php笔记(七)PHP类于对象之多态-LMLPHP

<?php

interface ICanEat{
  public function eat($food);
}

class Human implements ICaneat{

  public function eat($food){

  echo "Human eating".$food."\n";

  }

}

class Animal implements ICaneat{

  public function eat($food){

  echo "Animal eating".$food."\n";

  }

}

//在ICanEat接口下的eat()方法,在Human类和Animal类中实现的结果是不一样的,这就是多态

$person = new Human();

$person->eat('apple');

$animal = new Animal();

$animal->eat('banana');

  function checkeat($person){

    if($person instanceof ICanEat){

      $persong->eat('food');

    }else{

       echo "not find";

       }

  }

//相同的一行代码,对于传入不同的接口的实现对象的时候,表现是不同的,这就是多态

checkeat($person);

checkeat($animal);

输出的结果就是

Human eating food

Animal eating food

?>

04-24 22:26