From bdf3548de32dc7305de6b93a47c6adb5c99c9878 Mon Sep 17 00:00:00 2001
From: Ivan Peevski <133036+ipeevski@users.noreply.github.com>
Date: Wed, 11 Sep 2024 09:32:43 +0930
Subject: [PATCH] Fix handling null in to_xml()

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

diff --git a/src/Format.php b/src/Format.php
index 54dc4c46..4c55a430 100644
--- a/src/Format.php
+++ b/src/Format.php
@@ -215,7 +215,7 @@ public function to_xml($data = null, $structure = null, $basenode = 'xml')
                 $this->to_xml($value, $node, $key);
             } else {
                 // add single node.
-                $value = htmlspecialchars(html_entity_decode($value, ENT_QUOTES, 'UTF-8'), ENT_QUOTES, 'UTF-8');
+                $value = htmlspecialchars(html_entity_decode($value ?? '', ENT_QUOTES, 'UTF-8'), ENT_QUOTES, 'UTF-8');
 
                 $structure->addChild($key, $value);
             }