How to start session globally?

If I print those values on the current controller, it works correctly, but when evaluating them on another controller, it no longer exists.
Other controller:

PHP Code:

public function __construct(){
 //parent::__construct();
 //establezco la zona horario par El Salvador
 date_default_timezone_set('America/El_Salvador');
 //comprobamos si el usuario está logueado
 
 $this->sesion = session();
 if($this->sesion->chequear != true)
 {
 //si no estoy logueado que me envie a index
 return redirect()->to(base_url());
 }
 
 
 } 


Any idea why that happens?

Does the above class extend BaseController? You MUST uncomment the line

PHP Code:

//parent::__construct(); 


Because if that does not run then the BaseController does not get to run this line

PHP Code:

//BaseController
$this->sesion  = \Config\Services::session(); 


In the example above you also do this

PHP Code:

$this->sesion = session(); 


Don't do that!

$this->sesion should be set up by BaseController and so is ready for use.