类属性设置和访问——2018年5月3日

php类的属性设置和访问

/class/Animal.php

实例

<?php
/**
 *
 */

class Animal
{
    private $height;
    private $weight;
    private $age;

    public function __construct($height,$weight,$age)
    {
        $this->height=$height;
        $this->weight=$weight;
        $this->age=$age;

    }

    public function __get($name)
    {
        if (isset($this->$name)){
            echo "Getting ".$name.':'.$this->$name.'<br>';
        } else {
            echo '没有初始值';
        }


    }

    public function __set($name, $value)
    {
        if (isset($this->$name)) {
            $this->$name=$value;
        } else {
            echo $name.'not set';
        }
    }

}

实例

<?php
/**
 *
 */

require './class/Animal.php';

$animal=new Animal(110,70,5);

$animal->height;
$animal->weight;
$animal->age;

echo '<hr>';


$animal->height=120;
$animal->weight=80;
$animal->age=7;

$animal->height;
$animal->weight;
$animal->age;