2.3/events_2trigger_8php_source.html

 <?php
 $object = new ElggObject();
 elgg_trigger_event('test', 'example', $object);

 // elsewhere a handler could be registered by saying
 elgg_register_event_handler('test', 'example', 'example_event_handler');
$object
$object
These two snippets demonstrates triggering an event and how to register for that event.
Definition: trigger.php:7

ElggObject

elgg_register_event_handler
elgg_register_event_handler($event, $object_type, $callback, $priority=500)
Definition: elgglib.php:550

elgg_trigger_event
elgg_trigger_event($event, $object_type, $object=null)
Definition: elgglib.php:614