PHP面向对象编程学习之一

标签：php   面向对象   

3、子类可以修改和调整父类定义的类成员

<?php
class Animal {
	private $weight;
	public function getWeight()
	{
		return $this->weight;
	}
	public function setWeight($w)
	{
		$this->weight = $w;
	}
}

class Dog extends Animal
{
	/**
	*子类新增方法
	*/
	public function Bark()
	{
		echo "Wang~~Wang~~~ ";
	}
}

$myDog = new Dog();
$myDog->setWeight(20);
echo "Mydog's weight is ".$myDog->getWeight().'<br>';
$myDog->Bark();
?>

PHP面向对象编程学习之一

标签：php   面向对象   

原文地址：http://blog.csdn.net/zhao1234567890123456/article/details/43120919