PHP面向对象篇8 抽象类+方法+接口(系列篇)

<?php
header('Content-Type:text/html;charset=utf-8');
//抽象类
abstract class Humanity {
	public $name;
	public $sex;
	public $iq=10;
	const BIRTHPLACE='地球';
	static public $counter=0;//静态属性，它是公共的资源和具体的实例没有关系
	//构造函数
	public function __construct($name,$sex){
		self::$counter++;
		$this->name=$name;
		$this->sex=$sex;
	}
	protected function chew($food){
		echo "<p>{$food}已经被咀嚼完成！</p>";
	}
	//抽象方法
	abstract public function eat($food);
	static public function hello(){
		echo '<p>您好！我是来自'.self::BIRTHPLACE.'的人类</p>';
	}
}
class Student extends Humanity {
	const BIRTHPLACE='火星';
	public $studentId;
	public function test($subject){
		echo "<p>{$this->name}正在考{$subject}！</p>";
	}
	public function eat($food){
		$this->chew($food);
		echo "<p>{$this->name}正在快速的吃{$food}！</p>";
	}
}
class Worker extends Humanity {
	public function eat($food){
		$this->chew($food);
		echo "<p>{$this->name}正在的吃{$food}！</p>";
	}
}
$hanMM=new Student('韩梅梅','女');

<?php
interface iA {
	public function aa();
	public function bb();
}
interface iB {
	public function cc();
	public function dd();
}
interface iC extends iA,iB {
	
}
class ClassA implements iA {
	public function aa(){
		
	}
	public function bb(){
	
	}
}
class ClassB implements iA,iB {
	public function aa(){
	
	}
	public function bb(){
	
	}
	public function cc(){
	
	}
	public function dd(){
	
	}
}
class ClassC implements iC {
	public function aa(){
	
	}
	public function bb(){
	
	}
	public function cc(){
	
	}
	public function dd(){
	
	}
}
$c=new ClassC();