redirect() in base controller

Hi,
In my baseController I've got a function that check if user's role is compatible with the controller's roles.
Here is this function :

PHP Code:

function check(array $roles) {
       
        if (!isset($_SESSION['role'])) {
            die("<p>Aucun rôle défini. Vous ne pouvez accéder à cette fonctionnalité.</p>");
        }
        else {
            if (in_array($_SESSION['role'], $roles)) {
                return TRUE;
            } else {
                return redirect()->to("http://localhost/g/public/index.php/");
                die("<p>Vous ne pouvez accéder à cette fonctionnalité.</p>");
            }
        }
    } 


This function works but not the redirection. If user's role isn't in $roles redirection doesn't apply.
I read and search about using redirect function in basecontroller but wasn't able to find a solution.

Any idea ?
If you think that I'm trying to do it in a wrong way tell it to me.

Thanks