Re: use SESSION variable?

..oO(Tim Roberts)

"Twayne" <nobody@xxxxxxxxxxxxxxxxxxx> wrote:

My actual question is: How do I get a POST variable into a session
variable so I can use it in any other page I want to use it in?
Apparently posted variables are only available in the Form page in
the file called by Action=, right? But I'd like to use it in other
places.

There are several ways to do this. A $_SESSION variable is one way, and in
many cases that's the most convenient. However, if you have a bunch of
pages with <form>s that succeed one another, it's also possible to pass
this kind of information as <input type=hidden> variables without the
overhead of a session.

Bad idea. Sessions are made for this. It's the hidden fields that cause
the real overhead on the network and the server:

* The same data has to be transferred back and forth between the server
and the client multiple times, wasting bandwidth.
* You have to re-validate the same data over and over again on every
single form submission, because even hidden fields can be manipulated.

With a session you do it all just once: you receive the data, validate
it, store it in the session and that's it. The overhead caused by the
session handler is not really an issue.

Micha
.

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