From 066ea94b1169b529f8309de14f696444206e67dd Mon Sep 17 00:00:00 2001
From: Oliver Tacke <o.tacke@posteo.de>
Date: Fri, 26 Oct 2018 09:35:24 +0200
Subject: [PATCH] Fix warning in toDBArray()

Prevent accessing keys of metadata that don't exist
---
 h5p-metadata.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/h5p-metadata.class.php b/h5p-metadata.class.php
index 6884e0e..80d8eff 100644
--- a/h5p-metadata.class.php
+++ b/h5p-metadata.class.php
@@ -85,7 +85,7 @@ abstract class H5PMetadata {
         continue;
       }
 
-      if ($metadata[$key] === null || isset($metadata[$key])) {
+      if (array_key_exists($key, $metadata) && ($metadata[$key] === null || isset($metadata[$key]))) {
         $value = $metadata[$key];
         $db_field_name = strtolower(preg_replace('/(?<!^)[A-Z]/', '_$0', $key));