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Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? [message #185027 is a reply to message #185026]

Mon, 24 February 2014 21:16

kurtk(at)pobox(dot)com
Messages: 10
Registered: May 2012

Karma:

Junior Member

Evidently, PHP just works differently. Even though Quackologist::update(\SplSubject) takes a reference to \SplSubject, this fine provide you pass (at runtime) a class derived from SplSubject that implements whoami(). Only if were to pass an SplSubject instance that does not implement whoami() will you get an runtime error.

C++, on the other hand, would complain

error: no member named 'whoami' in 'Base'

because Base has no whoami() method.

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[Message index]

		Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: kurtk(at)pobox(dot)com on Mon, 24 February 2014 19:49
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: kurtk(at)pobox(dot)com on Mon, 24 February 2014 21:16
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Robert Heller on Tue, 25 February 2014 02:43
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Thomas 'PointedEars' on Tue, 25 February 2014 03:25
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Jerry Stuckle on Tue, 25 February 2014 05:00
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Daniel Pitts on Tue, 25 February 2014 23:00
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Jerry Stuckle on Wed, 26 February 2014 02:11
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Daniel Pitts on Wed, 26 February 2014 17:53
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: kurtk(at)pobox(dot)com on Thu, 27 February 2014 20:08
		Re: Why is polymorphism in PHP not like other languages? Is there a bug in PHP? By: Thomas 'PointedEars' on Thu, 27 February 2014 22:06

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