Session init

[trauma]

Hi,
Well I'm kinda ne to the session managment, so don't be mad about my silly question:

I want to forward a session's ID through
a Link: <A HREF="index2.php?<?=SID?>">click here</A>

So when I write:
...
$bla = "huibuh";
session_register("bla");
...
Everything works fine, and the SID is set.
But by writing:
...
session_start;
$bla = "huibuh";
session_register("bla");
...
the SID stays emtpy.
Why? Would the second code be the correct one?

[spacemax]

you have to start the session topmoste on the page

[mikesgt2]

With sessions the session id is automatically added as a cookie. If the user has cookies disabled then PHP will set the SID constant. So SID is only available if a cookie has not been set.