<?php $event_id = get_input("event_id",0); $group_id = get_input("group_id",0); $event = get_entity($event_id); $group = get_entity($group_id); if ($group && $group->canEdit()) { add_entity_relationship($event_id, "display_on_group", $group_id ); system_message(elgg_echo('event_calendar:add_to_group:success')); } forward($event->getUrl());