PHP static context refers to the wrong class - oop

Question

I have some php code in a site that I'm trying to move to a different server (from development into production) similar to the following:
class test1 {
static function make () {
$object = static::maker(function( $params ) {
return new static($params);
});
return $object;
}
protected static function maker ( $callable ) {
$params = [/*...*/];
return $callable( $params );
}
}
class test2 extends test1 {
function sayhi () {
echo "Hello! from: ".get_called_class();
}
}
$test = test2::make();
$test->sayhi();
My development environment is OSX 10.9 running php 5.5.17 and nginx with php-fpm, and my production environment is Ubuntu 14.04.1 LTS running php 5.5.11 and nginx with php-fpm.
on my development machine I get the expected result:
Hello! from: test2
but on the production server it throws an error:
PHP message: PHP Fatal error: Call to undefined method test1::sayhi()
revealing that the static context is pointing to test1 which isn't expected.
The workaround I came up with is to call the function like this:
$class = get_called_class();
$object = static::maker(function( $params ) use ( $class ) {
return new $class($params);
});
My question is: Why is it different between versions? And can someone shed some light on what's the expected behavior?
Thanks!

Answer 1

I found the answer to my question: late static bindings.
https://bugs.php.net/bug.php?id=67774
http://php.net//manual/en/language.oop5.late-static-bindings.php