diff --git a/module/dept/model.php b/module/dept/model.php
index 965c77337e..ae8d912786 100644
--- a/module/dept/model.php
+++ b/module/dept/model.php
@@ -112,7 +112,7 @@ class deptModel extends model
 
         krsort($deptMenu);
         $topMenu = array_pop($deptMenu);
-        $topMenu = explode("\n", trim($topMenu));
+        $topMenu = explode("\n", trim((string)$topMenu));
         $lastMenu[] = '/';
         foreach($topMenu as $menu)
         {
diff --git a/module/user/model.php b/module/user/model.php
index 3ece501473..59e5c5c79b 100644
--- a/module/user/model.php
+++ b/module/user/model.php
@@ -424,7 +424,7 @@ class userModel extends model
                 $data[$i]->type     = 'inside';
                 $data[$i]->realname = $users->realname[$i];
                 $data[$i]->role     = $role;
-                $data[$i]->group    = in_array('ditto', $users->group[$i]) ? (isset($prev['group']) ? $prev['group'] : '') : $users->group[$i];
+                $data[$i]->group    = in_array('ditto', isset($users->group[$i]) ? $users->group[$i] : array()) ? (isset($prev['group']) ? $prev['group'] : '') : $users->group[$i];
                 $data[$i]->email    = $users->email[$i];
                 $data[$i]->gender   = $users->gender[$i];
                 $data[$i]->password = md5(trim($users->password[$i]));