Member Script Header Sent?

[Mistah_Roth]

Okay I get this error for a little member script I made (its pretty much just using the same database and functions as the forums, except it allows you to log in and register etc on the site)

The error i get is:

Warning: Cannot add header information - headers already sent by (output started at /home/virtual/site34/fst/var/www/html/index3.php:23) in /home/virtual/site34/fst/var/www/html/memberadmin/functions.php on line 1611

it is above my little script thing that says Welcome Mistah Roth [login] [register]

Here is the memberadmin/functions.php area where the error is coming from.

if (defined('USE_COOKIE_WORKAROUND')) { 
    // It's been reported that there's a bug in PHP 4.2.0/4.2.1 with Apache 2 causing setcookie() to not work correctly.
    // This is the workaround. If you need to use this code, please add:
    //      define('USE_COOKIE_WORKAROUND', 1);
    // to your config.php.

if (!$value) {
  // need to do this so IE deletes the cookie correctly
  $expire = time() - 31536001;
  $value = 'deleted';
}
$cookieheader = "Set-Cookie: $name=".urlencode($value);
if ($expire) {
	$cookieheader .= '; expires='.gmdate('D, d-M-Y H:i:s', $expire).' GMT';
}
if ($cookiepath) {
  $cookieheader .= "; path=$cookiepath";
}
if ($cookiedomain) {
  $cookieheader .= "; domain=$cookiedomain";
}
if ($secure) {
  $cookieheader .= '; secure';
}
header($cookieheader, false); // force multiple headers of same type
  } else {
    setcookie($name, $value, $expire, $cookiepath, $cookiedomain, $secure);
  }

}

line 1611 is setcookie($name, $value, $expire, $cookiepath, $cookiedomain, $secure);

Im asumming it means the cookie has already been set, and so it doesn't need to set another one. Is there a way I can get it to check if its already been set? so if it has I can bypass the part making the error, or if the error isnt really important and doesn't effect the program is there a way for me to make it go away?

[Weedpacket]

This error is mentioned in the PHP manual FAQ (and scores of times in these forums).

An http response goes:

...some
...http
...headers
... followed by a blank line

Here be the content. Typically an HTML page

If your script outputs any content (including a blank line) PHP will send out all the headers that have been set up, then a blank line, and then the content. Once that blank line has been sent, it's too late to send any more headers.

So somewhere in your script you're producing output before calling header().

[Mistah_Roth]

hmmm well this is the file that actually shows the message:

<?php
error_reporting(7);

require('./global.php');

if ($bbuserinfo[userid]==0) {
  eval("dooutput(\"".gettemplate("members_welcomeguest")."\");");
} else {
  $username=$bbuserinfo['username'];
  eval("dooutput(\"".gettemplate("members_welcomeuser")."\");");
}

?>

in global it includes the function.php file.... do I have to put some kind of header initiazation somewhere as well?