From 27e7d20ff14ec981301514ad8fe53ec0feb3c4ab Mon Sep 17 00:00:00 2001
From: Relja Medic <rmedic@1worldsync.com>
Date: Tue, 14 Apr 2026 10:38:35 +0200
Subject: [PATCH] Fix undefined array key warnings breaking JSON response in
 getAllHeaders

$params['mediaType'] and $params['lang'] are optional query parameters
that may not be present in every request. In PHP 8, accessing a missing
array key emits a Warning that, with display_errors enabled, gets
prepended to the JSON response body and makes it unparseable by the
JavaScript test runner.

Fixed by using null-coalescing operators so absent params default to
null rather than triggering a warning.
---
 tester.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tester.php b/tester.php
index 8fe4ae3..1938fa8 100644
--- a/tester.php
+++ b/tester.php
@@ -78,7 +78,7 @@ function handleApiRequest(string $queryString): string
         elseif ($params['test'] === 'getAllHeaders' && isset($params['testVal']))
         {
             // $setAcceptHeaders = isset($params['setHeaders']) ? true : false;
-            $headersResult = getCustomHeaders($params['testVal'], $params['mediaType'], $params['lang']);
+            $headersResult = getCustomHeaders($params['testVal'], $params['mediaType'] ?? null, $params['lang'] ?? null);
             $resultObj = [
                 "test" => $params['test'],
                 "testVal" => $params['testVal'],