Session Problem

[Anon]

Hi
I'm having problems with the following section of code and aren't sure why.

Ln1: <?php
Ln2: session_start();
Ln3: session_register( "sess_loggedin" );
Ln4: if ($sess_loggedin == "") {
Ln5: $sess_loggedin = 'false';
Ln6: }
Ln7: ?>

When the page loads the first time I get an error:
Warning: Undefined variable: sess_loggedin in includes/top.inc on line 4

and then if you hit refresh all is as it should be and no error is displayed, which is what i want it to do the first time. I could somehow set the page to refresh automatically, but I'd prefer if anyone knows what I'm doing wrong?
Thanks in advance

Simon

[[deleted]]

1) Read the manual about sessions (again if necessary)

2) session_register is only to enter a new variable into a session. You do not have to register a variable if just want to get the variable from the session.

3) The error you get is logical. The first time you use the session it's empty, so $sess_loggedin does not exist.
You use session_register() to register $sess_loggedin, but new variables are not put into the session until the script is ended, so it is not immediately available.
After checking if $sess_loggedin exists, you set it to false, so when the script end the variable $sess_loggedin is entered into the session.

So the second time you access it, the session does contain the $sess_loggedon var, and you don't get the error.

[Anon]

What's happening here is that the variable [sess_loggedin] doesn't have a value.

Look at your code. First you start the session, then you register sess_loggedin, and then test it.

When you goto a page that uses sessions, PHP will generate that variable for you, but before you actually have a session, you need to give sess_loggedin a value.

try if (session_start()) $sess_loggedin = true;

Curts