undefined index: message_from_previous_page

[jeff5656]

I get the undefined index error for this code:

 

if ($_SESSION['message_from_previous_page']){
echo $_SESSION['message_from_previous_page']; 
$_SESSION['message_from_previous_page'] ='';
}

 

The code does not die, but I want to address it.  How do I deal with this if sometime $_SESSION['message_from_previous_page'] is undefined (like when a user first logs on and this variable is not yet assigned.  I thought that putting it inside the if statement would work to "hide" the undefined variable but nope!

[Pikachu2000]

See if it's set or not with isset().

 

if( isset($SESSION[''message_from_previous_page']) ) {