PHP Warning: Undefined array key "survey_reminder" in NotificationTargetCommonITILObject.php

[giovanny07]

Bug description

When GLPI processes ticket notifications, the following warning is repeatedly logged in php-errors.log:

[2026-02-18 16:25:13] glpiphplog.WARNING: *** PHP Warning (2): Undefined array key "survey_reminder"
in /usr/share/glpi/src/NotificationTargetCommonITILObject.php at line 107

Root cause

In inc/notificationtargetticket.class.php, the addEvents() method assigns the survey_reminder
key to $target->events without first checking if it already exists:

static function addEvents(NotificationTargetTicket $target) {
   $target->events['survey_reminder']
      = __('Survey Reminder', 'satisfaction');
}

Under PHP 8.2, accessing an array key that has not been initialized triggers an Undefined array key
warning. This happens when GLPI core reads $target->events in contexts where the plugin hooks
have not yet fully initialized (e.g. cron jobs, CLI execution).

Fix

Add an isset() check before assigning the key:

static function addEvents(NotificationTargetTicket $target) {
   if (!isset($target->events['survey_reminder'])) {
      $target->events['survey_reminder']
         = __('Survey Reminder', 'satisfaction');
   }
}

Environment

• Plugin version: 1.6.2
• GLPI version: 10.0.23
• PHP version: 8.2

Regards

Giovanny Rodriguez
Imagunet Colombia