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Homephp教程php手册PHP接口(interface)和抽象类(abstract)

interface

定义了一个接口类,它里面的方法其子类必须实现。接口是类的一个模板,其子类必须实现接口中定义的所有方法。

interface User{

    function getHeight($height);

    function getWeight($weight); 

}

class my implements User{

    function getHeight($username){

        echo $height;

    }

    function getWeight($weight){

        echo $weight;

    }

}

abstract

抽象类就把类像的部分抽出来,就是把重复的东西写到抽象类中,减少工作量。只要方法没有用abstract声明,在其子类中就不用实现。而且在子类中该方法为公共方法。

abstract User{

    abstract function getHeight($height);

    function getWeight(){

        echo $weight;

    }

}

class my extends User{

    function getHeight($height){

         echo $height;

    }

    function getInfoById($id){

        $this->getWeight.“
”;

        echo $id;

    }

}

 

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