Hum, pretty good! I was just thinking about it and found that this is very great a progress to PHP language, because, as you must know most languages, both scripting or not have method chaining somehow, to webdevelopers it would be pretty nice for PHP allow method chaining, in fact we generally deal with Javascript often, and as you know too, string.value.length is now possible in php as string()->value()->length().
Great post, thanks again!