类的封装,公开，私有，继承

<?php

class Staff

{

public $name;

protected $dept;

private $salary;

public function __construct($name,$dept,$salary)

{

$this->name = $name;

$this->dept = $dept;

$this->salary = $salary;

}

public function getDept()

{

return $this->dept;

}

}

$staff = new Staff('小龙女','开发部门','5000');

echo '姓名',$staff->name,'<br>';

echo '部门',$staff->getDept();