From 5cbec9c6ab17e320c58a259f0cebe88bde4a7c46 Mon Sep 17 00:00:00 2001
From: Bruce Weirdan <weirdan@gmail.com>
Date: Mon, 26 Dec 2022 04:22:07 -0400
Subject: [PATCH] Backport changes from spatie/array-to-xml#204 (#206)

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

diff --git a/src/ArrayToXml.php b/src/ArrayToXml.php
index 8eba571..4a0a457 100644
--- a/src/ArrayToXml.php
+++ b/src/ArrayToXml.php
@@ -241,7 +241,7 @@ protected function isArrayAllKeySequential($value)
     protected function addAttributes(DOMElement $element, array $data)
     {
         foreach ($data as $attrKey => $attrVal) {
-            $element->setAttribute($attrKey, $attrVal);
+            $element->setAttribute($attrKey, $attrVal ?? '');
         }
     }