如何通过自动加载在父类中伪装子类（php）

发布于 2024-09-24 09:30:14 字数 576 浏览 5 评论 0原文

我有一个基类，它被大约十个子类继承。这些子类中的大多数都有非常相似的行为，但我只想为其中三个定义专门的方法。

是否可以通过每次实例化子类的对象时自动加载父类来伪装这些类的存在？这样我就不必用相同的代码定义多个类了？

例如

class ParentClass {
    public function __construct() {
        switch(get_class($this)) {
            case "ChildClass1" : do_stuff() break;
            case "ChildClass2" : do_other_stuff() break;
            default: break;
        }
    }
}

$c1 = new ChildClass1();
$c2 = new ChildClass2();

......只有一个文件 ParentClass.php （没有单独的文件 ChildClass1.php 或 ChildClass2.php）。

原文

I have a base class that is inherited by about ten subclasses. Most of these subclasses have very similar behavior, but I want to define specialized methods only for three of them.

Is it possible to masquerade the existence of these classes, by autoloading the parent class every time an object of the child class is instantiated? This way I would not have to define multiple classes with the same code?

E.g.

class ParentClass {
    public function __construct() {
        switch(get_class($this)) {
            case "ChildClass1" : do_stuff() break;
            case "ChildClass2" : do_other_stuff() break;
            default: break;
        }
    }
}

$c1 = new ChildClass1();
$c2 = new ChildClass2();

...and have only one file ParentClass.php (no separate files ChildClass1.php or ChildClass2.php).

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往昔成烟 2024-10-01 09:30:14

你为什么不这样做呢？

class ParentClass {
  public function __construct()
  {
    $this->do_stuff();
  }
}

class SpecializedClass
  extends ParentClass
{
  public function __construct()
  {
    // Optional, do the stuff parent does (do_stuff());
    parent::__construct();
    // ... specialized construction logic here
    $this->do_other_stuff();
  }

  // ... specialized methods here.
}

class NormalClass1
  extends ParentClass
{

}

class SpecialClass1
  extends SpecializedClass
{

}

// ... etc.

Why don't you just do this?

class ParentClass {
  public function __construct()
  {
    $this->do_stuff();
  }
}

class SpecializedClass
  extends ParentClass
{
  public function __construct()
  {
    // Optional, do the stuff parent does (do_stuff());
    parent::__construct();
    // ... specialized construction logic here
    $this->do_other_stuff();
  }

  // ... specialized methods here.
}

class NormalClass1
  extends ParentClass
{

}

class SpecialClass1
  extends SpecializedClass
{

}

// ... etc.

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