[RESOLVED] Sessions… how do UIDs work?

@saintpretz59May 16.2008

Hey All,
I’m thinking of using sessions with php. In all the tutorials, I’ve been told this:

1) Start the session, so that you can create a UID.
2) Use the session.
3) Close the session (or the user navigates away).

Nowhere can I find any info on creating UIDs or how they work!

Can anyone give me an explanation of how to use UIDs for sessions, or refer me to a tutorial that will explain it?

Thanks a bunch,
StPretz

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PHP

@mUKMay 16.2008 — #<?php

//start session

session_start();

// session ID

$x=session_id();

echo $x;

$login="mUK";

$_SESSION['USER_AUTH'] = True;

$_SESSION['USER_LOGIN'] = $login;

//destroy session

session_destroy();

?>

@auxoneMay 17.2008 — #This is a really awesome tutorial on managing users with sessions, but it requires mySQL. http://www.sitepoint.com/article/users-php-sessions-mysql

A more simplified version of the other guys post (which should work):

[code=php]session_start(); // required on every page you use $_SESSION
 
 // $_SESSION is just an associative array that is loaded on session_start();
 
 $_SESSION[uid] = 'BobtheUser'; // we can set it
 $username = $_SESSION[uid]; // or get it, if it was set before (even on another page).
 
 unset($_SESSION[uid]); // this unsets (deletes)
 
 // after an unset isset($_SESSION[uid]) would be false[/code]

You won't be able to access anything from $_SESSION until you call session_start(). Even if you just had a page to log the users out, the PHP would look like:

[code=php]
 session_start();
 unset($_SESSION['uid']); // sometimes i put single quotes. preference.
 unset($_SESSION['pwd']);[/code]

BTW, uid can be username or whatever you want.

@saintpretz59authorMay 18.2008 — #Thanks for everything so far. So, are there any pre-defined members of the $_SESSION array? Or could I, if I wanted, user a variable $_SESSION['theKrazayCoolUserIDizzle'] if I wanted to?

I think that simple answer may clear up my confusion. Thanks.

@mUKMay 18.2008 — #you can use whatever you want

@saintpretz59authorMay 18.2008 — #Okay, thanks. I read that sitepoint tutorial, which help a lot. I now understand (I think!) that the functionality of SESSIONS doesn't come from the values in the $_SESSION array. Rather, it comes from cookies (or other sources), ALLOWING the $_SESSION array to be correctly populated. At first, I thought that I needed to do a bunch of work to ensure that the PHP server would use sessions correctly. Silly me!

Thanks for helping me through this little adventure!

Regards,

SaintPretz

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