"Undefined index: HTTP_REFERER" with an additionnal field in ticket [1.13.0]

[Lacro59]

When you are an additional field before the save button in the ticket form, you get an error on "Undefined Index: HTTP_REFERER":

Notice: Undefined index: HTTP_REFERER in C:\wamp64\www\glpi\plugins\fields\inc\field.class.php on line 757
Notice: Undefined index: HTTP_REFERER in C:\wamp64\www\glpi\plugins\fields\inc\field.class.php on line 758

The configuration of element:

[Lacro59]

I've fixed the issue in adding an empty value when null:

if (stristr($container_obj->fields['itemtypes'], 'Ticket') !== false
   && $container_obj->fields['type'] == 'dom'
   && strpos($_SERVER['HTTP_REFERER'] ?? '', ".injector.php") === false
   && strpos($_SERVER['HTTP_REFERER'] ?? '', ".public.php") === false) {
   $html.= "<th width='13%'>$label</th>";
} else {
  $html.= "<td>$label</td>";
}

[stonebuzz]

There has been no activity on this issue for some time and therefore it is considered stale

If this issue is related to a bug, please try to reproduce on latest release (GLPI and plugin). If the problem persist, feel free to open a new issue.

If it is related to a new feature, please open a topic to discuss with community about this enhancement on suggestion website.

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