Cannot call variables $_SESSION inside controller Laravel 5

I need to call $_SESSION in laravel controller, because I placed laravel in a subfolder of another website so I need to get the session from another website. But because of I call $_SESSION inside controller, the redirect thing is not working and shown like this when I run php artisan route:list:

Anyone can help me to call $_SESSION from laravel controller? Thank you.

via Chebli Mohamed