From e037bd92e710b3d43e54f3e936388671087590cc Mon Sep 17 00:00:00 2001
From: glaszig <glaszig@gmail.com>
Date: Wed, 4 Mar 2020 18:23:51 +0100
Subject: [PATCH] prevent empty upstream server field if non is set

---
 includes/dhcp.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/includes/dhcp.php b/includes/dhcp.php
index 26625416..007a89a8 100755
--- a/includes/dhcp.php
+++ b/includes/dhcp.php
@@ -134,6 +134,7 @@ function DisplayDHCPConfig()
     $dhcpHost = empty($dhcpHost) ? [] : $dhcpHost;
     $dhcpHost = is_array($dhcpHost) ? $dhcpHost : [ $dhcpHost ];
     $upstreamServers = is_array($conf['server']) ? $conf['server'] : [ $conf['server'] ];
+    $upstreamServers = array_filter($upstreamServers);
 
     $DNS1 = '';
     $DNS2 = '';