Deregister/destroy session

bjblackmore

Hi,
I'm linking to a page using page.php?value=1 the page then displays info from a database based on $value.
However if I then go to page.php?value=2, $value does not seem to be re-registering as '2'! I have tried session_unregister("$value"); and session_unset(); unregister doesn't work, and unset wipes the session total, and I can't then re-register.
Can anyone help?
Cheers
bjblackmore

Anon

Variables taken from a session are given priority over variables passed via the GET method.

So your variable is being set to $value = 2 by the url parameter then immediately overwritten as $value = 1 by your session

bjblackmore

But shouldn't having

session_start();
session_destroy();

at the top of the script, remove the old session then

session_register('value');

Re-register the new value?

Cheers
Ben

Anon

No because the session_start() overwrites your $value var, session_destroy() then removes your session and session_register() registers the $value that was set from your session in the first place.

So:

To begin:
$value = null;
$HTTP_GET_VARS["value"] = null;
$HTTP_SESSION_VARS["value"] = null;

You set value, start your session and register it.
$value = 1;
$HTTP_GET_VARS["value"] = null;
$HTTP_SESSION_VARS["value"] = 1;

On the next page, you use the GET method to set your $value var

$value = 2;
$HTTP_GET_VARS["value"] = 2;
$HTTP_SESSION_VARS["value"] = 1;

... then you call session_start(), and the session overwrites the $value ...

$value = 1;
$HTTP_GET_VARS["value"] = 2;
$HTTP_SESSION_VARS["value"] = 1;

Then you destroy the session ...

$value = 1;
$HTTP_GET_VARS["value"] = 2;
$HTTP_SESSION_VARS["value"] = null;

.. And session_register('value')..

$value = 1;
$HTTP_GET_VARS["value"] = 2;
$HTTP_SESSION_VARS["value"] = 1;

Clear? :-)

bjblackmore

Erm, not really, sorry, never used $HTTP_GET_VARS or $HTTP_SESSION_VARS.
How does this work with page.php?value=1 page1.php has 3 images you click on...
image1 = page2.php?value=1
image2 = page2.php?value=2
image3 = page2.php?value=3
Then page 2 displays a form, you fill data in, and based on $value, info is inserted into the database.
I use

if (submit){
insert($value,$text1,$text2)
}

If i don't register $value it doesn't seem to get passed to the insert script.
Cheers
Ben