[PHP] Warning: Undefined Index?

List, I'm getting this error and I don't know why...can someone please help out? // Message on my web page Warning: Undefined index: mode in /var/www/html/inc/header.php on line 3 // My Script Here 1: ?php 2: // These are globals on every page 3: $mode = $_GET['mode']; 4: $si_uuid =

Re: [PHP] Warning: Undefined Index?

// Message on my web page Warning: Undefined index: mode in /var/www/html/inc/header.php on line 3 // My Script Here 1: ?php 2: // These are globals on every page 3: $mode = $_GET['mode']; 4: $si_uuid = $_GET['si_uuid']; 5: $po_uuid = $_GET['po_uuid']; PHP is warning you that 'mode' is