php通过字符串名称调用类函数 [英] php call class function by string name

问题描述

如何通过其名称调用普通(非静态)类函数?

How can I call a normal (not static) class function by its name?

下面给出一个错误，指出参数1必须是有效的回调.我不希望函数是静态的，我希望它是普通的函数，到目前为止，我所看到的所有示例都将它们设为静态.

The below gives an error saying param 1 needs to be a valid callback. I don't want the function to be static, I want it to be a normal function, and all the examples I've seen so far had them static.

class Player
{
    public function SayHi() { print("Hi"); }
}

$player = new Player();

call_user_func($Player, 'SayHi');

推荐答案

callback 语法在PHP中有点奇怪.您需要做的是创建一个数组.第一个元素是对象，第二个元素是方法.

The callback syntax is a little odd in PHP. What you need to do is make an array. The 1st element is the object, and the 2nd is the method.

call_user_func(array($player, 'SayHi'));

您也可以在没有call_user_func的情况下这样做:

You can also do it without call_user_func:

$player->{'SayHi'}();

或者:

$method = 'SayHi';
$player->$method();

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