'web']], function () {
    Route::prefix('firstgroup')->group(function () {
        Route::prefix('secondgroup')->group(function () {
			// the {id} is passed to FirstController where in the construct is stored
			// in a session variable (works perfectly)
            Route::get('/{id}', [App\Http\Controllers\FirstController::class, 'index']);
            Route::prefix('thirdgroup')->group(function () {
				// when I try in the construct of SecondController to access the variable
				// stored before (I'd say one click away), the variable returned is NULL
                Route::get('/', [App\Http\Controllers\SecondController::class, 'index']);
            });
        });
    });
});

@sr57 the controllers are like these:

First Controller

namespace App\Http\Controllers;


use Illuminate\Http\Request;

class FirstController extends Controller
{
    protected $oneId;


    public function __construct(Request $request)
    {
        parent::__construct();
        $this->oneId = $request->route('id');
		session()->put('oneid', $this->oneId);
		// correct
		var_dump(session()->get('oneid'));
    }

    public function index($id)
    {
		// ... do stuff with  the $id

        return view(...);
    }
}

Second Controller

namespace App\Http\Controllers;

class GroupsController extends Controller
{
    protected $oneId;

    public function __construct()
    {
        parent::__construct();
        $this->oneId = session()->get('oneid'); 
		
		// NULL
		var_dump(session()->get('oneid'));
    }

    public function index()
    {
		// ... do stuff
        return view(...);
    }
}

@sr57 yes exactly

@Snapey thank in advance for both your and sr57 answers.

I use the session in the same way I used to with the $_SESSION and maybe is not the correct way.

However what you have written saying that "... this is a user's session, it is not global and is private to all requests by the same user..." maybe got some implications with the variable that is NULL in the SecondController?

All is happening within the same session, always logged in.

@Lowelheim as long as you know that session is for a user so CAN be shared by two controllers accessed by the same browser session