How do I grab the session ID or user id of a logged in user?

So from my existing code, I can tell that on some occasions the code grabs the users ID with

a) <?if($comments[$i]['uid'] == user_id){?> - user_id in this case is what I need
b) $_SESSION[user][id]

But the problem is that none of these work when I display them in other parts of the code.

Basically the session user ID here is the number of the registered user (when logged in) in my database

And I need to grab that number.

Perhaps I wasn't displaying a) right? I tried $user_id, 'user_id' in echo's, didn't work.

I can't believe how helpful this forum has been to me and really appreciate all the help from you guys. You're the best.

 

try
1) print $_SESSION['userid'];
2) print_r($_SESSION); //this one will print an array with every values of session

 

Whoah, that helped.

I don't know why, but echo didn't display $_SESSION['id'] - but this one did

and I found the [id] variable through the second print

Very helpful

(for google)

If you want to display all of your sessions,
print_r($_SESSION);

Thanks a lot man, I hope this helps others

 

Ok, this is weird

It was working fine, but after I logged in from another computer, it just vanished.

print_r($_SESSION); still displays what I need

but print $_SESSION['id'] doesn't work anymore

wtf? 0_o

 

I'm not sure, please check what's it value into print_r array
If not, double check things I dont know, try logging with different username on other computer, and put an error_reporting(E_ALL); line to showup errors

 

Strange.

So at first it worked through $_SESSION[id]

Then it stopped working.

But now it works through the initial $_SESSION[user][id]

I have no idea how that worked out, but at least it works

 

Wild guess - different $_SESSION-ids for admins, moderators, user etc.? Dunno if that might be a solution...

 

good point dude

 

Will try it thanks alot

 

I think that bug occured because I've logged in from another computer on the same network (IP). My website checks both IPs and Cookies.

IPs were a match, cookies weren't, so it kind of messed itself up for some odd reason. But adding [user] to the mix fixed it.

Although I didn't bother with cross-browser testing. Screw IE. If my users don't use FF, they can go die xD

 

Try storing the session ID as 'loggedin' and add a value of 1 to the field in the db, and calling the user id from where the user is logged in. GET_$userid WHERE $userloggedin = 1