CodeIgniter模板引擎使用实例_php实例
一、示例：
通常在使用codeigniter的时候经常使用这样的方式载入：
$this->load->view('about', $data);
通过这个类库，可以将一个视图载入到这个模板中：
$this->template->load('template', 'about', $data);
这里将视图about.php载入到template模板文件中。
二、安装
下载ci_template_library.zip
解压后将Template.php放到application/libraries应用类库目录中；
应用程序启动自动加载application/config/autoload.php；
三、创建一个模板文件application/views/template.php
模板中的代码如下：
<html> <body> <div id="contents"><?= $contents ?></div> <div id="footer">Copyright 2008</div> </body> </html>
$contents是你在控制器中显示需要插入的内容。
四、创建一个视图application/views/about.php
添加如下代码：
<h1 id="About">About</h1> <p>I'm so human!</p>
在模板引擎中载入视图
在你的控制器中可以使用
$this->template->load('template', 'about');
这个模板引擎工作流程：
视图被载入到一个变量中，这个变量会被载入到模板中去
var $template_data = array();
function set($name, $value)
{
$this->template_data[$name] = $value;
}
function load($template = '', $view = '' , $view_data = array(), $return = FALSE)
{
$this->CI =& get_instance();
$this->set('contents', $this->CI->load->view($view, $view_data, TRUE));
return $this->CI->load->view($template, $this->template_data, $return);
}
五、技巧总结：
高级技巧1：模板中更简单的短标记
例子：你如果需要在页面中显示标题。
那么在HTML的头部views/template.php增加：
<head> <title><?= $title ?></title> </head>
然后直接在控制器中设置：
$this->template->set('title', 'About me');
高级技巧2：高亮显示当前导航
导航通常是被用于在模板中，一个体验好的导航应该告诉用户当前所处的位置分类是什么。
定义你的导航项目：
引入application/libraries/Template.php，然后在控制器中增加：
$this->set('nav_list', array('Home', 'Photos', 'About', 'Contact'));
更新你的模板：
在application/views/template.php中增加：
<ul class="navigation"> <?php foreach($nav_list as $i => $nav_item): ?> <li class="<?= ($nav == $nav_item ? 'selected' : '')?>"> <?= anchor($nav_item, $nav_item) ?> </li> <?php endforeach ?> </ul>
这里用到了anchor函数，需要在自动加载配置中增加相关的小助手：
$autoload['helper'] = array('url');
更新你的控制器：
增加：
$this->template->set('nav', 'About');
需要注意：
1·如果所有的导航都在一个控制器中，你可以在析构函数中增加通用的导航代码；
2·定义好当前导航的样式，例如：#navigation .selected
高级技巧3：多模板
最简单处理多个模板，可以在libraries/Template.php定义多个新的方法来替换已经存在的内容，第二个高级技巧使用自定义的方法：
function load_main($view = '', $view_data = array(), $return = FALSE)
{
$this->set('nav_list', array('Home', 'Photos', 'About', 'Contact'));
$this->load('template', $view, $view_data, $return);
}
将代码粘贴到控制器中
$this->template->set('nav', 'About');
$this->template->set('title', 'About me');
$this->template->load_main('about');
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