<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003, Richard Heyes |
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// +-----------------------------------------------------------------------+
// | Author: Alexey Borzov <avb@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id: Listener.php,v 1.2 2005/11/07 20:37:45 nepto Exp $
//
/**
* This class implements the Observer part of a Subject-Observer
* design pattern. It listens to the events sent by a
* HTTP_Request or HTTP_Response instance.
*
* @package HTTP_Request
* @author Alexey Borzov <avb@php.net>
* @version $Revision: 1.2 $
*/
class HTTP_Request_Listener
{
/**
* A listener's identifier
* @var string
*/
var $_id;
/**
* Constructor, sets the object's identifier
*
* @access public
*/
function HTTP_Request_Listener()
{
$this->_id = md5(uniqid('http_request_', 1));
}
/**
* Returns the listener's identifier
*
* @access public
* @return string
*/
function getId()
{
return $this->_id;
}
/**
* This method is called when Listener is notified of an event
*
* @access public
* @param object an object the listener is attached to
* @param string Event name
* @param mixed Additional data
* @abstract
*/
function update(&$subject, $event, $data = null)
{
echo "Notified of event: '$event'\n";
if (null !== $data) {
echo "Additional data: ";
var_dump($data);
}
}
}
?>
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