session variables in OOP....

Hi all, I'm busy building a site which uses OOP. Several classes are used to constuct different sections of the final page to be displayed. The overall class is called class.basepage.php This is the page which outputs HTML and calls other classes to construct other parts of the page. Now I have this problem: In one of the objects I use session variables. However i get the famous error :....Cannot send session cookie - headers already sent by (output started ................" Is there a way to overcome this problem? I mean: the session variable is registered in the main part of the page after the class $this->header is called (which writes HTML)... now, I don't think I can register the sessionvariable at the top of my script since the value of the session var is determined in the main.class.......or can I? I hope you understand my problem and have some tips for me. Below is some code snippets I'm using: thx and regards Wilbert Enserink ----class.basebape.php--------------- <?php $this->header(); ?>// includes a php file which writes HTMLcode functioning as the "header" of the HTML page (i.e. navigation menu) <?php $this->main(); ?> // includes a php file (main.php) which writes the main part of the HTML data ------------------------------- ---------------main.php---------- echo "a lot of HTML depending on queries and stuff"; session_register($variable); ------------------------------------ ------------output browser---------- Warning: Cannot send session cookie - headers already sent by (output started at /opt/guide/www.designmatcher.com/HTML/wwwtest/class.basepage.php:125) in /opt/guide/www.abc.com/HTML/wwwtest/phpincludes/main/main.php on line 400 ----------------------------- ------------------------- Pas de Deux Van Mierisstraat 25 2526 NM Den Haag tel 070 4450855 fax 070 4450852 http://www.pdd.nl info@pdd.nl -------------------------