# Session collision/sharing problem, need help

**URL:** <https://forum.kirupa.com/t/session-collision-sharing-problem-need-help/84269>\
**Category:** programming\
**Created:** [March 25, 2005, 9:11pm UTC](https://forum.kirupa.com/t/session-collision-sharing-problem-need-help/84269 "2005-03-25T21:11:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FlashNewby](https://avatars.discourse-cdn.com/v4/letter/f/5f8ce5/32.png) [@FlashNewby](https://forum.kirupa.com/u/FlashNewby)\
**Post date:** [March 25, 2005, 9:11pm UTC](https://forum.kirupa.com/t/session-collision-sharing-problem-need-help/84269/1 "2005-03-25T21:11:15Z")

</div>

I have a login section on one of my php pages. Once the user is logged in I set a session variable called

```php
$_SESSION['loggedIn'] = TRUE;

```

.

I use this to determine if a user can access specific areas of my site only if they are logged in which is standard. I also display a message called " **Welcome, somename"** , somename being the name of the user.

Here is the problem I’m having and how I duplicate the problem:

1. I open up two browser windows.
2. I log in for a user on one of the browser windows(Browser#1) and I don’t login on the other browser window(Browser#2).  
3)When I refresh Browser#2 I see that it displays the welcome message(**described above)** with the logged in users name that logged in from Browser #1.

[color=red] **This is not good.** 😠 [/color]

[color=black]It’s like one user knows about anothers session and can act like that user and wreak havoc. [/color]

Can someone tell me how this is possible and how to prevent this?

Any help would be appreciated.

Thanks