fix: check for an array before using array_key_exists

phil-davis · phil-davis · commit e42d6136eb9e · 2026-06-10T17:58:52.000+09:30
diff --git a/lib/ITip/Broker.php b/lib/ITip/Broker.php
@@ -648,7 +648,7 @@ protected function parseEventForAttendee(VCalendar $calendar, array $eventInfo,
             return [];
         }
 
-        $oldInstances = array_key_exists('instances', $oldEventInfo['attendees'][$attendee]) ?
+        $oldInstances = is_array($oldEventInfo['attendees'][$attendee]) && array_key_exists('instances', $oldEventInfo['attendees'][$attendee]) ?
             $oldEventInfo['attendees'][$attendee]['instances'] :
             [];
 

Original file line number	Diff line number	Diff line change
`@@ -648,7 +648,7 @@ protected function parseEventForAttendee(VCalendar $calendar, array $eventInfo,`
`648`	`648`	`return [];`
`649`	`649`	`}`
`650`	`650`
`651`		`- $oldInstances = array_key_exists('instances', $oldEventInfo['attendees'][$attendee]) ?`
	`651`	`+ $oldInstances = is_array($oldEventInfo['attendees'][$attendee]) && array_key_exists('instances', $oldEventInfo['attendees'][$attendee]) ?`
`652`	`652`	`$oldEventInfo['attendees'][$attendee]['instances'] :`
`653`	`653`	`[];`
`654`	`654`