From 952870aa59b9b8e62f1bb87ada95fc9d2aebcfa4 Mon Sep 17 00:00:00 2001
From: Satyam Valjibhai Mangroliya
 <93871216+satyammangroliya@users.noreply.github.com>
Date: Mon, 25 Aug 2025 15:45:47 +0200
Subject: [PATCH] Fix undefined set_id error on Configure tab by passing null
 if parameter is missing

---
 classes/UDFCheck/class.UDFCheckGUI.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/classes/UDFCheck/class.UDFCheckGUI.php b/classes/UDFCheck/class.UDFCheckGUI.php
index 6165e93..5dca326 100644
--- a/classes/UDFCheck/class.UDFCheckGUI.php
+++ b/classes/UDFCheck/class.UDFCheckGUI.php
@@ -44,7 +44,15 @@ public function __construct($parent_gui)
         $this->pl = ilUserDefaultsPlugin::getInstance();
         $this->ctrl->saveParameter($this, self::IDENTIFIER_CATEGORY);
         $this->ctrl->saveParameter($this, self::IDENTIFIER);
-        $this->ctrl->setParameter($this, UserSettingsGUI::IDENTIFIER, $_GET[UserSettingsGUI::IDENTIFIER]);
+        // When clicking on the "Configure" tab, the set_id may be undefined.
+        // To prevent errors, we pass a null value if the parameter is not set.
+        if (isset($_GET[UserSettingsGUI:: IDENTIFIER])) {
+            $this->ctrl->setParameter($this, UserSettingsGUI::IDENTIFIER, $_GET[UserSettingsGUI::IDENTIFIER]);
+        } 
+         else{
+            $this->ctrl->setParameter($this, UserSettingsGUI:: IDENTIFIER, null);
+        }
+ 
         $this->ctrl->saveParameter($parent_gui, UserSettingsGUI::IDENTIFIER);
     }