session variable won't go away

Anon

I am writing and app. using a session 'shopping cart' and need to have it set up so that when they finish thier order they can go back and start all over again with an empty cart.

I have tried everything to get rid of the session variables with no luck.

session_destroy works fine but - i get this errror:
Warning: Cannot send session cache limiter - headers already sent (output started at /www/...)
(i do have output_buffering=on)

i tried doing session_unregister() on all the variables but they keep their values

i tried unset() on all the variables which is the wierd one - it clears them all out and works fine but once i click on any link to start the ordering again the variable come back.

i would appreciate any help... !

bakertrg

I think if you reregister the session variables after unsetting them you will no longer have this problem.

Brian

anikin

First, you get that error, cause you are outputing something before the session_start in that page. Check if you have any blank space or an empty line before the opening <? php tag.

well, how do you register the vars, and how you unregister them?

usualy, you register vars by the function session_register, or by setting it in the $_SESSION array.

to unregister, you just need to do a session_unregister (usually).

Anon

this is what my code looks like at this point:
(no spaces or lines before <?)
<?
session_start();

if ($new==1) {
unset($step);
for($cart_cnt=0;$cart_cnt<$ses_cart_items;$cart_cnt++) {
$id=$ses_cart_id[$cart_cnt];
unset($id);
echo "<p>ID: $id //";

}//end for
unset($ses_cart_items);
session_destroy();

}//end for
...
if (!$step)
$step=1;
session_register("step");
...

it's seems like i would need to start the session again but that gives me an error too..
i have tried the same code w/out the session_destroy() thinking just unset() would clear all the values.
i know i can just zap all the variables like -> $step=""; but i really would rather get a grip on how sessions are working.

Anon

$id=$ses_cart_id[$cart_cnt];
unset($id);

unset($id) will unset $id, not the content of $id...

Anon

you are so right - boy do i feel dumb!

thanks!