Comparing Sessions Using ||

[tryingtolearn]

Looking for an explanation

 

I have three different user levels and I want to grant page access depending on the level.

Say the levels are:

Level A

Level B

Level C

 

On this page I only want Levels A and B to access it

 

I have it working by checking the Session value like this

if ($_SESSION['user_level'] != 'A'){

if ($_SESSION['user_level'] != 'B'){

//redirect to the restricted page notice
}
}

 

But it wouldnt work by doing any variation on one line in the if statement??

i.e.

if (!isset($_SESSION['user_level']) || ($_SESSION['user_level'] != 'A')|| ($_SESSION['user_level'] != 'B')) {
//redirect to the restricted page notice
}

it simply redirects everyone.

 

Is there a way to get it on lne line vs. nesting the if statements - just out of curiosity.. THanks

[OOP]

Hi there,

you can simply change your statement to the below:

if (!isset($_SESSION['user_level']) || ( ($_SESSION['user_level'] != 'A') AND ($_SESSION['user_level'] != 'B')) ) {
//redirect to the restricted page notice
}

 

That should work

Edited October 29, 2012 by OOP

[tryingtolearn]

Worked perfect, thanks alot for ttat

When I read it, it seems liike its saying that the A and B have to be true to redirect, I guess thats why I wasnt figuring it out.

Thanks for taking the time.

[OOP]

You are most welcome my friend, any time

[Christian F.]

What is says is that is has to be different (not equal) to both A and B, before it will redirect.

It can be a bit confusing at first, but once you wrap your head around it the NAND pattern can be quite useful.