Cookies, sessions -> "Warning: Cannot modify header information - headers al...

Hi.

First i wanna congratulate to all programmers of this class ;] Its just cool! 

BUT.. Can anyone help me? I dont know why im getting error message:

Code:

Warning: Cannot modify header information - headers already sent by (output started at c:\usr\krasnal\www\d-premium\login.php:1) in c:\usr\krasnal\www\d-premium\access.class.php on line 190

All the time trying to log in or log out...

First i wanna say: im not starting any output in that file...

When i changed

Code:

if( !isset( $_SESSION ) ) session_start();

to

Code:

if( isset( $_SESSION ) ) session_start();

I get no error on logging etc... And it works fine


But still i cant log out ;/
All the time it says "Output starts..."

This is code of login.php:
http://6669.pl/code.txt

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There should be some output before the session_start()

Maybe a blank in some page that you include first?

Read the login.php:
(last link in my previous post)
There is NOTHING before logging out ;/

Ok. Sorry working now.

My code was bad ^^ ;]

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