Re: [PHP-DEV] PHP 4.0 Bug #2675 Updated: Misbehavior of object initializers From: Andi Gutmans (andi <email protected>)
Date: 11/07/99

At 03:41 PM 11/7/99 -0600, ZeroDiVide wrote:
> > > > You should use the Factory design pattern I suppose. How about the
> > > following:
> > > >
> > > > And then do something like (actually it doesn't even need to be
> > > > $new_db = DB::Factory('mysql');
>
>I had to check some references, but in java or other oop languages where
>the "factory" design pattern are used the object instaciator actually is
>completly overloading which is thecnically a "feature" of those languages
>vs c++.
>
> > > >So i guess the larger question here is are we doing java symantics or
> > >c++ ?
> >
> > PHP semantics :) I'm not sure what you can do in Java with constructors,
> > but in this case, PHP is similar to C++.
>Is there a design paper or anything that shows where things are headed
>with the oop side of things?

Actually we never intended to make PHP a completely OOP language. We added
some support to allow creation of self contained packages. We are not at
this time heading in a completely OOP direction. Most PHP users still
prefer to write simple procedural programs for their web sites than OO
programs.

> > No it isn't. The point of overloading a constructor is to initialize the
> > object ($this) with whatever default values you want. If you're doing
> > inheritance and you need a new constructor for the offspring class, you
> > might want to call the parent's constructor in addition to the added code
> > of your new constructor. It's up to the developer to decide what
> exactly he
> > wants to do.
>
>Right but wouldn't it be easy to have the function default to returning
>$this and if you don't want to or you want to polymorph into something
>else you'll return a different object reference or whatever you'd like.

No, because not all classes have constructors. Anyway, I really don't see a
point of allowing this and it sounds pretty odd to me that some other
languages do allow it. Also, there really is no problem with the code I
sent you. Why not use that?

Andi 

---
Andi Gutmans <andi <email protected>>
http://www.zend.com/

-- 
PHP Development Mailing List <http://www.php.net/>
To unsubscribe, e-mail: php-dev-unsubscribe <email protected>
For additional commands, e-mail: php-dev-help <email protected>
To contact the list administrators, e-mail: php-list-admin <email protected>