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...