《PHP應用：Zend Framework教程之Zend_Layout布局助手詳解》要點：
本文介紹了PHP應用：Zend Framework教程之Zend_Layout布局助手詳解，希望對您有用。如果有疑問，可以聯系我們。
PHP應用本文實例講述了Zend Framework教程之Zend_Layout布局助手.分享給大家供大家參考,具體如下：
PHP應用一、作用
PHP應用布局的作用和模版的作用類似.可以認為是把網站通用、公共的部分拿出來作為通用的頁面框架.例如一個基本的web頁面,可能頁面的頭和尾都是一樣,不一樣的可能只是內容body部分不一樣,可以把公共的部分做成模版.不僅可以提高開發效率,也為后期的維護帶來方便.
PHP應用二、使用
PHP應用這里舉一個簡單的例子.
PHP應用首先用zend studio創建一個基本的zend framework項目：layout_demo1
PHP應用結構大概如下“
PHP應用├─.settings
├─application
│? ├─configs
│? ├─controllers
│? ├─models
│? └─views
│????? ├─helpers
│????? └─scripts
│????????? ├─error
│????????? └─index
├─docs
├─library
├─public
└─tests
??? ├─application
??? │? └─controllers
??? └─library
PHP應用1.加入layout功能：
PHP應用應用配置文件/layout_demo2/application/configs/application.ini,加入如下配置
PHP應用
resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers"
resources.frontController.params.displayExceptions = 0
resources.layout.layoutPath = APPLICATION_PATH "/layouts/scripts/"
[staging : production]
PHP應用2.相應的目錄和布局模版文件 /layout_demo2/application/layouts/scripts/layout.phtml
PHP應用├─application
│? ├─configs
│? ├─controllers
│? ├─layouts
│? │? └─scripts
│? ├─models
│? └─views
PHP應用layout.html類似如下：
PHP應用
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>my app</title>
<body>
<div id="header">
header
</div>
<div id="content">
<?php echo $this -> layout() -> content;?>
</div>
<div id="footer">
header
</div>
</body>
</html>
PHP應用這里的
PHP應用
<?php echo $this -> layout() -> content;?>
PHP應用是比較重要的.表示此處為布局的內容,也就是會動態變化的地方.
PHP應用這樣,運行一下程序
PHP應用www.localzend.com/layout_demo1/public/
PHP應用生成的html源碼如下
PHP應用
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>my app</title>
<body>
<div id="header">
header
</div>
<div id="content">
<style>
a:link,
a:visited
{
color: #0398CA;
}
span#zf-name
{
color: #91BE3F;
}
div#welcome
{
color: #FFFFFF;
background-image: url(http://framework.zend.com/images/bkg_header.jpg);
width: 600px;
height: 400px;
border: 2px solid #444444;
overflow: hidden;
text-align: center;
}
div#more-information
{
background-image: url(http://framework.zend.com/images/bkg_body-bottom.gif);
height: 100%;
}
</style>
<div id="welcome">
<h1>Welcome to the <span id="zf-name">Zend Framework!</span></h1>
<h3>This is your project's main page</h3>
<div id="more-information">
<p><img src="http://framework.zend.com/images/PoweredBy_ZF_4LightBG.png" /></p>
<p>
Helpful Links: <br />
<a >Zend Framework Website</a> |
<a >Zend Framework Manual</a>
</p>
</div>
</div> </div>
<div id="footer">
header
</div>
</body>
</html>
PHP應用中間部分就是/layout_demo1/application/views/scripts/index/index.phtml的內容.
PHP應用注入：可以通過zf的命令工具自動生成layout的配置和文件.
PHP應用命令如下:
PHP應用
zf enable layout
PHP應用可以參考命令行章節
PHP應用三、配置
PHP應用1.自定義存放位置和名稱可以通過application.ini配置文件配置布局文件的存放位置以及布局文件的名稱,例如:
PHP應用
resources.layout.layoutPath = APPLICATION_PATH "/mylayouts/scripts"
resources.layout.layout = "mylayout"
PHP應用2.在action中使用layout對象
PHP應用可以通過
PHP應用
$layout = $this->_helper->layout();
PHP應用或者
PHP應用
$helper = $this->_helper->getHelper('Layout');
$layout = $helper->getLayoutInstance();
PHP應用獲取布局對象.
