In PHP 5 can I instantiate a class dynamically?

Question

Is it possible to dynamically instantiate a class using a variable? For example is something like this possible in PHP?

class foo
{
    public $something;
}

$class_name = "foo";

$f = new $class_name();

Answer 1

That should work, yes.

You can also do:

$f = new $class($arg1,$arg2); 

Answer 2

Yes, this code will work fine.

Answer 3

In PHP 5 can I instantiate a class dynamically?

Yes you can, your code should work fine.