From b77b2640f8be6ab7186fd42641b2978e72faf4e5 Mon Sep 17 00:00:00 2001
From: Andrew Ruthven <andrew@etc.gen.nz>
Date: Sat, 3 Feb 2024 23:15:31 +1300
Subject: [PATCH] The displayname can be unset, test for that

---
 inc/drivers_ldap.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/drivers_ldap.php b/inc/drivers_ldap.php
index f0c34e14..cdb8e58e 100644
--- a/inc/drivers_ldap.php
+++ b/inc/drivers_ldap.php
@@ -609,7 +609,7 @@ function sync_LDAP_groups(){
         $user->fullname = $group;
       }
 
-      if ($user->displayname == "") {
+      if (! isset($user->displayname) || $user->displayname == "") {
         $user->displayname = $group;
       }