php接口与接口引用的深入解析
1、接口的介绍与创建
关键字 :interface
2、接口的引用与规范
关键字 :implements
接口:一种成员属性全部为抽象的特殊抽象类,在程序中同为规范的作用
1、类中全部为抽象方法
2、抽象方法前不用加abstract
3、接口抽象方法属性为public
4、成员属性必须为常量
抽象:
1、类中至少有一个抽象方法
2、抽象方法前需加abstract
共同点:
1、本身都不能被实例化,必须被继承或者引用
2、继承或者引用后,需要把所有抽象方法重载方可使用
接口有自己的创建关键字:interface 与普通类的创建类似
复制代码 代码如下:
interface demo {
const NAME="名字";
function Fun1();//对象方法全部为抽象方法,前面无须加adstract
function Fun2();
}
接口可以使用关键字:implements 多个引用并用逗号 , 分开.
1、普通类引用接口例子:
复制代码 代码如下:
class mypc implements demo , demo2 , demo3{
……
}
2、抽象类引用接口例子:
复制代码 代码如下:
abstract class mypc implements demo , demo2 , demo3{
……
}
3、继承父类引用接口并存例子:
复制代码 代码如下:
class mypc extends root implements demo , demo2 , demo3{
……
}
4、接口与接口继承:
复制代码 代码如下:
interface demo3 extends demo{
……
}

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