From 2ef0c53c0d2da5fa87b06cf3f239a44f32889cba Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Mon, 5 Feb 2024 11:21:23 +0100
Subject: [PATCH] Fix error in user search

The error is caused by an empty radiobutton.
```
preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated
```
---
 .../files/lib/system/option/RadioButtonOptionType.class.php     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/option/RadioButtonOptionType.class.php b/wcfsetup/install/files/lib/system/option/RadioButtonOptionType.class.php
index eb88734f409..c68cf590648 100644
--- a/wcfsetup/install/files/lib/system/option/RadioButtonOptionType.class.php
+++ b/wcfsetup/install/files/lib/system/option/RadioButtonOptionType.class.php
@@ -105,7 +105,7 @@ public function getCondition(PreparedStatementConditionBuilder &$conditions, Opt
             return false;
         }
 
-        $conditions->add("option_value.userOption" . $option->optionID . " = ?", [StringUtil::trim($value)]);
+        $conditions->add("option_value.userOption" . $option->optionID . " = ?", [StringUtil::trim($value ?: '')]);
 
         return true;
     }