if (!empty($_GET['ref'])) $ref = secureString($_GET['ref']);
elseif (!empty($_GET['refid'])) $ref = secureString($_GET['refid']);
if (!empty($ref)) {
// Test if nickname or numeric id
if (!empty($_GET['ref'])) $ref = secureString($_GET['ref']);
elseif (!empty($_GET['refid'])) $ref = secureString($_GET['refid']);
if (!empty($ref)) {
// Test if nickname or numeric id