session_register

[Anon]

Hi,
when I do :
$foo = 'bar';
session_register($foo);
${$foo} = "foobar";

I can acces to $bar only in the function where I do the affectation. I dont understand why because a session variable is global (after session_register('bar') if I do session_is_register('bar') it returns TRUE every where in the source but $bar is empty).
Is somebody can help me???

AS

[mkarabulut]

You should assign the variable first and register after this.
PHP doesn't control the value of the variable if you change it in your script, PHP only stores the value of the variable before the variable has when you registered it.

[Anon]

You mean that if I change a session variable value during a script I can't ask it its value during the same script???

BTW, is there another method to get the value of a session variable that $name_of_the_variable???

AS

[mkarabulut]

I mean that if you change its value during the script, the session_registered value doesn't change simultaneously.
And another way to reach the session vars is
$HTTP_SESSION_VARS["variable_name"];