Using clips_Yii Application Development Cookbook（Second Edition）-QQ阅读男生历史网

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Using clips

One of the Yii features you can use in your views is clips . The basic idea is that you can record some output and then reuse it later in a view. A good example would be defining additional content regions for your layout and filling them elsewhere.

Getting ready

Set up a new application using yiic webapp.

How to do it...

For our example, we need to define two regions in our layout: beforeContent and footer. Open protected/views/layouts/main.php and insert the following code line just before the content output (<?php echo $content; ?>):
```
<?php if(!empty($this->clips['beforeContent'])) echo $this->clips['beforeContent']?>
```
Then, insert the following into <div id="footer">:
```
<?php if(!empty($this->clips['footer'])) echo $this->clips['footer']?>
```
That is it! Now, we need to fill these regions somehow. We will use a controller action for the beforeContent region. Open protected/controllers/SiteController.php and add the following code to actionIndex:
```
$this->beginClip('beforeContent');
echo 'Your IP is '.Yii::app()->request->userHostAddress;
$this->endClip();
```
As for footer, we will set its content from a view. Open protected/views/site/index.php and add the following code:
```
<?php $this->beginClip('footer')?>
This application was built with Yii.
<?php $this->endClip()?>
```
Now, when you open your website's index page, you should get your IP just before the page content and a "built with" note in the footer.

How it works...

We mark regions with the code that just checks for existence of a clip specified, and if the clip exists, the code outputs it. Then, we record content for clips we defined using special controller methods named beginClip and endClip.

Using clips

Getting ready

How to do it...

How it works...

See also