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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
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<?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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