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Subject: Re: [PHP-DEV] Implementing interface method with child class in parameter
 def (Bug #42330)
From: rowan.collins@gmail.com (Rowan Collins)

Christian Stoller wrote (on 17/09/2014):
> I'd say that it is absolutely legal to define a more specialized
> type in a child or implementing class, or would this have any bad
> side effects?

Here is a StackOverflow question discussing exactly this issue, which 
includes why you can't do that with an interface contract, and some 
suggestions on what you might want to do instead: 
http://stackoverflow.com/q/21665795/157957

-- 
Rowan Collins
[IMSoP]