sessions

[lz18]

Hi guys,

I am having problems with setting sessions, I would really appreciate if you someone can help me out.

Basically, I have first page which is an html page which contains user/password input boxes. Users must provide username/password. I used POST to send those parameters to PhP code (admin.php) which actually checks if the user exists in MySQL DB.

In my admin.php I want to start new session, so I do the following:

<?
session_start();
global $user, $passwd;

session_register('user');
session_register('password');
...
..
?>

For some reason, if I add the above line, when I press submit button on the first page, where I supply username/password, I get the following message:
Warning: Cannot send session cache limiter - headers already sent (output started at c:\inetpub\wwwroot\demo\admin.php:1) in c:\inetpub\wwwroot\demo\admin.php on line 2

Any ideas why is it happening?

Thank you!

[alego]

Are you absolutely sure that there is nothing being sent to the client prior to your session_start call?

Even so much as a blank space before the opening php tag will screw things up.