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Posted by ddolgoff on 11/24/07 20:27
On Nov 24, 3:15 pm, Jerry Stuckle <jstuck...@attglobal.net> wrote:
> ddolg...@gmail.com wrote:
> > Hello to everyone,
>
> > I have a problem of managing a session with cookies and
> > "session_set_save_handler()". I want to use php's built-in session
> > management mechanism with user-level session storage functions to
> > store session data on the client in cookies.
>
> > The simple implementation that I have works well under PHP 5.2.0 ,
> > Apache 2.0.54 and WinXP.
>
> > When I put it on Linux RHEL3 (Apache/2.0.46 (Red Hat) PHP/5.0.4) I get
> > the following error:
>
> > "Warning: Cannot modify header information - headers already sent
> > in /......./ct.php on line 37". It seems like a simple error but
> > setting a cookie with "session_set_save_handler()" becomes kind of
> > tricky.
>
> > Looks like there is something wrong with my "ob_buffering" settings.
>
> > I will appreciate if anyone has any ideas or solutions to the problem.
>
> > Here is my script:
>
> > <?php
>
> > function open($save_path, $session_name)
> > {
> > return true;
> > }
>
> > function close()
> > {
> > return true;
> > }
>
> > function read($id)
> > {
> > $sess_name = 'sess_'.$id;
> > if(isset($_COOKIE[$sess_name]))
> > {
> > return base64_decode($_COOKIE[$sess_name]);
> > }
> > else
> > {
> > return '';
> > }
> > }
>
> > function write($id, $sess_data)
> > {
> > $sess_name = 'sess_'.$id;
> > if($sess_data) setcookie($sess_name, base64_encode($sess_data), 0,
> > '/');
> > ob_end_flush();
> > return true;
> > }
>
> > function destroy($id)
> > {
> > $sess_name = 'sess_'.$id;
> > setcookie ($sess_name, '', time() - 3600);
> > return true;
> > }
>
> > function gc($maxlifetime)
> > {
> > return true;
> > }
>
> > ob_start();
> > session_set_save_handler('open', 'close', 'read', 'write', 'destroy',
> > 'gc');
> > register_shutdown_function('session_write_close');
> > session_start();
>
> > $_SESSION['probe'] = 'session data goes here';
>
> > header('Content-Type: text/html; charset=win1252');
>
> > print_r($_SESSION);
>
> > ?>
>
> > Thanks to everyone,
> > Dmitry
>
> First of all, don't use obstart(). Fix the problem which is causing
> output to be sent. As the message says - check line 37 of ct.ext.
>
> Once you get the real problem fixed, you don't need such crude bypasses
> as obstart().
>
> --
> ==================
> Remove the "x" from my email address
> Jerry Stuckle
> JDS Computer Training Corp.
> jstuck...@attglobal.net
> ==================
Jerry,
Thank you for the response. I am sorry, I did not make it clear. Line
37 is the line where setcookie() function gets called. It is inside
write() function :
if($sess_data) setcookie($sess_name, base64_encode($sess_data), 0,
'/');
That is why I cannot understand why it causes the problem.
Best regards,
Dmitry
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