php5析构函数用法示例

2. /*
3. * to change the template for this generated file go to
4. * window - preferences - phpeclipse - php - code templates
5. */
6. class student{
7. //属性
8. private $no;
9. private $name;
10. private $gender;
11. private $age;
13. private static $count=0;
14. function __construct($pname)
15. {
16. $this->name = $pname;
17. self::$count++;
18. }
20. function __destruct()
21. {
22. self::$count--;
23. }
25. static function get_count()
26. {
27. return self::$count;
28. }
29. }
31. $s1=new student("tom");
32. print(student::get_count());
34. $s2=new student("jerry");
35. print(student::get_count());
37. $s1=null;
38. print(student::get_count());
40. $s2=null;
41. print(student::get_count());
42. ?>

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以上实例展示了php5析构函数的用法。