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PHP中的加强型接口Traits
阅读量:412 次
发布时间:2019-03-06

本文共 577 字,大约阅读时间需要 1 分钟。

接口是对多重继承的一种变相实现, Traits可以被视为一种加强型的接口.

 
先来看如下代码
trait Hello{    private $name = 'chenqionghe';    public function sayHello()    {        echo 'hello ';    }}trait World{    public $age = '18';    public function sayWorld()    {        echo 'world ! ';    }}class HandsonBoy{    use Hello,World;    public function say()    {        echo 'i am '.$this->name;    }}$boy = new HandSonBoy();$boy->sayHello();$boy->sayWorld();echo $boy->say();

上面代码的运行结果如下

这里的HandsonBoy同时实现了两个traits,从而使其可以分别调用两个Traits里的代码段.从代码就可以看出,traits和接口很像,不同的是traits是可以导入代码的接口.
从某种意义来说,traits和接口都是对"多重继承"的一种变相实现.

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