Variable variable class extensions in PHP--is it possible?

Question

Is something like the following possible in PHP?

$blah = \'foo1\';

class foo2 extends $blah {
    //...
}

class foo1 {
    //...
}

This g

Answer 1

I know this question was asked a long time ago, but the answer is relatively simple.

Assuming you want to extend class foo if class foo exists, or class bar if it doesn't, you'd use:

if(!class_exists('foo')) {
    class foo extends bar {
        function __construct() {
            parent::__construct();
        }
    }
}

class myclass extends foo{
    //YOUR CLASS HERE
}

Answer 2

you should have tried $$

$blah = 'foo1';
class foo2 extends $$blah {
    //...
}

class foo1 {
    //...
}