PHP类与继承

<?php

  class Person

  {

  	private $name;

  	private $age;

  	

  	function __construct($name,$age){

  		$this->name = $name;

  		$this->age = $age;

  	}

  	

  	public function setName($name)

  	{

  		$this->name = $name;

  	}

  	

  	public function getName()

  	{

  		return $this->name;

  	}

  	

  	public function setAge($age)

  	{

  		$this->age = $age;

  	}

  	

  	public function getAge()

  	{

  		return $this->age;

  	}

  	

  	public function SayHello()

  	{

  		printf("<br/>name:%s,age:%d",$this->name,$this->age);

  	}

  }

  

  $person = new Person("zhangsan", 20);

  $person->SayHello();

  

  

  

  class Student extends  Person

  {

  	private $work;

  	function __construct($name,$age,$work)

  	{

  		parent::__construct($name, $age);

  		$this->work = $work;

  	}

  	

  	public function setWork($work)

  	{

  		$this->work = "学生";

  	}

  	

  	public function getWork()

  	{

  		return $this->work;

  	}

  	

  	public function Introduce()

  	{

  		printf("<br/>name:%s,age:%d,work:%s",$this->getName(),$this->getAge(),$this->getWork());

  	}

  }

  

  $student = new Student("wangwu", 18, "学生");

  $student->SayHello();

  $student->Introduce();

?>