From 623dd1cbc74a547a1b5d47ff0772ae88cb4777ad Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Wed, 26 Apr 2023 14:21:51 +0200
Subject: [PATCH] PropertyModifierSplit: check for null values

fixes #2739
---
 library/Director/PropertyModifier/PropertyModifierSplit.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/Director/PropertyModifier/PropertyModifierSplit.php b/library/Director/PropertyModifier/PropertyModifierSplit.php
index 4a6fef6b0..3eec77d4e 100644
--- a/library/Director/PropertyModifier/PropertyModifierSplit.php
+++ b/library/Director/PropertyModifier/PropertyModifierSplit.php
@@ -33,7 +33,7 @@ public static function addSettingsFormFields(QuickForm $form)
 
     public function transform($value)
     {
-        if (! strlen(trim($value))) {
+        if ($value === null || ! strlen(trim($value))) {
             if ($this->getSetting('when_empty', 'empty_array') === 'empty_array') {
                 return array();
             } else {