if (isset($_GET['mail_sent'])) {
$mail_sent = urlencode($_GET['mail_sent']);
}
-$sort = (int) $_GET['sort'];
-$startMessage = (int) $_GET['startMessage'];
+if (isset($_GET['sort'])) {
+ $sort = (int) $_GET['sort'];
+}
+
+if (isset($_GET['startMessage'])) {
+ $startMessage = (int) $_GET['startMessage'];
+}
if(isset($_GET['where'])) {
$where = urlencode($_GET['where']);