From edc73550046e0c51a6b3567203545c88250d151c Mon Sep 17 00:00:00 2001
From: mjansen <mjansen@databay.de>
Date: Thu, 5 Mar 2026 12:44:16 +0100
Subject: [PATCH] [FIX] SOAP: Fix fragile HTTPS detection which can lead to PHP
 error

---
 components/ILIAS/soap/resources/soap/server.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/ILIAS/soap/resources/soap/server.php b/components/ILIAS/soap/resources/soap/server.php
index 6adf83aa0bd8..d89edc36ad21 100644
--- a/components/ILIAS/soap/resources/soap/server.php
+++ b/components/ILIAS/soap/resources/soap/server.php
@@ -40,7 +40,7 @@
     $headerValue = $ilIliasIniFile->readVariable('https', 'auto_https_detect_header_value');
 
     $headerName = 'HTTP_' . str_replace('-', '_', strtoupper($headerName));
-    if (strcasecmp($_SERVER[$headerName], $headerValue) === 0) {
+    if (strcasecmp($_SERVER[$headerName] ?? '', $headerValue) === 0) {
         $_SERVER['HTTPS'] = 'on';
     }
 }