Yii使用公共函数

在网站项目中，没必要把公用的函数写成一个工具类，有时候面向过程其实更方便。
在入口文件index.php里添加
require_once('protected/function.php');
即可对其引用，成为公用的函数集合。
function.php如下：

<?php
/**
* This is the shortcut to DIRECTORY_SEPARATOR
*/
defined('DS') or define('DS',DIRECTORY_SEPARATOR);

defined('TIME') or define('TIME', time());

defined('MTIME') or define('MTIME', intval(microtime(true)));//返回当前unix时间戳
/**
* This is the shortcut to Yii::app()
*/
function app()
{
return Yii::app();
}

/**
* This is the shortcut to Yii::app()->clientScript
*/
function cs()
{
// You could also call the client script instance via Yii::app()->clientScript
// But this is faster
return Yii::app()->getClientScript();
}

/**
* This is the shortcut to Yii::app()->user.
*/
function user()
{
return Yii::app()->getUser();
}

/**
* This is the shortcut to Yii::app()->createUrl()
*/
function url( $route , $params = array (), $ampersand = '&' )
{
return Yii::app()->createUrl( $route , $params ,$ampersand );
}

/**
* This is the shortcut to CHtml::encode
*/
/* function h( $text )
{
return htmlspecialchars( $text ,ENT_QUOTES,Yii::app()->charset);
} */

/**
* This is the shortcut to Yii::app()->request->baseUrl
* If the parameter is given, it will be returned and prefixed with the app baseUrl.
*/
function baseDir( $url =null)
{
//static $baseUrl = null;
//if ( $baseUrl ===null)
$baseUrl =Yii::app()->getRequest()->getBaseUrl();
return $url ===null ? $baseUrl : $baseUrl . '/' .ltrim( $url , '/' );
}

/**
* Returns the named application parameter.
* This is the shortcut to Yii::app()->params[$name].
*/
function param( $name )
{
return Yii::app()->params[ $name ];
}
/**
* A useful one that I use in development is the following
* which dumps the target with syntax highlighting on by default
*/
function dump( $target )
{
return CVarDumper::dump( $target , 10, true) ;
}

function mk_dir($dir, $mode = 0777)
{
if (is_dir($dir) || @mkdir($dir,$mode)) return true;
if (!mk_dir(dirname($dir),$mode)) return false;
return @mkdir($dir,$mode);
}

//自定义更多函数...