From 0268363d0c50f9edbccccf223613d7b2db705446 Mon Sep 17 00:00:00 2001
From: Ad Schellevis <ad@opnsense.org>
Date: Wed, 5 Feb 2020 10:21:29 +0100
Subject: [PATCH] system_general. empty dnsallowoverride_exclude causes PHP
 Warning:  implode(): Invalid arguments passed ...

---
 src/www/system_general.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/www/system_general.php b/src/www/system_general.php
index e8c914bd3..4d7a8f449 100644
--- a/src/www/system_general.php
+++ b/src/www/system_general.php
@@ -151,7 +151,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
 
         if (!empty($pconfig['dnsallowoverride'])) {
             $config['system']['dnsallowoverride'] = true;
-            $config['system']['dnsallowoverride_exclude'] = implode(",", $pconfig['dnsallowoverride_exclude']);
+            $config['system']['dnsallowoverride_exclude'] = empty($pconfig['dnsallowoverride_exclude']) ? "" : implode(",", $pconfig['dnsallowoverride_exclude']);
         } elseif (isset($config['system']['dnsallowoverride'])) {
             unset($config['system']['dnsallowoverride']);
             if (isset($config['system']['dnsallowoverride_exclude'])) {