I can't see session values.

[guxin1999]

This is very simple question. But I don't know how to do it.

in my inc file:

session_start();
session_register("session");

function userinfosession($login, $pswd)
{
global $session;
$session[loginname] = $login;
$session[password] = $pswd;
$session[logged_in] = true;
}

on another php page, I tried to output the sesson values:
coding like:

session_start();
global $session;
echo "Your are $session[loginname]<br>";

But i can't see anything on the webpage.

Thanks for your help in advance.

[[deleted]]

Make sure you are sending the session-ID to the next page, either through cookies or hte URL. Check the session-section in the manual for more information.

[blackmamba]

You don't need to use session_start ( ) or global on the second page.
echo "Your are $session[loginname]<br>";
Will work fine on its own as long as the original script executed correctly.

[[deleted]]

Correction: you MUST use session_start() on EVERY page that uses sessions.

[blackmamba]

Sorry now vinnie, but I've never used session_start ( ) in my life and sessions work perfectly for me. If you don't call it it's function is still executed, if implicitly.

[[deleted]]

hmmkay...

The fact that it works for you does not mean it works for eveybody. You probably have automatic sessions enabled in your php.ini
That is the only way you can access session data without calling session_start() first.

[blackmamba]

Maybe so, but I never set anything like that explicitly. And in any books I've read it didn't use session_start ( ). This calls for a higher authority methinks 🙂
loads php.net

[blackmamba]

Right here we go, straight from the horses mouth:
The session support allows you to register arbitrary numbers of variables to be preserved across requests. When a visitor accesses your site, PHP will check automatically (if session.auto_start is set to 1) or on your request (explicitly through session_start() or implicitly through session_register()) whether a specific session id has been sent with the request. If this is the case, the prior saved environment is recreated.

Note "or implicitly through session_register()".

[Anon]

Thanks for Vincent and Donncha's help. Problem fixed!!

Thanks again.

[[deleted]]

"or implicitly through session_register()".

And note that session_register() is only used if you want to add new variables to the session, and not all scripts do that.

[blackmamba]

I use it on every page, anticipating that the user can enter on any page, and not just the one with the only session_register ( ) call.

[[deleted]]

Then you are doing exactly the opposite of what the makers of PHP meant.

You should have session_start() at the top of every page where you need the session data, so that the sessions work on all those pages.

Session_register() is ONLY for adding new variables to an existing session.
The fact that session_register() can also stat a sessions bad and should not have been implemented in PHP.

[blackmamba]

So sue me 🙂 It works doesn't it 🙂

[[deleted]]

hehe...give me your name and adres and I'll sue you for disagreeing with me! 🙂

Seriously, it works for now, but your script now depends on a 'side-effect' of a function. Side effects can be removed without warning in new versions of software, so you might one day find that your scripts nolonger work on a newer version of PHP.

[blackmamba]

I doubt it will, many functions carry implicit actions in every language, it's like never having to use the link id for MySQL connectivity. BUT, because I'm a bit too much of a perfectionist, I'm going to start using it now... :-P

[[deleted]]

They aren't really 'implicit' functions as much as 'failsafe' functions. If the programmer forgets to open the session of define which connection to use, PHP will use the default. Nothing great about that. 🙂