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<?PHP
/**
* example that show how to use objects as observers without
* loosing references
*
* @package Event_Dispatcher
* @subpackage Examples
* @author Stephan Schmidt <schst@php.net>
*/
/**
* load Event_Dispatcher package
*/
require_once 'Event/Dispatcher.php';
/**
* example sender
*/
class sender
{
var $_dispatcher = null;
function sender(&$dispatcher)
{
$this->_dispatcher = &$dispatcher;
}
function foo()
{
$notification = &$this->_dispatcher->post($this, 'onFoo', 'Some Info...');
echo "notification::foo is {$notification->foo}<br />";
}
}
/**
* example observer
*/
class receiver
{
var $foo;
function notify(&$notification)
{
echo "received notification<br />";
echo "receiver::foo is {$this->foo}<br />";
$notification->foo = 'bar';
}
}
$dispatcher = &Event_Dispatcher::getInstance();
$sender = &new sender($dispatcher);
$receiver = new receiver();
$receiver->foo = 42;
// make sure you are using an ampersand here!
$dispatcher->addObserver(array(&$receiver, 'notify'));
$receiver->foo = 'bar';
echo 'sender->foo()<br />';
$sender->foo();
?>
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