[SOLVED] Quick & Simple question in relation to Isset??

[mikebyrne]

In the below code I'm just wondering why we use the Isset?

 

 

<?PHP
if (isset($_SESSION['usertype']) && $_SESSION['usertype'] == 2) {
   echo "You're logged in";
} else {
   echo "You're not logged in";
}
?>

[zenag]

ReIf a variable has been unset with unset(), it will no longer be set. isset() will return FALSE if testing a variable that has been set to NULL.turns TRUE if var exists; FALSE otherwise.

[mikebyrne]

Thanks again!