Class Arg.

[Muazam]

Does openable get ignored? if not what does it do?

function openSomething(openable $obj) {
		$obj->open();
	}

openable is a class btw. taken from a book.

[Muazam]

bump

[rajarajan2017]

I hope it is correct. you passing the obj as an reference.

[pritaeas]

http://php.net/manual/en/functions.arguments.php

See the first user comment. The syntax means that the first parameter is a type or class called openable.

[Muazam]

Thanks.