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Date: Tue, 29 Apr 2008 18:28:59 +0200
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Thread-Topic: Re: [PHP-DEV] Class Properties in Interfaces?
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To: <internals@lists.php.net>
Subject: RE: Re: [PHP-DEV] Class Properties in Interfaces?
From: johncart@cisco.com ("John Carter -X (johncart - PolicyApp Ltd at Cisco)")

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Nathan,
=20
By example:
=20
interface EggLayer
=20
{
    public $eggsLaid;
}
=20
class Chicken implements EggLayer;
=20
Some would say (and maybe I would too) that you should have a
getEggsLaid() method, that's fair enough. But why not the above?
=20
You say interfaces can't have properties because they require instance
variables. Why do they require instance variables? I also think for the
purposes of this discussion, property and instance variable mean the
same thing.
=20
John.

________________________________

From: Nathan Nobbe [mailto:quickshiftin@gmail.com]=20
Sent: 29 April 2008 17:14
To: John Carter -X (johncart - PolicyApp Ltd at Cisco)
Cc: internals@lists.php.net
Subject: Re: Re: [PHP-DEV] Class Properties in Interfaces?


On Tue, Apr 29, 2008 at 9:51 AM, John Carter -X (johncart - PolicyApp
Ltd at Cisco) <johncart@cisco.com> wrote:


	The article explicitly mentions OOP interfaces in a few
languages.


my bad.
=20

	But
	the article, or for that matter any formal definition of an
interface
	isn't really what I asked about:
=09
	My question was simply: why can't interfaces have properties?


when you say properties, do you mean a particular set of methods map to
a particular instance variable, as getters and setters (i saw that
definition from Sebastian earlier)?  if thats the case than interfaces
cant have properties because they require instance variables.

-nathan


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