[PHP] Re: Session variables disappear (some of them only)

[karma]

You're absolutely right, but the problem is not about how the SID is passed between the scripts, it is more about why some 
variables are written in the session file while others are not, even when these variables are created within the same script at 
the same time. If the SID was not correctly passed, it wouldn't find any other variables. I also wonder why this randomly 
happens ...


I agree about the HTML/1.1 specs, I'm just a bit lazy ;)

K.


Shawn McKenzie a écrit :


http://us.php.net/manual/en/function.header.php

Note: Session ID is not passed with Location header even if 
session.use_trans_sid is enabled. It must by passed manually using SID 
constant.


-Shawn



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[PHP] Re: Session variables disappear (some of them only)

[karma]

Hi,

Ted  Fabrice, thanks for your answers.

Sessions variables are only stored in a local file. The dir permissions are ok, and I've tried to store these files in another 
dir (/var/tmp/php) just to check.


The session id is transmitted via cookies only :

session.use_cookies = 1
session.use_only_cookies = 1== I've tried with 0 and 1
session.auto_start = 0
session.cookie_lifetime = 0

I guess the Session ID is correctly transmitted because the errors doesn't occur on the first 2 scripts. First, the login page 
requires cookies to be enabled, and this step is ok. Then the user has to choose something in a menu, this step is fine too : 
some variables are set according to the user choice and the user is redirected to the 3rd script. The errors occur on this one.


Between the 2nd and 3rd scripts, variables are created from a database query : it _can't_ fail and the results are cheched : no 
possible mistake here. I use this kind of method :


- the user chooses some $id (type and value tested, ok), then :

$res=pg_query($dbr, select a, b, c, ..., from table where table_id='$id');

if(pg_num_rows($res))
{
   list($_SESSION[a], $_SESSION[b], $_SESSION[c], ...)=pg_fetch_row($res, 
0);

  pg_free_result($res);
  header(Location:my_third_script.php);
  exit();
}

Then the errors sometimes occur in my apache2/ssl_error_log (undefined index in $_SESSION variable). When I check the 
sess_12345789... file, some of the variables are missing : $_SESSION[a] and [b] are there, but not $_SESSION[c], even an 
empty one, it is just gone. That's all I know.


I would like to try to store my sessions variables in the main database, but it is quite difficult since the application is 
currently used by many people. I'll also have to upgrade a lot of scripts (a bit time consuming) to test this solution...



Regards,

C.


Fabrice VIGNALS a écrit :

Difficult to help you because there are many method of session :
- where do you store the sessions_variables : in local file, db or cookie ?
- how you transmit the session id, beetween pages(runtimes)  : cookie, 
$GET link, database ?



Did you check the availability of user cookie if you use it ?
Because if in each page of your application you define a session 
variable it's sure it will be every time here.
But the problem of session it's to transmit its ID between different 
pages, or session will be reset.
If a user don't authorised cookie you must transmit the session id by db 
storage or $Get link.


Also I don't see, a php modification during the last upgrades to explain 
that's kind of session problem.





karma [EMAIL PROTECTED] a écrit dans le message de 
news:[EMAIL PROTECTED]


Hi !

I have a very weird issue since the last Apache upgrade (- 2.2.8-r3, 
a month ago), but I'm not sure it is related (well, I'm pretty sure 
it's not).


Like many people, I've written an application that use PHP session 
variables, like $_SESSION[my_variable].


Sometimes (it doesn't happen all the time), _some_ of these variables 
are not written in the session file and they are lost after a simple 
header(Location:...); (same domain). The session file is in the right 
directory (permissions are fine), but some of my variables are missing.


The facts :
- Apache 2.2.9 + PHP 5.2.6_rc4 running on a Gentoo (up-to-date)
- all my scripts begin with session_start(). I've tried to add 
session_write_close() before every header(Location:...) call, it 
doesn't help.
- I didn't change anything in my program (it has been running just 
fine for 2 years), it just began to fail from time to time (I would 
say 10 times a day). There is no hidden unset() function : it would 
fail for everyone.
- these variables are all set correctly, and they don't have reserved 
names.
- only a few variables disappear, but they are always the same ones 
(could it depend on their position in the session file ?!?)

- the session files are very small (max 100ko)
- it seems that it doesn't depend on the browser, but IE6 and IE7 seem 
to be the most affected ones (it may be because my users mostly use 
these browsers).
- I can't reproduce this issue from my local network (any OS/browser - 
it would be too easy :)
- reverting to the previous stable Apache and/or PHP versions doesn't 
help.

- I didn't change any php.ini directive.

Any idea ?

Thanks !


PS: if you need more details, just ask. The only thing I can't do is 
pasting the code : the scripts are quite huge. 





