diff --git a/auth.php b/auth.php
index aab3985..4035e58 100644
--- a/auth.php
+++ b/auth.php
@@ -277,6 +277,11 @@ public function getUserData($user, $requireGroups = true) {
                 return false;
             }
             $row = $result->fetch(PDO::FETCH_ASSOC);
+            if ($row === false) {
+                $this->dbglog('user not found: ' . $user);
+                $result->closeCursor();
+                return false;
+            }
             $this->_phpbb_user_type = (int)$row['user_type'];
             $this->_phpbb_user_id = (int)$row['user_id'];
             $this->_phpbb_username = $row['username'];
@@ -588,7 +593,8 @@ private function use_phpbb_cache() {
      */
     private function phpbb_connect() {
         if (!$this->_phpbb_db_link) {
-            $host = strtolower(end(explode('\\', $this->_phpbb_conf['dbms'])));
+            $exploded = explode('\\', $this->_phpbb_conf['dbms']);
+            $host = strtolower(end($exploded));
             $port = '';
             $dsn = '';