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 $this->age;  	}  	  	public function SayHello()  	{  		printf("
name:%s,age:%d",$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 $this->work;  	}  	  	public function Introduce()  	{  		printf("
name:%s,age:%d,work:%s",$this->getName(),$this->getAge(),$this->getWork());  	}  }    $student = new Student("wangwu", 18, "学生");  $student->SayHello();  $student->Introduce();?>