Hi people,

I'm rushing my way through PHP and learning a lot every day, but there are questions which remain unanswered. I could look up fancy definitions, but most of the times I don't get wiser from them, so I though I might ask you guys.

No1.
Can I overuse global variables?
In the way I have a settings file with nearly all variables declared as a global?

No2.
How do sessions really work? Does the browser actually get hold of any of the session variables, or is it server bound? In a simpler question; are session variables really safe?

If you guys would want to answer these questions, I would greatly appreciate it.