PHP继承问题，吓死我了

发布于 2024-12-04 22:00:32 字数 935 浏览 1 评论 0原文

有一个问题让我很困惑。父构造函数是否会在不被调用的情况下构造自身？

因为我看到它在某种情况下起作用，而不是在我写的剧本上。

我得到以下内容：

类路由器上的boot.php

$this->router = new router($param);

router.php

class router extends routerController

我没有任何 __construct。

routercontroller.php

class routerController{
    function __construct($param){
        $this->param = $param;
    }

如果我向类路由器添加 __construct ，则不会执行扩展类 routerController 中的 __construct 。因此，在这种情况下，构造函数似乎是在没有parent::_construct 的情况下构造的。

在同一个脚本中，我进入了 routerController 类。

$this->newclass = newclass($this->param);

newClass 扩展了 someClass。由于某种原因，如果我不使用parent::__construct($param) 从 newClass 调用 someClass 构造函数，则该构造函数不会被实例化。

我已经花了几个小时检查所有代码，但找不到我做错了什么。为什么在第一种情况下，父构造函数在没有被调用的情况下被实例化，而在第二种情况下却没有被实例化？

这是一个错误吗？知道我做错了什么吗？

原文

Got a question that is freaking me out. Do parent constructors constructs itself without being called?

Cause Im seeing it working on a situation and not on the script Im writing.

I got the following:

boot.php

$this->router = new router($param);

router.php

class router extends routerController

on the class router I don't have any __construct.

routercontroller.php

class routerController{
    function __construct($param){
        $this->param = $param;
    }

if I add a __construct to the class router the __construct from the extended class routerController is not executed. So, it seems on this case the constructor is being constructed without a parent::_construct.

On the same script I got inside the routerController class.

$this->newclass = newclass($this->param);

newClass extends someClass. For some reason the someClass constructor is not instantiated if I don't call it from the newClass using parent::__construct($param).

I already spent hours reviewing all the code and can't find what Im doing wrong. Why in the first case the parent constructor is instantiated without being called and on the second case not?

Is this a bug? Any idea what I am doing wrong?

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