On my local server on my computer I don't need to do anything and the session variables pass they're values from my main directory to my 'App' directory. However when I upload my site to my hosted server it doesn't work. How do I do this? Thanks
Sessions are sessions. Since you're not providing any code, how are we supposed to know? How are you assigning sessions? Are sessions started in the /app/ subdirectory?
Bind the session to the root of your domain and it should be available everywhere (checkout the php documentation about $_SESSION)