// Valid profile links contain a path with "/profile/" and no query parameters
if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
- if ($_SESSION["visitor_home"] != $_GET["zrl"]) {
+ if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
$_SESSION['my_url'] = $_GET['zrl'];
$_SESSION['authenticated'] = 0;
}