[SOLVED] What is the differents?

[Trium918]

What is the differents between the two, and

when should one use them;

$valid_user = $_SESSION['valid_user']; 

compare to:

$_SESSION['valid_user'] = $valid_user; 

[btherl]

The second says "Keep the value of valid_user"

 

The first says "Restore the value of valid_user"

 

You can think of $_SESSION['valid_user'] as a storage place, where you can put things.  But then you need to take them out again when you want to use them, even during another run of your script.  $_SESSION is the storage container, and $_SESSION['valid_user'] is one particular object in the container.

[Trium918]

Make since, Thanks!! Anymore ideas of what's

the differents?

 

[btherl]

Hmm.. I didn't proofread

 

What I meant to say was "You can take things out of $_SESSION again, even during another run of your script".

 

There's also the general rule that the thing on the left of the equals is the destination, and the thing on the right is the source (or the value).  $a = $b will set $a to a new value, but $b will be unchanged.