From 2f93873a7c16befb5d79a3e8b1658533b3e54726 Mon Sep 17 00:00:00 2001
From: Seamus Lee <seamuslee001@gmail.com>
Date: Sat, 30 Jul 2022 07:28:01 +0000
Subject: [PATCH] PHP8.1 Fix issue with passing NULL value for locale into
 string function

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

diff --git a/src/PhpWord/Style/Language.php b/src/PhpWord/Style/Language.php
index 7b2de51e07..7f3dbec767 100644
--- a/src/PhpWord/Style/Language.php
+++ b/src/PhpWord/Style/Language.php
@@ -232,7 +232,7 @@ private function validateLocale($locale)
             $locale = str_replace('_', '-', $locale);
         }
 
-        if (strlen($locale) === 2) {
+        if ($locale !== null && strlen($locale) === 2) {
             return strtolower($locale) . '-' . strtoupper($locale);
         }