Help With An Error!

[Gio~Logist]

PHP Code:

Warning: Cannot modify header information - headers already sent by (output  
started at /home/urbandy/public_html/forums/cleader/index.php:3) in 
/home/urbandy/public_html/forums/admin/functions.php on line 1847 


I have no idea what that means.... And it only happens when i try to acess cleaner/index.php from two different windows. The error seems to be coming from this part of functions.php:

PHP Code:

  }
    header($cookieheader, false); // force multiple headers of same type
  } else {
    setcookie($name, $value, $expire, $cookiepath, $cookiedomain, $secure);
  }

} 


Is this even necessary? Why would this harm anything?

[filburt1]

The most common cause is having whitespace after the closing ?> in a PHP file. If that's not the problem, then you're echoing or sending other output to the browser before sending a cookie/header, which is not allowed.

[Gio~Logist]

You always could manage to make me feel stupid and still be happy about it :-D Thanks alot, if i have any problems then i'll let you know.