本文实例讲述了Zend Framework动作助手FlashMessenger用法。分享给大家供大家参考，具体如下：
FlashMessenger 用来处理Flash Messenger会话；FlashMessenger是一个神奇的助手。
有这么一种场景，在用户注册成功后，需要在提示页面上显示用户的名称，如果不通过get传递请求，当然你也可以通过session传递
要显示的用户名称。但是seesion的操作难免复杂，可以使用Flash Messenger快速的实现这个需求。
FlashMessenger助手允许你传递用户可能需要在下个请求看到的消息。
FlashMessenger也是使用Zend_Session_Namespace来存储消息以备将来或下个请求来读取，但是相对简单一些。
FlashMessenger简单用法：
在helper_demo1项目的基础上
新增/helper_demo1/application/controllers/UserController.php
<?php
class UserController extends Zend_Controller_Action
{
protected $_flashMessenger = null;
public function init()
{
$this->_flashMessenger =
$this->_helper->getHelper('FlashMessenger');
$this->initView();
}
public function registerAction()
{
$this->_flashMessenger->addMessage('xxxxx,Welcome!');
$this->_helper->redirector('regtips');
}
public function regtipsAction()
{
$this->view->messages = $this->_flashMessenger->getMessages();
}
}
新增/helper_demo1/application/views/scripts/user/regtips.phtml
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>test</title> </head> <body> <?php var_dump($this->messages); ?> </body> </html>
访问http://www.localzend.com/helper_demo1/public/user/register
跳转到http://www.localzend.com/helper_demo1/public/user/regtips
FlashMessager实现源码如下
<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Controller
* @subpackage Zend_Controller_Action_Helper
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Session
*/
require_once 'Zend/Session.php';
/**
* @see Zend_Controller_Action_Helper_Abstract
*/
require_once 'Zend/Controller/Action/Helper/Abstract.php';
/**
* Flash Messenger - implement session-based messages
*
* @uses Zend_Controller_Action_Helper_Abstract
* @category Zend
* @package Zend_Controller
* @subpackage Zend_Controller_Action_Helper
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: FlashMessenger.php 23775 2011-03-01 17:25:24Z ralph $
*/
class Zend_Controller_Action_Helper_FlashMessenger extends Zend_Controller_Action_Helper_Abstract implements IteratorAggregate, Countable
{
/**
* $_messages - Messages from previous request
*
* @var array
*/
static protected $_messages = array();
/**
* $_session - Zend_Session storage object
*
* @var Zend_Session
*/
static protected $_session = null;
/**
* $_messageAdded - Wether a message has been previously added
*
* @var boolean
*/
static protected $_messageAdded = false;
/**
* $_namespace - Instance namespace, default is 'default'
*
* @var string
*/
protected $_namespace = 'default';
/**
* __construct() - Instance constructor, needed to get iterators, etc
*
* @param string $namespace
* @return void
*/
public function __construct()
{
if (!self::$_session instanceof Zend_Session_Namespace) {
self::$_session = new Zend_Session_Namespace($this->getName());
foreach (self::$_session as $namespace => $messages) {
self::$_messages[$namespace] = $messages;
unset(self::$_session->{$namespace});
}
}
}
/**
* postDispatch() - runs after action is dispatched, in this
* case, it is resetting the namespace in case we have forwarded to a different
* action, Flashmessage will be 'clean' (default namespace)
*
* @return Zend_Controller_Action_Helper_FlashMessenger Provides a fluent interface
*/
public function postDispatch()
{
$this->resetNamespace();
return $this;
}
/**
* setNamespace() - change the namespace messages are added to, useful for
* per action controller messaging between requests
*
* @param string $namespace
* @return Zend_Controller_Action_Helper_FlashMessenger Provides a fluent interface
*/
public function setNamespace($namespace = 'default')
{
$this->_namespace = $namespace;
return $this;
}
/**
* resetNamespace() - reset the namespace to the default
*
* @return Zend_Controller_Action_Helper_FlashMessenger Provides a fluent interface
*/
public function resetNamespace()
{
$this->setNamespace();
return $this;
}
/**
* addMessage() - Add a message to flash message
*
* @param string $message
* @return Zend_Controller_Action_Helper_FlashMessenger Provides a fluent interface
*/
public function addMessage($message)
{
if (self::$_messageAdded === false) {
self::$_session->setExpirationHops(1, null, true);
}
if (!is_array(self::$_session->{$this->_namespace})) {
self::$_session->{$this->_namespace} = array();
}
self::$_session->{$this->_namespace}[] = $message;
return $this;
}
/**
* hasMessages() - Wether a specific namespace has messages
*
* @return boolean
*/
public function hasMessages()
{
return isset(self::$_messages[$this->_namespace]);
}
/**
* getMessages() - Get messages from a specific namespace
*
* @return array
*/
public function getMessages()
{
if ($this->hasMessages()) {
return self::$_messages[$this->_namespace];
}
return array();
}
/**
* Clear all messages from the previous request & current namespace
*
* @return boolean True if messages were cleared, false if none existed
*/
public function clearMessages()
{
if ($this->hasMessages()) {
unset(self::$_messages[$this->_namespace]);
return true;
}
return false;
}
/**
* hasCurrentMessages() - check to see if messages have been added to current
* namespace within this request
*
* @return boolean
*/
public function hasCurrentMessages()
{
return isset(self::$_session->{$this->_namespace});
}
/**
* getCurrentMessages() - get messages that have been added to the current
* namespace within this request
*
* @return array
*/
public function getCurrentMessages()
{
if ($this->hasCurrentMessages()) {
return self::$_session->{$this->_namespace};
}
return array();
}
/**
* clear messages from the current request & current namespace
*
* @return boolean
*/
public function clearCurrentMessages()
{
if ($this->hasCurrentMessages()) {
unset(self::$_session->{$this->_namespace});
return true;
}
return false;
}
/**
* getIterator() - complete the IteratorAggregate interface, for iterating
*
* @return ArrayObject
*/
public function getIterator()
{
if ($this->hasMessages()) {
return new ArrayObject($this->getMessages());
}
return new ArrayObject();
}
/**
* count() - Complete the countable interface
*
* @return int
*/
public function count()
{
if ($this->hasMessages()) {
return count($this->getMessages());
}
return 0;
}
/**
* Strategy pattern: proxy to addMessage()
*
* @param string $message
* @return void
*/
public function direct($message)
{
return $this->addMessage($message);
}
}
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