从另一个类 PHP 调用函数中的函数 [英] Call function in function from another class PHP

问题描述

我在 Stackoverflow 上阅读了一些关于抽象类的主题，我认为这正是我所需要的，但我无法直接说明.

I have read a few threads about abstract class here at Stackoverflow and I think it's what I need, but I can't get the declaration straight.

我想要做的是调用function2(在classB 中)在function1 中(在classA 中).

What I want to do is to call a function2 (in classB) in a function1 (in classA).

我该怎么做?

推荐答案

如果只需要从 ClassA 访问 ClassB 的方法，而不需要两者之间的父子关系，那么静态方法可能更合适:

If you only need to access ClassB's method from ClassA but don't need a parent-child relationship between the two, a static method may be more appropriate:

class ClassA
{
  public function method1() {
    echo ClassB::method2();
  }
}

class ClassB
{
  public static function method2() {
    return 'WOOT!';
  }
}

$cls_a = new ClassA();
$cls_a->method1();

// or alternatively, you don't even need to instantiate ClassA
echo ClassB::method2();

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