php5 destructor usage example

/*
 * to change the template for this generated file go to
 * window - preferences - phpeclipse - php - code templates
 */
 class student{
  //属性
  private $no;
  private $name;
  private $gender;
  private $age;

  private static $count=0;
  function __construct($pname)
  {
   $this->name = $pname;
   self::$count++;
  }

  function __destruct()
  {
   self::$count--;
  }

  static function get_count()
  {
   return self::$count;
  }
 }

 $s1=new student("tom");
 print(student::get_count());

 $s2=new student("jerry");
 print(student::get_count());

 $s1=null;
 print(student::get_count());

 $s2=null;
 print(student::get_count());
?>

以上实例展示了php5析构函数的用法。