<?php
header("Content-Type: text/html; charset=utf-8");
class person{
	public $name;
	public $age;
	public $sex;
	
	public function __construct($name,$age,$sex){
		$this -> name = $name;
		$this -> age = $age;
		$this -> sex = $sex;		
	}	
	
	public function say(){
		echo "名字：{$this -> name}，年齡：{$this -> age}，性別：{$this -> sex}";
	}
}

/*
 * 重寫：宣告 一個與父類中同名的方法
 * 
 * 過載：parent:: 父類中的方法名
 * 
 */

//第一個

class teacher extends person{
	public $tesch;
	
	public function __construct($name,$age,$sex,$tesch){
		
/*		$this -> name = $name;
		$this -> age = $age;
		$this -> sex = $sex;*/				
		/*呼叫父類方法*/
		parent::__construct($name,$age,$sex);
		$this -> tesch = $tesch;		
	}	
	
	public function say(){
		/*呼叫父類方法*/
		parent::say();
		echo "，學科：{$this -> tesch}";
	}
}

//第二個
class stud extends person{
	public $tesch;	
	public function __construct($name,$age,$sex,$tesch){
		parent::__construct($name,$age,$sex);
		$this -> tesch = $tesch;		
	}		
	public function say(){
		parent::say();
		echo "，船長：{$this -> tesch}";
	}
}

$teacher= new teacher('娜美',20,'女','航海士');
$teacher -> say();

echo '<hr/>';

$stud= new stud('路飛',19,'男','玩');
$stud -> say();
?>