Question

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

Answer 1

You can use the __call magic function for this job. Not a beauty, but it works..

like this:

class A {
    public $B;

    public function __call($closure, $args)
    {
        call_user_func_array($this->$closure, $args);
    }
}

$c = new A();

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