string event_name - the name of the event to fire
array event_data - event-specific data
extension = zero.php.ZeroExtension
<?php
// Fire a user defined event (myevent) from a php script.
$eventctxt = array('otherctxt' => 'foobar');
fire_event('myevent', $eventctxt);
// Get a value stored by the event handler for 'myevent'
$arr = zget('/request/somekey');
?>