do I always have to do session_start()???

PoorDoggie · 06-01-2006, 02:42 PM

Do I always have to do session_start, even on pages I don't want to use any session variables? Will it still remember all the variables?

Thanks
Tom

iNod · 06-01-2006, 02:51 PM

Hello,

You only need to really use it if you plan on calling a $_SESSION['variable'] to get what the session contains.

- Steve

PoorDoggie · 06-01-2006, 02:52 PM

thanks - its not going to forget that variable if I don't use it though?

Eric · 06-01-2006, 03:38 PM

It won't forgot them, I do not believe.. unless you did a session_destory, unset, or $_SESSION = array(); to kill it. I'm not sure, however. I've not worked w/sessions much tbh.

PoorDoggie · 06-01-2006, 04:06 PM

thanks a lot - am just about to launch into a whole user script for 6yd.net. Am making a few different things for it that will run off a user database. My goodness it looks complicated though!

well... wish me luck - may be back for more help later!

Peter · 06-02-2006, 12:42 AM

it really depends on wether the user is using cookies or not. I beleive if the user has cookies turned off (and as such the url is appended with the session variable) then there will be no way for the server to know which session it is and will start a new 1.

PoorDoggie · 06-02-2006, 07:52 AM

Originally Posted by filth@flexiwebhost

it really depends on wether the user is using cookies or not. I beleive if the user has cookies turned off (and as such the url is appended with the session variable) then there will be no way for the server to know which session it is and will start a new 1.

so if I have a session variable $_SESSION['name'] - it will append my url with:
????: NamePros.com http://www.namepros.com/programming/203279-do-i-always-have-do-session_start.html

script.php?name=filth@...???

eagle12 · 06-02-2006, 10:13 AM

If you don't put it on the top of all pages, you will probably see some inconsistancies.

PoorDoggie · 06-02-2006, 11:17 AM

so you are saying, put it there anyway?

Peter · 06-02-2006, 01:28 PM

Originally Posted by PoorDoggie

so if I have a session variable $_SESSION['name'] - it will append my url with:

script.php?name=filth@...???

no it doesnt append the url with the session variables it will append it with the session name and session id so it would look something like:-

Code:

page_name.php?sid=82cf054ebb3f3a88d9e4a4c4668cd9f7

if you look in the servers temp folder you will see a file called 82cf054ebb3f3a88d9e4a4c4668cd9f7 which stores the session variables.
????: NamePros.com http://www.namepros.com/showthread.php?t=203279

All of this of course really depends on the server configuration.

PoorDoggie · 06-02-2006, 03:17 PM

oh right. So there is always a sid?

Thanks
Tom

Peter · 06-02-2006, 04:13 PM

yes there is always a sid (session ID) otherwise the server would have no way of recognising which session the person is using. The url is ussually only appended IF the user has cookies disabled but this behaviour can be changed in the php.ini file (or using ini_set()

PoorDoggie · 06-02-2006, 05:07 PM

oh right. Would there be any point doing that though? Would I ever need to use a session id?

Peter · 06-03-2006, 03:21 AM

i take it you mean changing the behaviour of the sessions. Yes 1 possible reason is if you do not want to issue cookies.

Again if the user has cookies disabled and your server doesnt have session.use_trans_sid enabled the user will not be able to traverse your site properly if it relies on sessions.

PoorDoggie · 06-03-2006, 11:34 AM

how would I get round that?

I am hosted with an external hosting company... do you think that use_trans_sid would be enabled? Is there any reason that they would turn it off?

Thanks
Tom

Peter · 06-04-2006, 01:42 AM

easiest way to find out is to create a phpinfo page:-

PHP Code:

  <?PHP

????: NamePros.com http://www.namepros.com/showthread.php?t=203279
phpinfo();

?>

the chances are it is already enabled as there is no reason for a host to disable it and would cause alot of problems if they did.

06-01-2006, 02:42 PM	THREAD STARTER #1 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	do I always have to do session_start()??? Do I always have to do session_start, even on pages I don't want to use any session variables? Will it still remember all the variables? Thanks Tom

06-01-2006, 02:51 PM	#2 (permalink)
iNod Eating Pie Join Date: Nov 2004 Location: Canada Posts: 2,272	Hello, You only need to really use it if you plan on calling a $_SESSION['variable'] to get what the session contains. - Steve __________________ I feel old.

06-04-2006, 01:42 AM	#16 (permalink)
Peter NamePros Expert Join Date: Nov 2003 Location: Scotland Posts: 5,069	easiest way to find out is to create a phpinfo page:- PHP Code: `<?PHP ????: NamePros.com http://www.namepros.com/showthread.php?t=203279 phpinfo(); ?>` the chances are it is already enabled as there is no reason for a host to disable it and would cause alot of problems if they did.

06-01-2006, 02:52 PM	THREAD STARTER #3 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	thanks - its not going to forget that variable if I don't use it though?

06-01-2006, 03:38 PM	#4 (permalink)
Eric Senior Member Join Date: Mar 2005 Posts: 4,948	It won't forgot them, I do not believe.. unless you did a session_destory, unset, or $_SESSION = array(); to kill it. I'm not sure, however. I've not worked w/sessions much tbh.

06-01-2006, 04:06 PM	THREAD STARTER #5 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	thanks a lot - am just about to launch into a whole user script for 6yd.net. Am making a few different things for it that will run off a user database. My goodness it looks complicated though! well... wish me luck - may be back for more help later!

06-02-2006, 12:42 AM	#6 (permalink)
Peter NamePros Expert Join Date: Nov 2003 Location: Scotland Posts: 5,069	it really depends on wether the user is using cookies or not. I beleive if the user has cookies turned off (and as such the url is appended with the session variable) then there will be no way for the server to know which session it is and will start a new 1.

06-02-2006, 10:13 AM	#8 (permalink)
eagle12 NamePros Member Join Date: Nov 2003 Location: Ontario, Canada Posts: 127	If you don't put it on the top of all pages, you will probably see some inconsistancies.

06-02-2006, 11:17 AM	THREAD STARTER #9 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	so you are saying, put it there anyway?

06-02-2006, 03:17 PM	THREAD STARTER #11 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	oh right. So there is always a sid? Thanks Tom

06-02-2006, 04:13 PM	#12 (permalink)
Peter NamePros Expert Join Date: Nov 2003 Location: Scotland Posts: 5,069	yes there is always a sid (session ID) otherwise the server would have no way of recognising which session the person is using. The url is ussually only appended IF the user has cookies disabled but this behaviour can be changed in the php.ini file (or using ini_set()

06-02-2006, 05:07 PM	THREAD STARTER #13 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	oh right. Would there be any point doing that though? Would I ever need to use a session id?

06-03-2006, 03:21 AM	#14 (permalink)
Peter NamePros Expert Join Date: Nov 2003 Location: Scotland Posts: 5,069	i take it you mean changing the behaviour of the sessions. Yes 1 possible reason is if you do not want to issue cookies. Again if the user has cookies disabled and your server doesnt have session.use_trans_sid enabled the user will not be able to traverse your site properly if it relies on sessions.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

06-03-2006, 11:34 AM	THREAD STARTER #15 (permalink)
PoorDoggie Soon to be RICHdoggie! Join Date: Jan 2005 Location: UK Posts: 2,408	how would I get round that? I am hosted with an external hosting company... do you think that use_trans_sid would be enabled? Is there any reason that they would turn it off? Thanks Tom