Write session start on 1 page or all pages?

Question

All the tutorials say to put session start. They don\'t say if that should be in all pages on the website, or some, or only 1.

And if it\'s only 1 page, does it h

Answer 1

Anything that is going to access Session variables needs to start the session.

So unless you have a php page that is non-dependent on the session than every page needs it.