php中的访问修饰符知识点

<?phpclass MyClass{public $public ='public';protected $protected ='protected';private $private ='private';//定义为公有的属性可以在任何地方访问，保护性的属性可以被其自身以及子类和父类访问，私有的类成员则只能在所定义的类中使用function printHell(){echo $this->public;echo $this->protected;echo $this->private;}}$obj = new MyClass();echo $obj->public;//echo $obj->protected;//echo $obj->private;$obj->printHell();?>