php call class function by string name

Question

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

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');

Answer 1

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'));

You can also do it without call_user_func:

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

Or:

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