From a1f87eb4195a57cc66518b9a05ae2f232555ff9e Mon Sep 17 00:00:00 2001
From: nathan <nathangray.bsc+github@gmail.com>
Date: Tue, 18 Oct 2022 11:49:36 -0600
Subject: [PATCH] Calendar: Avoid error in link_title if participants is not an
 array

---
 calendar/inc/class.calendar_bo.inc.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/calendar/inc/class.calendar_bo.inc.php b/calendar/inc/class.calendar_bo.inc.php
index a76374c516..011aa4a799 100644
--- a/calendar/inc/class.calendar_bo.inc.php
+++ b/calendar/inc/class.calendar_bo.inc.php
@@ -2014,7 +2014,7 @@ class calendar_bo
 						$extra_fields [$val] = $this->format_date($event[$val]);
 						break;
 					case 'participants':
-						foreach (array_keys($event[$val]) as $key)
+						foreach(array_keys((array)$event[$val]) as $key)
 						{
 							$extra_fields [$val] = Api\Accounts::id2name($key, 'account_fullname');
 						}