Sessions CodeIgniter vs sessions PHP

[eluser]WebbHelp[/eluser]
Because I didn't understand it!

I think this is difficult, I have never used a framework before (only .net) and I don't understand how it can be so "powerful" You can do everything you want I see... but it's hard to belive.

How can I keep the information in CI session, I mean if I go to another page, wouldn't I lose information?
Of course not because it would be useless... I think this is great hehe