From 74ba6b1c97810df1a8f6398f6996a71962846e44 Mon Sep 17 00:00:00 2001
From: Seamus Lee <seamuslee001@gmail.com>
Date: Thu, 28 Apr 2022 10:58:22 +1000
Subject: [PATCH] [REF] Fix PHP8.1 issue with passing NULL to trim()

---
 CRM/Core/CodeGen/Specification.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CRM/Core/CodeGen/Specification.php b/CRM/Core/CodeGen/Specification.php
index b4f2c26f48..719db4ee52 100644
--- a/CRM/Core/CodeGen/Specification.php
+++ b/CRM/Core/CodeGen/Specification.php
@@ -706,7 +706,7 @@ class CRM_Core_CodeGen_Specification {
     $foreignKey = [
       'idColumn' => trim($foreignXML->idColumn),
       'typeColumn' => trim($foreignXML->typeColumn),
-      'key' => trim($this->value('key', $foreignXML)),
+      'key' => trim($this->value('key', $foreignXML) ?? ''),
     ];
     $dynamicForeignKeys[] = $foreignKey;
   }
-- 
2.25.1