PHP中__set与__get使用示例

3. class Person {

4. function __get( $property ) {
5. $method = "get{$property}";
6. if ( method_exists( $this, $method ) ) {
7. return $this->$method();
8. }
9. }

10. function __isset( $property ) {

11. $method = "get{$property}";
12. return ( method_exists( $this, $method ) );
13. }

14. function getName() {

15. return "Bob";
16. }
18. function getAge() {
19. return 44;
20. }
21. }
22. print "

    ";
    $p = new Person();
    if ( isset( $p->name ) ) {
        print $p->name;
    } else {
        print "nope\n";
    }
    print "

    ";
23. // output:
24. // Bob
25. ?>

演示代码2：

3. class Person {

4. private $_name;
5. private $_age;

6. function __set( $property, $value ) {

7. $method = "set{$property}";
8. if ( method_exists( $this, $method ) ) {
9. return $this->$method( $value );
10. }
11. }
13. function __unset( $property ) {
14. $method = "set{$property}";
15. if ( method_exists( $this, $method ) ) {
16. $this->$method( null );
17. }
18. }
20. function setName( $name ) {
21. $this->_name = $name;
22. if ( ! is_null( $name ) ) {
23. $this->_name = strtoupper($this->_name);
24. }
25. }

26. function setAge( $age ) {

27. $this->_age = $age;
28. }
29. }
30. print "

    ";
    $p = new Person();
    $p->name = "bob";
    $p->age  = 44;
    print_r( $p );
    unset($p->name);
    print_r( $p );
    print "

    ";
31. ?>

输出结果： Person Object ( [_name:Person:private] => BOB [_age:Person:private] => 44 ) Person Object ( [_name:Person:private] => [_age:Person:private] => 44 )