PHP應用可以通過如下方式禁用當前action使用布局模式
PHP應用
$layout->disableLayout();
PHP應用可以通過
PHP應用
$layout->setLayout('other');
PHP應用來設置使用另一個布局文件
PHP應用可以通過來傳遞賦值
PHP應用
$layout->assign('headertitle', 'app title');
$layout->somekey = "value"
PHP應用3.其它獲取layout對象的辦法
PHP應用(1)
PHP應用
$layout = Zend_Layout::getMvcInstance();
PHP應用(2)
PHP應用
$layout = $bootstrap->getResource('Layout');
PHP應用四、其它用法,實現原理
PHP應用具體其它的使用辦法可以參考
PHP應用Zend_Layout_Controller_Action_Helper_Layout類,
Zend_Layout_Controller_Plugin_Layout類
Zend_View_Helper_Layout類
不言自明.
PHP應用
<?php
/** Zend_Controller_Action_Helper_Abstract */
require_once 'Zend/Controller/Action/Helper/Abstract.php';
/**
* Helper for interacting with Zend_Layout objects
*
* @uses Zend_Controller_Action_Helper_Abstract
* @category Zend
* @package Zend_Controller
* @subpackage Zend_Controller_Action
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Layout_Controller_Action_Helper_Layout extends Zend_Controller_Action_Helper_Abstract
{
/**
* @var Zend_Controller_Front
*/
protected $_frontController;
/**
* @var Zend_Layout
*/
protected $_layout;
/**
* @var bool
*/
protected $_isActionControllerSuccessful = false;
/**
* Constructor
*
* @param Zend_Layout $layout
* @return void
*/
public function __construct(Zend_Layout $layout = null)
{
if (null !== $layout) {
$this->setLayoutInstance($layout);
} else {
/**
* @see Zend_Layout
*/
require_once 'Zend/Layout.php';
$layout = Zend_Layout::getMvcInstance();
}
if (null !== $layout) {
$pluginClass = $layout->getPluginClass();
$front = $this->getFrontController();
if ($front->hasPlugin($pluginClass)) {
$plugin = $front->getPlugin($pluginClass);
$plugin->setLayoutActionHelper($this);
}
}
}
public function init()
{
$this->_isActionControllerSuccessful = false;
}
/**
* Get front controller instance
*
* @return Zend_Controller_Front
*/
public function getFrontController()
{
if (null === $this->_frontController) {
/**
* @see Zend_Controller_Front
*/
require_once 'Zend/Controller/Front.php';
$this->_frontController = Zend_Controller_Front::getInstance();
}
return $this->_frontController;
}
/**
* Get layout object
*
* @return Zend_Layout
*/
public function getLayoutInstance()
{
if (null === $this->_layout) {
/**
* @see Zend_Layout
*/
require_once 'Zend/Layout.php';
if (null === ($this->_layout = Zend_Layout::getMvcInstance())) {
$this->_layout = new Zend_Layout();
}
}
return $this->_layout;
}
/**
* Set layout object
*
* @param Zend_Layout $layout
* @return Zend_Layout_Controller_Action_Helper_Layout
*/
public function setLayoutInstance(Zend_Layout $layout)
{
$this->_layout = $layout;
return $this;
}
/**
* Mark Action Controller (according to this plugin) as Running successfully
*
* @return Zend_Layout_Controller_Action_Helper_Layout
*/
public function postDispatch()
{
$this->_isActionControllerSuccessful = true;
return $this;
}
/**
* Did the previous action successfully complete?
