Recuerda mucho a Javascript y frameworks tipo jQuery, para ello utiliza métodos encadenados y un objeto genérico:   // Define a new class $animal = $class->new() ->def(’init’, function($t, $name) { $t->name = $name; }) ->def(’speak’, function($t) { echo “My name is $t->name\n”; });   // Extend a class $dog = $animal->extend() ->def(’speak’, function($t) { echo [...]