How to check if my session.save_path is set

php
mysql

#1

I am making a registration and login system. Everything works, except for the $_SESSION['user']variable I am using to pass the login credentials between the Login page and the Home page. I have tried every bug fix from Stack Overflow, except one: I don’t know how to check if my session.save_path is set. How do I do that in Cloud 9?