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在PHP中实现asp.net的StringBuilder类

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/********************************************  
  *  
  * 函数名:StringBuilder  
  * 作  用:构造PHP下的StringBuilder类  
  * 作  者:雪狐博客 
  * 来 源 :http://www.xuehuwang.com/
  * 日  期:2011-11-09   
  *  
  ********************************************/
class StringBuilder  
{  
    const LINE="<br/>";  
    protected $list= array(&#39;&#39;);  
       
           
    public function __construct( $str=NULL)  
    {  
        array_push($this->list,$str);  
           
    }  
           
    public function Append($str)  
    {  
        array_push($this->list,$str);  
        return $this;  
    }  
       
    public function AppendLine($str)  
    {  
        array_push($this->list,$str.self::LINE);  
        return $this;  
    }  
       
    public function AppendFormat( $str,mixed $args)  
    {  
        array_push($this->list, sprintf($str,$args));  
        return $this;  
    }  
       
    public function ToString()  
    {  
        return implode("",$this->list);  
    }  
       
    public function __destruct()  
    {  
        unset($this->list);  
    }  
}

                   

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