how to switching session value base on id chosen?

[Fareast Adam]

how to change session value without need to produce a new session? I want to initialize session value on the display.php base on id on menu chosen as the following situation.

PAGE menu.php:

<a href="display.php?id=1"> menu1</a>
<a href="display.php?id=2"> menu2</a>
<a href="display.php?id=3"> menu3</a>

[Atli]

Hi.

What do you mean 'change session value'?
Can you give us an example of what you are trying to achieve?
Have you tried this yourself? Can we see the code?

[Fareast Adam]

on PAGE display.php i want to initialize the session like below;

On the top html:

[PHP]<?
global $ids;
$ids = $_GET['ids'];
?>[/PHP]

On the body:
[PHP]<?
#some sql query here...

if(isset($_SESSION['ids']))
{
#take the $_SESSION['ids'] value to execute the query
}
else
{
#take the $ids value to execute the query
}
?>[/PHP]

After slash body tag:
[PHP]<?
$_SESSION['ids'] = $ids;
?>[/PHP]

[Atli]

Ok.

What exactly is the problem?
The code you posted would work, aside from the fact that you are missing the session_start() function.

P.S.
I would recommend using "<?php" instead of just "<?". The short-tag version only works on specially configured PHP servers and will most likely cause problems if you try to use your code on other servers.

[Fareast Adam]

Ya the code i sent just to visualised what i'm wanna to achieve.. I've already placed session_start() on the top of html. What the problem is the session will never change the value! For an example if i select the menu1 from the menu.php then i clicking again to switch to others menu it can't, why? I need your help... thanks

regard Fareast Adam

[Atli]

The problem could be that after the Session variable is set, you never actually use the new ID. Look at the structure of your code, you will see that you set the $ids variable at the top, then you check whether the Session variable is set and use that if it is and finally you reset the Session variable to the new ID passed through the GET protocol.

You should be setting the Session variable at the top of the page.

<?php
session_start();
 
# Checking if the 'ids' variable was passed.
if(isset($_GET['ids'])) {
  # Set the Session variable now, rather 
  # than later as you did in your code.
  $_SESSION['ids'] = $_GET['ids'];
}
 
# Check if the Session has been set.
if(isset($_SESSION['ids'])) {
  # Do stuff here.
  # Note that now the Session contains the 'ids'
  # variable that was passed this time rather
  # than the old one your code used.
}
else {
  # No 'ids' variable was passed, nor 
  # has it ever been passed before.
}
?>
 

[Fareast Adam]

I check first...

Thank Atli for ur replys

[Fareast Adam]

Thanks Atli, finally i got the result! thanks again...

Regard,
Fareast Adam

[Atli]

Glad to hear it :)

Please don't hesitate to start a new thread if you have any more questions or problems we can help with.