php面向对象--继承

<?php

class Person {
	
	protected $name;
	
    public function __construct($name) {
	    $this->name = $name;
    }
    
    public function showPersonInfo() {
	    echo "person name: " . $this->name;
    }	
}

class Developer extends Person{
		
	protected $macType;
	
	public function __construct($name,$macType) {
		parent::__construct($name);
		$this->macType = $macType; 
	}
	
	public function showPersonInfo() {
		echo "developer name:" . $this->name . " developer's mac type:" . $this->macType;
	}
}


$developer = new Developer("goodboy","MBP");
$developer->showPersonInfo();

?>