I am just starting out with PHP, and I am wondering if there is a way to add an anonymous function to a class instance.

For instance, lets say...

class A{
    public B;
}

$c = new A();

//This is where I am getting a little confused...
//The following wont work

$c->B = function(){echo('HelloWorld');};
$c->B();

What I am hoping to do is reuse the same spit of code in a great number of different applications, and make it so that I can just 'swap-out' and replace functions in specific instances.

I am using php5.3 (so anonymous functions should work, just not in the way that I am using them).

Thanks so very much for your time!!

-GK