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Re: [PHP] Re: Session variables disappear (some of them only)

[Chris]

 Then the errors sometimes occur in my apache2/ssl_error_log (undefined
 index in $_SESSION variable). When I check the sess_12345789... file,
 some of the variables are missing : $_SESSION[a] and [b] are there,
 but not $_SESSION[c], even an empty one, it is just gone. That's all I
 know.

Sounds like for those situations, the user doesn't have one of the
options set (the database is returning a null value).

Check that by matching up whatever 'a' and 'b' are with what's in the
database.

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[PHP] Re: Session variables disappear (some of them only)

[Shawn McKenzie]

karma wrote:


Hi,

Ted  Fabrice, thanks for your answers.

Sessions variables are only stored in a local file. The dir permissions 
are ok, and I've tried to store these files in another dir 
(/var/tmp/php) just to check.


The session id is transmitted via cookies only :

session.use_cookies = 1
session.use_only_cookies = 1== I've tried with 0 and 1
session.auto_start = 0
session.cookie_lifetime = 0

I guess the Session ID is correctly transmitted because the errors 
doesn't occur on the first 2 scripts. First, the login page requires 
cookies to be enabled, and this step is ok. Then the user has to choose 
something in a menu, this step is fine too : some variables are set 
according to the user choice and the user is redirected to the 3rd 
script. The errors occur on this one.


Between the 2nd and 3rd scripts, variables are created from a database 
query : it _can't_ fail and the results are cheched : no possible 
mistake here. I use this kind of method :


- the user chooses some $id (type and value tested, ok), then :

$res=pg_query($dbr, select a, b, c, ..., from table where 
table_id='$id');


if(pg_num_rows($res))
{
   list($_SESSION[a], $_SESSION[b], $_SESSION[c], 
...)=pg_fetch_row($res, 0);


  pg_free_result($res);
  header(Location:my_third_script.php);
  exit();
}

Then the errors sometimes occur in my apache2/ssl_error_log (undefined 
index in $_SESSION variable). When I check the sess_12345789... file, 
some of the variables are missing : $_SESSION[a] and [b] are there, 
but not $_SESSION[c], even an empty one, it is just gone. That's all I 
know.


I would like to try to store my sessions variables in the main database, 
but it is quite difficult since the application is currently used by 
many people. I'll also have to upgrade a lot of scripts (a bit time 
consuming) to test this solution...



Regards,

C.


Fabrice VIGNALS a écrit :

Difficult to help you because there are many method of session :
- where do you store the sessions_variables : in local file, db or 
cookie ?
- how you transmit the session id, beetween pages(runtimes)  : cookie, 
$GET link, database ?



Did you check the availability of user cookie if you use it ?
Because if in each page of your application you define a session 
variable it's sure it will be every time here.
But the problem of session it's to transmit its ID between different 
pages, or session will be reset.
If a user don't authorised cookie you must transmit the session id by 
db storage or $Get link.


Also I don't see, a php modification during the last upgrades to 
explain that's kind of session problem.





karma [EMAIL PROTECTED] a écrit dans le message de 
news:[EMAIL PROTECTED]


Hi !

I have a very weird issue since the last Apache upgrade (- 2.2.8-r3, 
a month ago), but I'm not sure it is related (well, I'm pretty sure 
it's not).


Like many people, I've written an application that use PHP session 
variables, like $_SESSION[my_variable].


Sometimes (it doesn't happen all the time), _some_ of these variables 
are not written in the session file and they are lost after a simple 
header(Location:...); (same domain). The session file is in the 
right directory (permissions are fine), but some of my variables are 
missing.


The facts :
- Apache 2.2.9 + PHP 5.2.6_rc4 running on a Gentoo (up-to-date)
- all my scripts begin with session_start(). I've tried to add 
session_write_close() before every header(Location:...) call, it 
doesn't help.
- I didn't change anything in my program (it has been running just 
fine for 2 years), it just began to fail from time to time (I would 
say 10 times a day). There is no hidden unset() function : it would 
fail for everyone.
- these variables are all set correctly, and they don't have reserved 
names.
- only a few variables disappear, but they are always the same ones 
(could it depend on their position in the session file ?!?)

- the session files are very small (max 100ko)
- it seems that it doesn't depend on the browser, but IE6 and IE7 
seem to be the most affected ones (it may be because my users mostly 
use these browsers).
- I can't reproduce this issue from my local network (any OS/browser 
- it would be too easy :)
- reverting to the previous stable Apache and/or PHP versions doesn't 
help.

- I didn't change any php.ini directive.

Any idea ?

Thanks !


PS: if you need more details, just ask. The only thing I can't do is 
pasting the code : the scripts are quite huge. 





http://us.php.net/manual/en/function.header.php

Note: Session ID is not passed with Location header even if 
session.use_trans_sid is enabled. It must by passed manually using SID 
constant.


