为什么未初始化的属性在课堂上公开? [英] why uninitialized property is made public in class?

问题描述

请考虑以下代码:

class foo {
    function bar() {
        $this->baz = 'hello there!';
    }
}

$f = new foo;
$f->bar();
echo $f->baz; // hello there!

为什么上面的代码起作用?我的意思是我还没有初始化$baz变量，也没有使用__get和__set魔术方法.我原以为这会给我错误，但是看来$baz已创建并分配了public可见性. (顺便说一句，它确实在静态上下文中提供了错误)

Why does above code work ? I mean I have not initialized the $baz variable and also I am not using __get and __set magic methods. I was expecting it would give me error, but it seems the $baz has been created and assigned public visibility. (BTW it does give error in static context though)

推荐答案

谁告诉您尚未初始化，您已通过语句$this->baz = 'hello there!';进行了初始化 这就是面向对象概念的工作方式.您要声明一个类，为该类创建一个实例，然后访问该函数，最后在该成员函数中回显一个变量，这就是面向对象的工作原理...

Who told that you are not initialized,You have initialized by the statement $this->baz = 'hello there!'; This is how object oriented concept works.You are declaring a class , creating an instance for that class and then accessing that function and at last echoing a variable in that member function,This is how object orientation works...

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