From 46257508243e038b7faf9f0620b603828e9e2b3c Mon Sep 17 00:00:00 2001
From: "Thomas A. Hirsch" <thomas.hirsch@vema-eg.de>
Date: Sat, 11 Feb 2023 09:47:41 +0100
Subject: [PATCH] PHP 8.1 > Deprecated: strtolower(): Passing null to parameter
 #1 ($string) of type string is deprecated

---
 lib/Doctrine/Table.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/Doctrine/Table.php b/lib/Doctrine/Table.php
index 02659b761..0842bafc8 100644
--- a/lib/Doctrine/Table.php
+++ b/lib/Doctrine/Table.php
@@ -1179,6 +1179,10 @@ public function getColumnName($fieldName)
             return $this->_columnNames[$fieldName];
         }
 
+        if (null === $fieldName) {
+            return '';
+        }
+
         return strtolower($fieldName);
     }