Let's talk about variable function calls

Hi,

http://3v4l.org/PaKsD
http://3v4l.org/pqZdR

I do not know what is the expected result but the result definitely is
different between Zend and HHVM (which gets a cookie for running this...).

So what's the standard for

$x = array(get_class(), "self:foo");
$x();
call_user_func($x);

Best,

ChX