Yii::getPathOfAlias('zii') 
Yii::import ('zii.*')  
Yii::setPathOfAlias('backend', $backend); 
'import' => array( 
'backend.models.*',  

Yii::getFrameworkPath() 
{full URL}

http://localhost/yii_lab/index.php?r=lab/urlBoyLeeTest 

Yii::import('application.venders.*');  

'import'=>array(  
    ......  
    'application.venders.*',  
  ), 

Yii::app()->clientScript->registerMetaTag('keywords','关键字'); 
Yii::app()->clientScript->registerMetaTag('description','一些描述'); 
Yii::app()->clientScript->registerMetaTag('author','作者'); 
<link rel="alternate" type="application/rss+xml" href="http://www.1sucai.cn/" />
Yii::app()->clientScript->registerLinkTag('alternate','application/rss+xml',$this->createUrl('/feed')); 

Yii::app()->clientScript->registerCssFile(Yii::app()->baseUrl.'/css/my.css'); 
Yii::app()->clientScript->registerScriptFile(Yii::app()->baseUrl.'/css/my.js'); 
<?php echo $this->module->assetsUrl; ?>/css/main.css 

Yii::app()->clientScript->registerCoreScript('jquery'); 

Yii::app()->getController()->id;  

Yii::app()->getController()->getAction()->id;  

Yii::app()->request->userHostAddress; 

Yii::app()->request->isPostRequest  

Yii::app()->request->hostInfo 

YII::app()->basePath; 

Yii::app()->request->urlReferrer; 

Yii::app()->request->url; 

Yii::app()->homeUrl 

Yii::app()->user->returnUrl 

dirname(Yii::app()->BasePath) 

Yii::getPathOfAlias('webroot')  

'aliases'=>array( 
'local'=>'path/to/local/' 
), 
<?php echo $this->getLayoutFile('main'); ?>
$this->redirect('index.php?r=admin/manage');
{createUrl()}
echo $this->createUrl('urlBoyLeeTest'); 
//out => /yii_lab/index.php?r=lab/urlBoyLeeTest 
$this->createUrl('post/read') // /index.php/post/read 
<?php echo Yii::app()->request->baseUrl; ?>/css/screen.css 
Yii::app()->theme->baseUrl.'/images/FileName.gif'  
{createAbsoluteUrl()}
echo $this->createAbsoluteUrl('urlBoyLeeTest'); 
//out => http://localhost/yii_lab/index.php?r=lab/urlBoyLeeTest