problem managing session with cookies and session_set_save_handler()

[ddolgoff]

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

[Jerry Stuckle]

dd******@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.
js*******@attglobal.net
==================

[ddolgoff]

On Nov 24, 3:15 pm, Jerry Stuckle <[e-mail]:

[e-mail] 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.
[e-mail]
==================

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

[Jerry Stuckle]

dd******@gmail.com wrote:

On Nov 24, 3:15 pm, Jerry Stuckle <[e-mail]:

>[e-mail] 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.
[e-mail]
==================

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.
js*******@attglobal.net
==================

[Kailash Nadh]

On Nov 24, 8:08 pm, [e-mail] 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

I tested your script out and it worked without any errors.
Can you make sure the script does not output anything before
session_start() ?
(Empty spaces or strat characters before <?php could be the problem)

Kailash Nadh | http://kailashnadh.name