-Shawn

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[PHP] Re: Session variables disappear (some of them only)

[Shawn McKenzie]

karma wrote:


Hi,

Ted  Fabrice, thanks for your answers.

Sessions variables are only stored in a local file. The dir permissions 
are ok, and I've tried to store these files in another dir 
(/var/tmp/php) just to check.


The session id is transmitted via cookies only :

session.use_cookies = 1
session.use_only_cookies = 1== I've tried with 0 and 1
session.auto_start = 0
session.cookie_lifetime = 0

I guess the Session ID is correctly transmitted because the errors 
doesn't occur on the first 2 scripts. First, the login page requires 
cookies to be enabled, and this step is ok. Then the user has to choose 
something in a menu, this step is fine too : some variables are set 
according to the user choice and the user is redirected to the 3rd 
script. The errors occur on this one.


Between the 2nd and 3rd scripts, variables are created from a database 
query : it _can't_ fail and the results are cheched : no possible 
mistake here. I use this kind of method :


- the user chooses some $id (type and value tested, ok), then :

$res=pg_query($dbr, select a, b, c, ..., from table where 
table_id='$id');


if(pg_num_rows($res))
{
   list($_SESSION[a], $_SESSION[b], $_SESSION[c], 
...)=pg_fetch_row($res, 0);


  pg_free_result($res);
  header(Location:my_third_script.php);
  exit();
}

Then the errors sometimes occur in my apache2/ssl_error_log (undefined 
index in $_SESSION variable). When I check the sess_12345789... file, 
some of the variables are missing : $_SESSION[a] and [b] are there, 
but not $_SESSION[c], even an empty one, it is just gone. That's all I 
know.


I would like to try to store my sessions variables in the main database, 
but it is quite difficult since the application is currently used by 
many people. I'll also have to upgrade a lot of scripts (a bit time 
consuming) to test this solution...



Regards,

C.


Fabrice VIGNALS a écrit :

Difficult to help you because there are many method of session :
- where do you store the sessions_variables : in local file, db or 
cookie ?
- how you transmit the session id, beetween pages(runtimes)  : cookie, 
$GET link, database ?



Did you check the availability of user cookie if you use it ?
Because if in each page of your application you define a session 
variable it's sure it will be every time here.
But the problem of session it's to transmit its ID between different 
pages, or session will be reset.
If a user don't authorised cookie you must transmit the session id by 
db storage or $Get link.


Also I don't see, a php modification during the last upgrades to 
explain that's kind of session problem.





karma [EMAIL PROTECTED] a écrit dans le message de 
news:[EMAIL PROTECTED]


Hi !

I have a very weird issue since the last Apache upgrade (- 2.2.8-r3, 
a month ago), but I'm not sure it is related (well, I'm pretty sure 
it's not).


Like many people, I've written an application that use PHP session 
variables, like $_SESSION[my_variable].


Sometimes (it doesn't happen all the time), _some_ of these variables 
are not written in the session file and they are lost after a simple 
header(Location:...); (same domain). The session file is in the 
right directory (permissions are fine), but some of my variables are 
missing.


The facts :
- Apache 2.2.9 + PHP 5.2.6_rc4 running on a Gentoo (up-to-date)
- all my scripts begin with session_start(). I've tried to add 
session_write_close() before every header(Location:...) call, it 
doesn't help.
- I didn't change anything in my program (it has been running just 
fine for 2 years), it just began to fail from time to time (I would 
say 10 times a day). There is no hidden unset() function : it would 
fail for everyone.
- these variables are all set correctly, and they don't have reserved 
names.
- only a few variables disappear, but they are always the same ones 
(could it depend on their position in the session file ?!?)

- the session files are very small (max 100ko)
- it seems that it doesn't depend on the browser, but IE6 and IE7 
seem to be the most affected ones (it may be because my users mostly 
use these browsers).
- I can't reproduce this issue from my local network (any OS/browser 
- it would be too easy :)
- reverting to the previous stable Apache and/or PHP versions doesn't 
help.

- I didn't change any php.ini directive.

Any idea ?

Thanks !


PS: if you need more details, just ask. The only thing I can't do is 
pasting the code : the scripts are quite huge. 






Also:

Note: HTTP/1.1 requires an absolute URI as argument to » Location: 
including the scheme, hostname and absolute path.


-Shawn

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[PHP] Re: Session variables disappear (some of them only)

[Fabrice VIGNALS]

Difficult to help you because there are many method of session :
- where do you store the sessions_variables : in local file, db or cookie ?
- how you transmit the session id, beetween pages(runtimes)  : cookie, $GET 
link, database ?