*
* @return bool
*/
public function isActionControllerSuccessful()
{
return $this->_isActionControllerSuccessful;
}
/**
* Strategy pattern; call object as method
*
* Returns layout object
*
* @return Zend_Layout
*/
public function direct()
{
return $this->getLayoutInstance();
}
/**
* Proxy method calls to layout object
*
* @param string $method
* @param array $args
* @return mixed
*/
public function __call($method, $args)
{
$layout = $this->getLayoutInstance();
if (method_exists($layout, $method)) {
return call_user_func_array(array($layout, $method), $args);
}
require_once 'Zend/Layout/Exception.php';
throw new Zend_Layout_Exception(sprintf("Invalid method '%s' called on layout action helper", $method));
}
}
PHP應用
<?php
/** Zend_Controller_Plugin_Abstract */
require_once 'Zend/Controller/Plugin/Abstract.php';
/**
* Render layouts
*
* @uses Zend_Controller_Plugin_Abstract
* @category Zend
* @package Zend_Controller
* @subpackage Plugins
* @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: Layout.php 23775 2011-03-01 17:25:24Z ralph $
*/
class Zend_Layout_Controller_Plugin_Layout extends Zend_Controller_Plugin_Abstract
{
protected $_layoutActionHelper = null;
/**
* @var Zend_Layout
*/
protected $_layout;
/**
* Constructor
*
* @param Zend_Layout $layout
* @return void
*/
public function __construct(Zend_Layout $layout = null)
{
if (null !== $layout) {
$this->setLayout($layout);
}
}
/**
* Retrieve layout object
*
* @return Zend_Layout
*/
public function getLayout()
{
return $this->_layout;
}
/**
* Set layout object
*
* @param Zend_Layout $layout
* @return Zend_Layout_Controller_Plugin_Layout
*/
public function setLayout(Zend_Layout $layout)
{
$this->_layout = $layout;
return $this;
}
/**
* Set layout action helper
*
* @param Zend_Layout_Controller_Action_Helper_Layout $layoutActionHelper
* @return Zend_Layout_Controller_Plugin_Layout
*/
public function setLayoutActionHelper(Zend_Layout_Controller_Action_Helper_Layout $layoutActionHelper)
{
$this->_layoutActionHelper = $layoutActionHelper;
return $this;
}
/**
* Retrieve layout action helper
*
* @return Zend_Layout_Controller_Action_Helper_Layout
*/
public function getLayoutActionHelper()
{
return $this->_layoutActionHelper;
}
/**
* postDispatch() plugin hook -- render layout
*
* @param Zend_Controller_Request_Abstract $request
* @return void
*/
public function postDispatch(Zend_Controller_Request_Abstract $request)
{
$layout = $this->getLayout();
$helper = $this->getLayoutActionHelper();
// Return early if forward detected
if (!$request->isDispatched()
|| $this->getResponse()->isRedirect()
|| ($layout->getMvcSuccessfulActionOnly()
&& (!empty($helper) && !$helper->isActionControllerSuccessful())))
{
return;
}
// Return early if layout has been disabled
if (!$layout->isEnabled()) {
return;
}
$response = $this->getResponse();
$content = $response->getBody(true);
$contentKey = $layout->getContentKey();
if (isset($content['default'])) {
$content[$contentKey] = $content['default'];
}
if ('default' != $contentKey) {
unset($content['default']);
}
$layout->assign($content);
$fullContent = null;
$obStartLevel = ob_get_level();
try {
$fullContent = $layout->render();
$response->setBody($fullContent);
} catch (Exception $e) {
while (ob_get_level() > $obStartLevel) {
$fullContent .= ob_get_clean();
}
$request->setParam('layoutFullContent', $fullContent);
$request->setParam('layoutContent', $layout->content);
$response->setBody(null);
throw $e;
}
}
}
PHP應用
<?php
/** Zend_View_Helper_Abstract.php */
require_once 'Zend/View/Helper/Abstract.php';
/**
* View helper for retrieving layout object
*
* @package Zend_View
* @subpackage 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
*/
class Zend_View_Helper_Layout extends Zend_View_Helper_Abstract
{
/** @var Zend_Layout */
protected $_layout;
/**
* Get layout object
*
* @return Zend_Layout
*/
public function getLayout()
{
if (null === $this->_layout) {
require_once 'Zend/Layout.php';
$this->_layout = Zend_Layout::getMvcInstance();
if (null === $this->_layout) {
// Implicitly creates layout object
$this->_layout = new Zend_Layout();
}
}
return $this->_layout;
}
/**
* Set layout object
*
* @param Zend_Layout $layout
* @return Zend_Layout_Controller_Action_Helper_Layout
*/
public function setLayout(Zend_Layout $layout)
{
$this->_layout = $layout;
return $this;
}
/**
* Return layout object
*
* Usage: $this->layout()->setLayout('alternate');
*
* @return Zend_Layout
*/
public function layout()
{
return $this->getLayout();
}
}
PHP應用更多關于zend相關內容感興趣的讀者可查看本站專題：《Zend FrameWork框架入門教程》、《php優秀開發框架總結》、《Yii框架入門及常用技巧總結》、《ThinkPHP入門教程》、《php面向對象程序設計入門教程》、《php+mysql數據庫操作入門教程》及《php常見數據庫操作技巧匯總》
PHP應用希望本文所述對大家PHP程序設計有所贊助.
《PHP應用：Zend Framework教程之Zend_Layout布局助手詳解》是否對您有啟發，歡迎查看更多與《PHP應用：Zend Framework教程之Zend_Layout布局助手詳解》相關教程，學精學透。維易PHP學院為您提供精彩教程。
轉載請注明本頁網址：
http://www.snjht.com/jiaocheng/7468.html
