PHP:get_drawn_class()与get_class($ this) [英] PHP: get_called_class() vs get_class($this)

问题描述

在PHP中 get_called_class() 有什么区别和 get_class($this) (在实例内部使用)?

In PHP what is the difference between get_called_class() and get_class($this) when used inside an instance?

示例:

class A {
    function dump() {
        echo get_called_class();
        echo get_class($this);
    }
}

class B extends A {}

$A = new A();
$B = new B();

$A->dump(); // output is 'AA'
$B->dump(); // output is 'BB'

在这种情况下有什么区别吗?

Is there any difference in this case?

我什么时候应该使用一个或另一个get_called_class()或get_class($this)?

When should I be using one or the other get_called_class() or get_class($this)?

推荐答案

在这种情况下没有区别，因为$this始终指向使用get_class()解析类名的正确实例.

In this case there's no difference, because $this always points to the correct instance from which the class name is resolved using get_class().

函数get_called_class()用于静态方法.重写静态方法时，此函数将返回提供正在调用的当前方法的上下文的类名称.

The function get_called_class() is intended for static methods. When static methods are overridden, this function will return the class name that provides the context for the current method that's being called.

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