php类属性与类常量

define('SITE_NAME','PHP中文网'); class User1 { //声明属性 private $siteName = SITE_NAME; private $name = '老顽童'; private $email = 'lwt@php.cn'; private $course = ['php','java','python']; const LECTURE = '朱老师'; //构造方法 public function __construct($name='',$email='', $siteName='',array $course=[]) { //如果传参,则使用新值初始化属性,否则使用默认值 $name ? ($this->name = $name) : $this->name; $email ? ($this->email = $email) : $this->email; $siteName ? ($this->siteName = $siteName) : $this->siteName; $course ? ($this->course = $course) : $this->course; } //查询器 public function __get($name) { return $this->$name; } //设置器 public function __set($name,$value) { return $this->$name = $value; } //在类中访问类常量,使用self来引用当前类名 public function getConst() { //类内部也可以直接使用当前类名 // return User1::LECTURE; //推荐使用self:当类名改变时,不必修改内部对它的引用 return self::LECTURE; } }