question about note on php.net

Hello, I have a question--is the note from equazcion here correct? It is left unchallenged on the page but I can't see how it is correct since I am under the impression that the environment is refreshed each page load and the function or method definitions (including those for session_set_save_handler) would need to be re-established each page, not each session. I am having tremendous difficulty debugging some code I wrote and eliminating my uncertainty regarding this point would be greatly helpful. Any advice would be appreciated. Thanks!

Michael Cooper wrote:
> Hello, I have a question--is the note from equazcion here correct? It is left unchallenged on the page but I can't see how it is correct since I am under the impression that the environment is refreshed each page load and the function or method definitions (including those for session_set_save_handler) would need to be re-established each page, not each session. I am having tremendous difficulty debugging some code I wrote and eliminating my uncertainty regarding this point would be greatly helpful. Any advice would be appreciated. Thanks!

Erm, what note where on php.net?

-Stut

--
http://stut.net/

Michael Cooper wrote:
> Hello, I have a question--is the note from equazcion here correct? It
> is left unchallenged on the page but I can't see how it is correct
> since I am under the impression that the environment is refreshed
> each page load and the function or method definitions (including
> those for session_set_save_handler) would need to be re-established
> each page, not each session. I am having tremendous difficulty
> debugging some code I wrote and eliminating my uncertainty regarding
> this point would be greatly helpful. Any advice would be
> appreciated. Thanks!

Because i'm already procrastinating ...

google "site:php.net equazcion"

http://www.php.net/session_set_save_handler

wherein:

> equazcion
> 10-Mar-2007 02:44
> I know this might be obvious, but session_set_save_handler() should
> only be called once per session, or else your saved data will keep
> getting reset.
>
> If your script doesn't have a predictable start page that will only
> be called only once per session, place the session_set_save_handler
> statement in an include file, and call it via require_once().

I doubt that this is correct. The save handler that is being set is not,
in itself, a part of the session, but a function that is to be used to
act upon the session. That is, there isn't anything inherent to the
session in the function. Thus, it wouldn't be saved as *a part of* the
session. It's just a handler. It's not as if the function, itself, were
a container for the session vars.

My $.02

brian wrote:
> Michael Cooper wrote:
>> Hello, I have a question--is the note from equazcion here correct? It
>> is left unchallenged on the page but I can't see how it is correct
>> since I am under the impression that the environment is refreshed each
>> page load and the function or method definitions (including those for
>> session_set_save_handler) would need to be re-established each page,
>> not each session. I am having tremendous difficulty debugging some
>> code I wrote and eliminating my uncertainty regarding this point would
>> be greatly helpful. Any advice would be appreciated. Thanks!
>
> Because i'm already procrastinating ...
>
> google "site:php.net equazcion"
>
> http://www.php.net/session_set_save_handler
>
> wherein:
>
>> equazcion
>> 10-Mar-2007 02:44
>> I know this might be obvious, but session_set_save_handler() should
>> only be called once per session, or else your saved data will keep
>> getting reset.
>>
>> If your script doesn't have a predictable start page that will only
>> be called only once per session, place the session_set_save_handler
>> statement in an include file, and call it via require_once().
>
> I doubt that this is correct. The save handler that is being set is not,
> in itself, a part of the session, but a function that is to be used to
> act upon the session. That is, there isn't anything inherent to the
> session in the function. Thus, it wouldn't be saved as *a part of* the
> session. It's just a handler. It's not as if the function, itself, were
> a container for the session vars.

Looking at the source in head for that function[1] it would appear to
fail if a session has already been started, in which case equizcion's
comment would be wrong.

If the OP is concerned about it I suggest they try it and see what happens.

-Stut

[1] http://lxr.php.net/source/php-src/ex...session.c#1473

--
http://stut.net/

Hi

Include ob_start() function as first statement in every page. it will
maintain existing session state.

On Sat, August 11, 2007 1:54 pm, Michael Cooper wrote:
> Hello, I have a question--is the note from equazcion here correct? It
> is left unchallenged on the page but I can't see how it is correct
> since I am under the impression that the environment is refreshed each
> page load and the function or method definitions (including those for
> session_set_save_handler) would need to be re-established each page,
> not each session. I am having tremendous difficulty debugging some
> code I wrote and eliminating my uncertainty regarding this point would
> be greatly helpful. Any advice would be appreciated. Thanks!

If I could remember/find the URL to login, I could delete that bogus
note...

It's about as wrong as it gets.

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