problem managing session with cookies and session_set_sav e_handler()

[ddolgoff]

Hello to everyone,

I have a problem of managing a session with cookies and
"session_set_sa ve_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_sa ve_handler()" becomes kind of
tricky.

Looks like there is something wrong with my "ob_bufferi ng" 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($_COOK IE[$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_sav e_handler('open ', 'close', 'read', 'write', 'destroy',
'gc');
register_shutdo wn_function('se ssion_write_clo se');
session_start() ;
$_SESSION['probe'] = 'session data goes here';

header('Content-Type: text/html; charset=win1252 ');

print_r($_SESSI ON);

?>

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_sa ve_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_sa ve_handler()" becomes kind of
tricky.

Looks like there is something wrong with my "ob_bufferi ng" 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($_COOK IE[$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_sav e_handler('open ', 'close', 'read', 'write', 'destroy',
'gc');
register_shutdo wn_function('se ssion_write_clo se');
session_start() ;
$_SESSION['probe'] = 'session data goes here';

header('Content-Type: text/html; charset=win1252 ');

print_r($_SESSI ON);

?>

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*******@attgl obal.net
=============== ===

[ddolgoff]

On Nov 24, 3:15 pm, Jerry Stuckle <jstuck...@attg lobal.netwrote:

ddolg...@gmail. com wrote:

Hello to everyone,

I have a problem of managing a session with cookies and
"session_set_sa ve_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_sa ve_handler()" becomes kind of
tricky.

Looks like there is something wrong with my "ob_bufferi ng" 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($_COOK IE[$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_sav e_handler('open ', 'close', 'read', 'write', 'destroy',
'gc');
register_shutdo wn_function('se ssion_write_clo se');
session_start() ;

$_SESSION['probe'] = 'session data goes here';

header('Content-Type: text/html; charset=win1252 ');

print_r($_SESSI ON);

?>

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...@attgl obal.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

[Jerry Stuckle]

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

On Nov 24, 3:15 pm, Jerry Stuckle <jstuck...@attg lobal.netwrote:

>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_sa ve_handler()" becomes kind of
tricky.
Looks like there is something wrong with my "ob_bufferi ng" 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($_COOK IE[$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_s ave_handler('op en', 'close', 'read', 'write', 'destroy',
'gc');
register_shut down_function(' session_write_c lose');
session_start ();
$_SESSION['probe'] = 'session data goes here';
header('Conte nt-Type: text/html; charset=win1252 ');
print_r($_SES SION);
?>
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...@attg lobal.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.
js*******@attgl obal.net
=============== ===

[Kailash Nadh]

On Nov 24, 8:08 pm, ddolg...@gmail. com wrote:

Hello to everyone,

I have a problem of managing a session with cookies and
"session_set_sa ve_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_sa ve_handler()" becomes kind of
tricky.

Looks like there is something wrong with my "ob_bufferi ng" 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($_COOK IE[$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_sav e_handler('open ', 'close', 'read', 'write', 'destroy',
'gc');
register_shutdo wn_function('se ssion_write_clo se');
session_start() ;

$_SESSION['probe'] = 'session data goes here';

header('Content-Type: text/html; charset=win1252 ');

print_r($_SESSI ON);

?>

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