Elgg / Elgg

mod/groups/actions/groups/membership/delete_invite.php

<?php
/**
 * Delete an invitation to join a group.
 *
 * @package ElggGroups
 */

$user_guid = (int) get_input('user_guid', elgg_get_logged_in_user_guid());
$group_guid = (int) get_input('group_guid');

$user = get_user($user_guid);

// invisible groups require overriding access to delete invite
$old_access = elgg_set_ignore_access(true);
$group = get_entity($group_guid);
elgg_set_ignore_access($old_access);

if (!$user && !($group instanceof \ElggGroup)) {
	return elgg_error_response();
}

// If join request made
$message = '';
if (remove_entity_relationship($group->guid, 'invited', $user->guid)) {

The property guid does not exist on false.

	$message = elgg_echo('groups:invitekilled');
}

return elgg_ok_response('', $message);