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5月3,父类与子类
1
Original
795 people have browsed it

实例

这是父类:

<?php

class Car
{
    //受保护的类
    protected $brand;//品牌
    protected $price;//价格

    //构造方法
    public function __construct($brand,$price)
    {
        $this->brand = $brand;
        $this->price = $price;
    }
    //speed方法
    public function speed()
    {
        return '我是父类';
    }
}

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这是子类:

实例

<?php

class SmartCar extends Car
{
    //私有属性
    private $autopilot = false;

    //构造方法
    public function __construct($brand, $price,$autopilot)
    {
        //父类的构造方法
        parent::__construct($brand, $price);
        $this->autopilot = $autopilot;
    }
    //魔术方法
    public function __get($name)
    {
        return $this->$name;
    }
    //导航方法
    public function navigation()
    {
        return '我是子类的方法';
    }
    //父类的方法重写
    public function speed()
    {
        return parent::speed().'+这是父类的重写';
    }
}

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这是测试脚本:

实例

<meta charset="UTF-8">
<?php
spl_autoload_register(function ($classname){
    require './class/'.$classname.'.php';
});

$smartcar = new SmartCar('Benz','1000万',false);

echo $smartcar->brand;
echo $smartcar->price;
echo ($smartcar->autopilot?'支持':'不支持');

echo $smartcar->speed();
echo $smartcar->navigation();

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Correction status:Uncorrected

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    2018-03-16 00:39:40