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Posted by Jerry Stuckle on 11/24/07 20:55
ddolgoff@gmail.com wrote:
> 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
>
Why are you even trying to store session data in a cookie? That defeats
the whole purpose of sessions. Just store the data in your own cookie.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================
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