Re: Cannot modify header information - headers already sent by ...

Waynn Lue wrote:

Actually, I think I fixed it by moving the style sheets below the instantiation of the facebook client, where I *think* set_user was being called. I'm still curious if it's possible to get stack trace information on errors, though. :)

You are probably looking for something like this. http://us2.php.net/manual/en/function.debug-backtrace.php

Waynn On Mon, Apr 21, 2008 at 5:39 PM, Waynn Lue <waynnlue@gmail.com> wrote:

This is for a facebook app, so it's just public function set_user($user, $session_key, $expires=null) {

    if (!$this->in_fb_canvas() && (!isset($_COOKIE[$this->api_key . '_user'])
                                   || $_COOKIE[$this->api_key .

'_user'] != $user)) {

      $cookies = array();
      $cookies['user'] = $user;
      $cookies['session_key'] = $session_key;
      $sig = self::generate_sig($cookies, $this->secret);
      foreach ($cookies as $name => $val) {
        setcookie($this->api_key . '_' . $name, $val, (int)$expires);
        $_COOKIE[$this->api_key . '_' . $name] = $val;
      }
      setcookie($this->api_key, $sig, (int)$expires);
      $_COOKIE[$this->api_key] = $sig;
    }
    $this->user = $user;
    $this->api_client->session_key = $session_key;

} But the problem is I can't tell where it's being called. Is there any way to generate a stack trace from the error logs so I know what the calling function is? On Mon, Apr 21, 2008 at 4:37 PM, Daniel Brown <parasane@gmail.com> wrote:

On Mon, Apr 21, 2008 at 11:33 AM, Waynn Lue <waynnlue@gmail.com> wrote:

I fixed this last time by looking for white space both before and after the opening and closing php tags, as a Google search had revealed. But this time, I've spent an hour running down various files and not seeing what the heck is wrong. Here's the essential setup. main.php <? require_once 'shared_style.php'; require_once 'something.php' ?>

    If something.php is setting cookies and such, it has to be above

shared_style.php. If you've already tried that with no success, post the code of something.php for us to view. -- </Daniel P. Brown> Dedicated Servers - Intel 2.4GHz w/2TB bandwidth/mo. starting at just $59.99/mo. with no contract! Dedicated servers, VPS, and hosting from $2.50/mo.

-- Jim Lucas "Some men are born to greatness, some achieve greatness, and some have greatness thrust upon them." Twelfth Night, Act II, Scene V by William Shakespeare