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Re: php 5 classes: public, protected and private

Posted by Buddy on 12/01/06 13:51

Python does what LISP does with better syntax. So I would say Python
bets both LISP and PHP and with mod_python (for Apache), maybe you
should learn it.

Tony Marston wrote:
> "Jerry Stuckle" <jstucklex@attglobal.net> wrote in message
> news:n9GdnZYmX_-4EfDYnZ2dnUVZ_q-dnZ2d@comcast.com...
> > Tony Marston wrote:
> >> "Jerry Stuckle" <jstucklex@attglobal.net> wrote in message
> >> news:bpudnWTDrLPbNPHYnZ2dnUVZ_tudnZ2d@comcast.com...
> >>
> >>>Tony Marston wrote:
> >>>
> >>>>"Jerry Stuckle" <jstucklex@attglobal.net> wrote in message
> >>>>news:PeudnRKltLJsufHYnZ2dnUVZ_u2dnZ2d@comcast.com...
> >>>>
> >>>>
> >>>>>Tony Marston wrote:
> >>>>>
> >>>>>
> >>>>>>"Jerry Stuckle" <jstucklex@attglobal.net> wrote in message
> >>>>>>news:j9-dnQB80fVLOvbYnZ2dnUVZ_rOdnZ2d@comcast.com...
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Tony Marston wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>"Jerry Stuckle" <jstucklex@attglobal.net> wrote in message
> >>>>>>>>news:Ib6dna_BtYQSifbYnZ2dnUVZ_sSdnZ2d@comcast.com...
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>>jopperdepopper wrote:
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>>>You should read "can be accessed everywhere".
> >>>>>>>>>>>
> >>>>>>>>>>>Private members can be accessed by members of the class only.
> >>>>>>>>>>>Protected members can be accessed by members of the class or a
> >>>>>>>>>>>derived
> >>>>>>>>>>>class.
> >>>>>>>>>>>Public members can be accessed by anyone, including other
> >>>>>>>>>>>classes,
> >>>>>>>>>>>functions and any other code.
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>Thanks Jerry. I'm trying to make a bit of sense of the php 5
> >>>>>>>>>>approach
> >>>>>>>>>>to classes, and so far having a hard time. I fail to see the 'why'
> >>>>>>>>>>behind the 'public, protected and private' and stuff like
> >>>>>>>>>>abstraction,
> >>>>>>>>>>interfaces and whatnot.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>Intefaces are not necessary in PHP. Once you have defined a method
> >>>>>>>>it is a total waste to time to also define an interface. Interfaces
> >>>>>>>>are a "fix" in those languages as a means of dealing with optional
> >>>>>>>>arguments and statyic typing. PHP has ifferent ways of dealing with
> >>>>>>>>bth of these, therefore interfaces serve no useful purpose.
> >>>>>>>>
> >>>>>>>
> >>>>>>>Ah, the great Tony Marston is back to trolling again.
> >>>>>>>
> >>>>>>>Wrong. In OO terms, the interface is the way to interact with the
> >>>>>>>object. It consists of all public members - both methods (functions,
> >>>>>>>in PHP) and variables. And for derived classes, the base class adds
> >>>>>>>protected members.
> >>>>>>>
> >>>>>>>A PHP interface is something entirely different.
> >>>>>>
> >>>>>>
> >>>>>>I disagree. It is possible to define a function (method) within a
> >>>>>>class,
> >>>>>>then to define a separate thing called an "interface". It is possible
> >>>>>>access
> >>>>>>the function without using the interface, therefore the interface is
> >>>>>>not
> >>>>>>necessary.
> >>>>>>
> >>>>>
> >>>>>Tony,
> >>>>>
> >>>>>You really need to learn about OO before spouting off. In OO terms, an
> >>>>>interface is something entirely different than a PHP interface.
> >>>>
> >>>>
> >>>>How so? All the documentation I have seen describes how an interface
> >>>>simply describes a method which it imlements. If it is possible to
> >>>>access a method (a function in PHP) without going though an interface,
> >>>>ten an interface is not necessary in any language.
> >>>>
> >>>
> >>>You need to understand the difference between an interface as described
> >>>in OO terms and the PHP interface.
> >>>
> >>>The PHP interface defines a set of methods (function) which are required
> >>>by the classes which implement the interface. Java is similar in that
> >>>respect. But both are a subset of the total interface.
> >>
> >>
> >> It is possible to access the method directly without an interface,
> >> therefore an interfae is not necessary.
> >>
> >
> > "Possible" != "CORRECT"
>
> That's just your opinion. Where does it say that I *MUST* define and use an
> interface before I can access a class method? Interfaces are optional
> (especuially in PHP) so it is not wrong to excercise the option NOT to use
> them. I can define a class method and access that method without using an
> interface, and that is what I choose to do.
>
> --
> Tony Marston
> http://www.tonymarston.net
> http://www.radicore.org

 

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