Did you check the availability of user cookie if you use it ?
Because if in each page of your application you define a session variable 
it's sure it will be every time here.
But the problem of session it's to transmit its ID between different pages, 
or session will be reset.
If a user don't authorised cookie you must transmit the session id by db 
storage or $Get link.


Also I don't see, a php modification during the last upgrades to explain 
that's kind of session problem.





karma [EMAIL PROTECTED] a écrit dans le message de 
news:[EMAIL PROTECTED]


Hi !

I have a very weird issue since the last Apache upgrade (- 2.2.8-r3, a 
month ago), but I'm not sure it is related (well, I'm pretty sure it's 
not).


Like many people, I've written an application that use PHP session 
variables, like $_SESSION[my_variable].


Sometimes (it doesn't happen all the time), _some_ of these variables are 
not written in the session file and they are lost after a simple 
header(Location:...); (same domain). The session file is in the right 
directory (permissions are fine), but some of my variables are missing.


The facts :
- Apache 2.2.9 + PHP 5.2.6_rc4 running on a Gentoo (up-to-date)
- all my scripts begin with session_start(). I've tried to add 
session_write_close() before every header(Location:...) call, it doesn't 
help.
- I didn't change anything in my program (it has been running just fine 
for 2 years), it just began to fail from time to time (I would say 10 
times a day). There is no hidden unset() function : it would fail for 
everyone.
- these variables are all set correctly, and they don't have reserved 
names.
- only a few variables disappear, but they are always the same ones (could 
it depend on their position in the session file ?!?)

- the session files are very small (max 100ko)
- it seems that it doesn't depend on the browser, but IE6 and IE7 seem to 
be the most affected ones (it may be because my users mostly use these 
browsers).
- I can't reproduce this issue from my local network (any OS/browser - it 
would be too easy :)
- reverting to the previous stable Apache and/or PHP versions doesn't 
help.

- I didn't change any php.ini directive.

Any idea ?

Thanks !


PS: if you need more details, just ask. The only thing I can't do is 
pasting the code : the scripts are quite huge. 



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[PHP] Re: Session variables disappear (some of them only)

[tedd]

At 1:48 PM +0200 7/6/08, Fabrice VIGNALS wrote:

Difficult to help you because there are many method of session :
- where do you store the sessions_variables : in local file, db or cookie ?
- how you transmit the session id, beetween 
pages(runtimes)  : cookie, $GET link, database ?



Did you check the availability of user cookie if you use it ?
Because if in each page of your application you 
define a session variable it's sure it will be 
every time here.
But the problem of session it's to transmit its 
ID between different pages, or session will be 
reset.
If a user don't authorised cookie you must 
transmit the session id by db storage or $Get 
link.


Also I don't see, a php modification during the 
last upgrades to explain that's kind of session 
problem.





karma [EMAIL PROTECTED] a écrit dans 
le message de 
news:[EMAIL PROTECTED]


Hi !

I have a very weird issue since the last Apache 
upgrade (- 2.2.8-r3, a month ago), but I'm not 
sure it is related (well, I'm pretty sure it's 
not).


Like many people, I've written an application 
that use PHP session variables, like 
$_SESSION[my_variable].


Sometimes (it doesn't happen all the time), 
_some_ of these variables are not written in 
the session file and they are lost after a 
simple header(Location:...); (same domain). 
The session file is in the right directory 
(permissions are fine), but some of my 
variables are missing.


The facts :
- Apache 2.2.9 + PHP 5.2.6_rc4 running on a Gentoo (up-to-date)
- all my scripts begin with session_start(). 
I've tried to add session_write_close() before 
every header(Location:...) call, it doesn't 
help.
- I didn't change anything in my program (it 
has been running just fine for 2 years), it 
just began to fail from time to time (I would 
say 10 times a day). There is no hidden unset() 
function : it would fail for everyone.

- these variables are all set correctly, and they don't have reserved names.
- only a few variables disappear, but they are 
always the same ones (could it depend on their 
position in the session file ?!?)

- the session files are very small (max 100ko)
- it seems that it doesn't depend on the 
browser, but IE6 and IE7 seem to be the most 
affected ones (it may be because my users 
mostly use these browsers).
- I can't reproduce this issue from my local 
network (any OS/browser - it would be too easy 
:)

- reverting to the previous stable Apache and/or PHP versions doesn't help.
- I didn't change any php.ini directive.

Any idea ?

Thanks !


If it's any comfort, I had a similar problem 
sending session variables from a script in a 
httpdocs directory to a script in a httpsdocs. 
Some of the variables made it and some didn't. It 
was very confusing. The client had php 4.3.1 
installed, if that's any help.


I never did find out what the problem was and I 
finally passed everything via a POST.


Cheers,

tedd

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