1.9/hooks_2trigger_8php_source.html

 <?php
 $result = elgg_trigger_plugin_hook('get_status', 'example', null, true);

 if ($result) {
     var_dump('Plugin hook says ok!');
 } else {
     var_dump('Plugin hook says no.');
 }
$result
$result
The current value for the hook is passed into the trigger function.
Definition: trigger.php:8

elgg_trigger_plugin_hook
elgg_trigger_plugin_hook($hook, $type, $params=null, $returnvalue=null)
Trigger a Plugin Hook and run all handler callbacks registered to that hook:type. ...
Definition: elgglib.php:925