From: Michele Locati <michele@locati.it>
Date: Tue, 15 Mar 2022 14:28:50 +0100
Subject: [PATCH] Fix PHP 8.1 compatibility


--- a/Src/Sunra/PhpSimple/simplehtmldom_1_5/simple_html_dom.php
+++ b/Src/Sunra/PhpSimple/simplehtmldom_1_5/simple_html_dom.php
@@ -715,7 +715,7 @@ class simple_html_dom_node
             if (!empty($m[6])) {$val=$m[6];}
 
             // convert to lowercase
-            if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower($key);}
+            if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower((string) $key);}
             //elements that do NOT have the specified attribute
             if (isset($key[0]) && $key[0]==='!') {$key=substr($key, 1); $no_key=true;}