从另一个类 PHP 调用函数中的函数
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Call function in function from another class PHP
提问by Fredrik
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.
我在 Stackoverflow 上阅读了一些关于抽象类的线程，我认为这正是我所需要的，但我无法直接得到声明。
What I want to do is to call a function2(in classB) in a function1(in classA).
我想要做的是在函数1（在类A中）调用函数2（在类B中）。
How should I do this?
我该怎么做？
回答by rdlowrey
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:
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：
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();
