From: Michele Locati <michele@locati.it>
Date: Thu, 17 Mar 2022 09:05:19 +0100
Subject: [PATCH] Fix PHP 8.1 compatibility


--- a/src/Traits/Tag.php
+++ b/src/Traits/Tag.php
@@ -547,7 +547,7 @@ public function addClass($class)
 
         if ($class !== null && $class !== '') {
             // Prevent adding a class twice
-            $classes = explode(' ', $this->attributes['class']);
+            $classes = explode(' ', (string) $this->attributes['class']);
             if (!in_array($class, $classes, true)) {
                 $this->attributes['class'] = trim($this->attributes['class'] . ' ' . $class);
             }

--- a/src/Traits/TreeObject.php
+++ b/src/Traits/TreeObject.php
@@ -113,7 +113,7 @@ public function getChild($name)
         }
 
         // Dot notation
-        $children = explode('.', $name);
+        $children = explode('.', (string) $name);
         if (count($children) === 1) {
             return Helpers::arrayGet($this->getChildren(), $children[0]);
         }