Cannot modify header information

eararaldor

I'm currently experimenting with integrating PHPBB3's login information across my website.

I managed to get it working last night with being able to display which user is logged in and if they were not offering them a login script.

Nothing is ever simple though as when I tried updating the website this morning, I now get the following error message:

[phpBB Debug] PHP Notice: in file /includes/session.php on line 1024: Cannot modify header information - headers already sent by (output started at /hermes/bosweb/web176/b1764/ipg.teachingictorg/index.php:7)

This is something I have never come accross before and would be interested to know what is causing it. For reference this is my current php code:

In the header (Which would need to be used on each page involved in the intergration):

<?php
define('IN_PHPBB', true);
$phpbb_root_path = './Forum/';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);
// Start session management
$user->session_begin();
$auth->acl($user->data);
$user->setup();
?>

To follow this up, later in the page I use the following script to alert the user whether they are online or need to log in:

<?php
if($user->data['is_registered'])
//if($user->data['session_logged_in'])
     //User is then logged in
{
     print $user->data['username'];
     echo'<span class="brightgreen"> is logged in</span><br />
     <a title="See You Later" href="' . append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=logout', true, $user->session_id). '">Log out</a>';
}
else
     //If user is not logged in the following form is displayed
{
     echo'<form method="post" action="Forum/ucp.php?mode=login">
		<label for="username">Username: </label> <input type="text" name="username" id="username" size="15" /><br /><br />
		<label for="password">Password: </label><input type="password" name="password" id="password" size="15" /><br /><br />
		<label for="autologin">Remember Me?: </label><input type="checkbox" name="autologin" id="autologin"  /><br /><br />
		<input type="submit" value="Log In" name="login" /><a title="Register" href="Forum/ucp.php?mode=register"> Register</a>
		<input type="hidden" name="redirect" value="index.php" />
		</form>';

}
?>

NogDog

The pertinent information we need to clarify is the two files and line numbers mentioned in the error message. The first part is telling you that /includes/session.php on line 1024 is trying to set a header, probably from a session_start() command based on the file name. That problem is because something in the page has already sent output of some kind to the browser, which means that HTTP headers can no longer be sent. In this case, the output was in the second mentioned file and line number: /hermes/bosweb/web176/b1764/ipg.teachingictorg/index.php:7 (the 7 after the colon at the very end is the line number). So you need to look at that second file and find out why/what it is outputting, and either change it so that it does not output anything*, or else rearrange the code logic so that the session_start() stuff gets done before that output gets generated.

Output can be echo/print statements, error messages, or any text (including white-space, newlines, BOM's) not within <?php...?> tags.

eararaldor

NogDog;10977880 wrote:
T The first part is telling you that /includes/session.php on line 1024 is trying to set a header, probably from a session_start() command based on the file name.

Ok well this is the code for that line 1024.

header('Set-Cookie: ' . $name_data . (($cookietime) ? '; expires=' . $expire : '') . '; path=' . $config['cookie_path'] . $domain . ((!$config['cookie_secure']) ? '' : '; secure') . '; HttpOnly', false);

NogDog;10977880 wrote:
In this case, the output was in the second mentioned file and line number: /hermes/bosweb/web176/b1764/ipg.teachingictorg/index.php:7 (the 7 after the colon at the very end is the line number).

Sorry should have clarified but the first bit of PHP I showcased was from line 7.

<?php
define('IN_PHPBB', true);
$phpbb_root_path = './Forum/';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);
// Start session management
$user->session_begin();
$auth->acl($user->data);
$user->setup();
?>

Forgive my ignorance, but I don't see how this second bit of code is setting a header?

NogDog

I'm a little confused myself now. Is this piece of code the "session.php" file or the "index.php" file (or something else)?

<?php
define('IN_PHPBB', true);
$phpbb_root_path = './Forum/';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);
// Start session management
$user->session_begin();
$auth->acl($user->data);
$user->setup();
?>

phpjunky

(I'm Eararaldor)
Great this problem is just one issues after another. After posting here last time my password no longer works and I have no idea what email address works for that account. So after all that I had to make another account. :mad:

Anyway......... to further clarify the original problem:

(output started at /hermes/bosweb/web176/b1764/ipg.teachingictorg/index.php:7)

This refers to my webpages I am trying to intergrate PHPBB3 into. At the top of every page I was planning on adding the following:

<?php
define('IN_PHPBB', true);
$phpbb_root_path = './Forum/';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);
// Start session management
$user->session_begin();
$auth->acl($user->data);
$user->setup();
?>

This is so it could connect to the PHPBB3 accounts. this is also where I am getting the header issue.

The bit in the error

/includes/session.php on line 1024

is refering too the PHPBB3 php page session.php. As we can see line 1024 adds a header using this code:

header('Set-Cookie: ' . $name_data . (($cookietime) ? '; expires=' . $expire : '') . '; path=' . $config['cookie_path'] . $domain . ((!$config['cookie_secure']) ? '' : '; secure') . '; HttpOnly', false);

I can see how this sets a header up. But I don't see how the php in my index.php is adding to the header?