php5类中三种数据类型的区别

3. /**

4. * parent　只能调用父类中的公有或受保护的方法，不能调用父类中的属性
5. * self 　可以调用父类中除私有类型的方法和属性外的所有数据
6. */
7. class User{
8. public $name;
9. private $passwd;
10. protected $email;
11. public function __construct(){
12. //print __CLASS__." ";
13. $this->name= 'simple';
14. $this->passwd='123456';
15. $this->email = '[e-mail]';
16. }
17. public function show(){
18. print "good ";
19. }
20. public function inUserClassPublic() {
21. print __CLASS__.'::'.__FUNCTION__." ";
22. }
23. protected function inUserClassProtected(){
24. print __CLASS__.'::'.__FUNCTION__." ";
25. }
26. private function inUserClassPrivate(){
27. print __CLASS__.'::'.__FUNCTION__." ";
28. }
29. }

30. class simpleUser extends User {

31. public function __construct(){
32. //print __CLASS__." ";
33. parent::__construct();
34. }
36. public function show(){
37. print $this->name."//public ";
38. print $this->passwd."//private ";
39. print $this->email."//protected ";
40. }
42. public function inSimpleUserClassPublic() {
43. print __CLASS__.'::'.__FUNCTION__." ";
44. }
46. protected function inSimpleUserClassProtected(){
47. print __CLASS__.'::'.__FUNCTION__." ";
48. }
50. private function inSimpleUserClassPrivate() {
51. print __CLASS__.'::'.__FUNCTION__." ";
52. }
53. }

54. class adminUser extends simpleUser {

55. protected $admin_user;
56. public function __construct(){
57. //print __CLASS__." ";
58. parent::__construct();
59. }
61. public function inAdminUserClassPublic(){
62. print __CLASS__.'::'.__FUNCTION__." ";
63. }
65. protected function inAdminUserClassProtected(){
66. print __CLASS__.'::'.__FUNCTION__." ";
67. }
69. private function inAdminUserClassPrivate(){
70. print __CLASS__.'::'.__FUNCTION__." ";
71. }
72. }

73. class administrator extends adminUser {

74. public function __construct(){
75. parent::__construct();
76. }
77. }

78. /**

79. * 在类的实例中 只有公有属性和方法才可以通过实例化来调用
80. */
81. $s = new administrator();
82. print '-------------------';
83. $s->show();
84. ?>

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