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class lamp
 {
   public function __construct()  
{
  }
  
  public function __get($var) //»ñÈ¡²»´æÔÚµÄÊôÐÔʱµ÷ÓÃ
  {
   echo "²»´æÔÚ±äÁ¿$var<br>";
  }
  public function __set($var,$val) //ÉèÖò»´æÔÚµÄÊôÐÔµ÷ÓÃ
  {
   echo "²»´æÔÚµÄÊôÐÔ".$var."¸³ÖµÎª$val<br>";
  }
  public function __isset($var) //µ÷ÓÃissetº¯Êýʱµ÷ÓÃ
  {
   echo $var."ÊôÐÔ²»´æÔÚ<br>";
  }
  public function __unset($var) //µ÷ÓÃunsetº¯Êýʱµ÷ÓÃ
  {
   echo $var."ÊôÐÔ±»unset<br>";
  }
  public function __call($func,$param) //µ÷Óò»´æÔڵķ½·¨Ê±µ÷ÓÃ
  {
   echo $func."²»´æÔÚ";
   print_r($param);
   echo "<br>";
  }
  
  public function __sleep() //serialize¶ÔÏóÊǵ÷ÓÃ
  {
   echo "sleep...<br>";
   return $this;
  }
  public function __wakeup() //unserialize¶ÔÏóʱµ÷ÓÃ
  {
   echo "wake up!<br>";
  }
  public function __clone() //¶ÔÏ󱻿Ë¡ʱµ÷ÓÃ
  {
   $this->sub=clone $this->sub;
  }
  public function __toString() //¶ÔÏó±»Êä³öʱµ÷ÓÃ
  {
   return strval($this->y); //±ØÐëΪstring
  }
 }


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