本文实例讲述了Zend Framework框架Smarty扩展实现方法。分享给大家供大家参考，具体如下：
今天总结一下ZF框架中扩展Smarty模板的方法，在ZF帮助文档中已经有比较详细的介绍，在这我稍微多说一些。
一.将smarty的核心文件包放在lib文件夹下，文件包中要包括（internals/,plugins/,Config_File.class.php,Smarty.class.php,Smarty_Compiler.class.php,debug.tpl）.
二.在Zend/View下添加文件：Smarty.php ，文件的内容如下：
<?php
/**
* Zend_View_Interface
*/
require_once 'Zend/View/Interface.php';
/**
* Smarty
*/
require_once("smarty/Smarty.class.php");
/**
* 创建Smarty视图
*/
class Zend_View_Smarty implements Zend_View_Interface
{
/**
* Smarty object
* @var Smarty
*/
protected $_smarty;
/**
* Constructor
*
* @param string $tmplPath
* @param array $extraParams
* @return void
*/
public function __construct($tmplPath = null, $extraParams = array())
{
$this->_smarty = new Smarty;
if (null !== $tmplPath) {
$this->setScriptPath($tmplPath);
}
foreach ($extraParams as $key => $value) {
$this->_smarty->$key = $value;
}
}
/**
* Return the template engine object
*
* @return Smarty
*/
public function getEngine()
{
return $this->_smarty;
}
/**
* Set the path to the templates
*
* @param string $path The directory to set as the path.
* @return void
*/
public function setScriptPath($path)
{
if (is_readable($path)) {
$this->_smarty->template_dir = $path;
return;
}
throw new Exception('Invalid path provided');
}
/**
* set smarty缓存
* @author lengfeng
*/
public function setCompilePath($path){
if (is_readable($path)) {
$this->_smarty->compile_dir = $path;
return;
}
throw new Exception('Invalid path provided');
}
/**
* set smarty 编译后文档
* @author lengfeng
*/
public function setCachePath($path){
if (is_readable($path)) {
$this->_smarty->cache_dir = $path;
return;
}
throw new Exception('Invalid path provided');
}
/**
* Retrieve the current template directory
*
* @return string
*/
public function getScriptPaths()
{
return array($this->_smarty->template_dir);
}
/**
* Alias for setScriptPath
*
* @param string $path
* @param string $prefix Unused
* @return void
*/
public function setBasePath($path, $prefix = 'Zend_View')
{
return $this->setScriptPath($path);
}
/**
* Alias for setScriptPath
*
* @param string $path
* @param string $prefix Unused
* @return void
*/
public function addBasePath($path, $prefix = 'Zend_View')
{
return $this->setScriptPath($path);
}
/**
* Assign a variable to the template
*
* @param string $key The variable name.
* @param mixed $val The variable value.
* @return void
*/
public function __set($key, $val)
{
$this->_smarty->assign($key, $val);
}
/**
* Retrieve an assigned variable
*
* @param string $key The variable name.
* @return mixed The variable value.
*/
public function __get($key)
{
return $this->_smarty->get_template_vars($key);
}
/**
* Allows testing with empty() and isset() to work
*
* @param string $key
* @return boolean
*/
public function __isset($key)
{
return (null !== $this->_smarty->get_template_vars($key));
}
/**
* Allows unset() on object properties to work
*
* @param string $key
* @return void
*/
public function __unset($key)
{
$this->_smarty->clear_assign($key);
}
/**
* Assign variables to the template
*
* Allows setting a specific key to the specified value, OR passing an array
* of key => value pairs to set en masse.
*
* @see __set()
* @param string|array $spec The assignment strategy to use (key or array of key
* => value pairs)
* @param mixed $value (Optional) If assigning a named variable, use this
* as the value.
* @return void
*/
public function assign($spec, $value = null)
{
if (is_array($spec)) {
$this->_smarty->assign($spec);
return;
}
$this->_smarty->assign($spec, $value);
}
/**
* Clear all assigned variables
*
* Clears all variables assigned to Zend_View either via {@link assign()} or
* property overloading ({@link __get()}/{@link __set()}).
*
* @return void
*/
public function clearVars()
{
$this->_smarty->clear_all_assign();
}
/**
* Processes a template and returns the output.
*
* @param string $name The template to process.
* @return string The output.
*/
public function render($name)
{
return $this->_smarty->fetch($name);
}
/**
* 设置是否生成缓存
* 如果没有参数,默认为true
*/
public function setCache($bool){
if (isset($bool)) {
$this->_smarty->caching = $bool;
return;
}
}
}
三.在app文件夹下创建cache ，compile 文件夹
四.在config.ini 配置文件中加入
dir.compile = ../app/compile dir.cache = ../app/cache
三，四两步可以参见前面关于zendfreamwork框架搭建网站相关教程
五.在application.php 文件中添加
/**
* 初始化smarty视图
*
*/
private function _initSmartyView()
{
$view = new Zend_View_Smarty();
$view->setBasePath($this->_pathConfig->dir->viewBase);
$view->setScriptPath($this->_pathConfig->dir->viewBase."/scripts");
$view->setCompilePath($this->_pathConfig->dir->compile);
$view->setCachePath($this->_pathConfig->dir->cache);
$smarty=$view->getEngine();
$smarty->caching=false;
$smarty->debugging = true;
$smarty->compile_check = true;
$smarty->left_delimiter = "<{"; //定义标示符
$smarty->right_delimiter = "}>";
$registry = Zend_Registry::getInstance();
$registry->set('smartyview',$smarty); //smarty对象
$registry->set('sview',$view);
}
并在 函数 init()中加入
$this->_initSmartyView();
六.在Controller中调用
因为已经将对象注册，所以可以如下调用：
$view = Zend_Registry::getInstance()->get("smartyview");
//注意这是smarty对象，使用smarty的那些语法，比如 $view->assign("user","root");
$view = Zend_Registry::getInstance()->get("sview");
//这是zf的view对象，按zf中的那些方法用，不用改变。
//按这样，你如果要将以前写的代码改为用smaty，后台不用变了，只需要将视图文件改变就行了
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