Login and session variables

PHP
1

Hi,

I am slowly teaching myself the basics of PHP and have a quick question that I am sure will be obvious but would appreciate the feedback.
I am creating a test photo gallery application where a user has to log in to upload images.
I am using sessions to check whether the user is logged in or not. My question is:

If I have this code:

if(!isset($_SESSION['userid'])){
    // session not logged
}else{
    // session logged
}

What happens if I have 2 different applications open in my browser and both use $_SESSION[‘userid’] to check login status?
If I am logged in to 1 of the application won’t that mean that it would register me as logged in in the other application.

Please excuse my ignorance.

Thanks

2

Sessions are based on whatever page your visiting so for example if i visited both www.websitea.com and www.websiteb.com and they both used a session called userid they wouldn’t conflict as the session only gets set for that specific URL.

Hope that clears it up.

3

Brilliant - thanks

If I was testing 2 applications in sub folders of the same domain name:

www.website.com/applicationA
www.website.com/applicationB

Am I correct in thinking that this would cause a conflict?

Cheers

4

No, as long as the session is set within a different URL they won’t conflict.