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1 <?php
2
3 class UserName
4 {
5 //定義屬性
6 private name;
7
8 //定義構造函數
9 function __construct( name )
10 {
11 this->name = name; //這里已經使用了this指針
12 }
13
14 //析構函數
15 function __destruct(){}
16
17 //打印用戶名成員函數
18 function printName()
19 {
20 print( this->name ); //又使用了this指針
21 }
22 }
23
24 //實例化對象
25 nameObject = new UserName( "heiyeluren" );
26
27 //執行打印
28 nameObject->printName(); //輸出: heiyeluren
29
30 //第二次實例化對象
31 nameObject2 = new UserName( "PHP5" );
32
33 //執行打印
34 nameObject2->printName(); //輸出：PHP5
35 ?>

1 <?php
2
3 class Counter
4 {
5 //定義屬性，包括一個靜態變量
6 private static firstCount = 0;
7 private lastCount;
8
9 //構造函數
10 function __construct()
11 {
12 this->lastCount = selft::firstCount; //使用self來調用靜態變量,使用self調用必須使用::(域運算符號)
13 }
14
15 //打印最次數值
16 function printLastCount()
17 {
18 print( this->lastCount );
19 }
20 }
21
22 //實例化對象
23 countObject = new Counter();
24
25 countObject->printLastCount(); //輸出 1
26
27 ?>

1 <?php
2
3 //基類
4 class Animal
5 {
6 //基類的屬性
7 public name; //名字
8
9 //基類的構造函數
10 public function __construct( name )
11 {
12 this->name = name;
13 }
14 }
15
16 //派生類
17 class Person extends Animal //Person類繼承了Animal類
18 {
19 public personSex; //性別
20 public personAge; //年齡
21
22 //繼承類的構造函數
23 function __construct( personSex, personAge )
24 {
25 parent::__construct( "heiyeluren" ); //使用parent調用了父類的構造函數
26 this->personSex = personSex;
27 this->personAge = personAge;
28 }
29
30 function printPerson()
31 {
32 print( this->name. " is " .this->personSex. ",this year " .this->personAge );
33 }
34 }
35
36 //實例化Person對象
37 personObject = new Person( "male", "21");
38
39 //執行打印
40 personObject->printPerson(); //輸出：heiyeluren is male,this year 21
41
42 ?>