From 23498713833beb046ecc7139b60ab492d074b80a Mon Sep 17 00:00:00 2001
From: demeritcowboy <demeritcowboy@hotmail.com>
Date: Sat, 21 Nov 2020 09:21:08 -0500
Subject: [PATCH] E_NOTICE when deleting participant

---
 CRM/Event/Form/Participant.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CRM/Event/Form/Participant.php b/CRM/Event/Form/Participant.php
index 71c3204b8ce7..2ab5a13a4091 100644
--- a/CRM/Event/Form/Participant.php
+++ b/CRM/Event/Form/Participant.php
@@ -797,8 +797,8 @@ public static function formRule($values, $files, $self) {
     // $values['event_id'] is empty, then return
     // instead of proceeding further.
 
-    if ((CRM_Utils_Array::value('_qf_Participant_next', $values) == 'Delete') ||
-      (!$values['event_id'])
+    if ((($values['_qf_Participant_next'] ?? NULL) === 'Delete') ||
+      empty($values['event_id'])
     ) {
       return TRUE;
     }