|
|
Posted by Matthew Weier O'Phinney on 04/09/05 22:02
* Hanez <mailman@hanez.org>:
> On Friday 08 April 2005 20:22, Matthew Weier O'Phinney wrote:
> > * Johannes Findeisen <mailman@hanez.org>:
> > > If i understand right, all variables should be declared in PHP5. So
> > > why is it possible to add a membervariable called "c" to the object
> > > without making a declaration? I got no error with this. I thought
> > > E_STRICT should show me things like that. Could someone explain me
> > > that?
> >
> > You don't understand correctly. Class properties/attributes do not need
> > to be explicitly declared in PHP. This did *not* change in PHP5. What
> > changed in PHP5 is visibility. By default, unless declared otherwise, a
> > class attribute is publicly visible -- the same behaviour seen in PHP4.
>
> Okay, allright. I missunderstood that. But wouldn't it be nice to see things
> like this in the error log when E_STRICT is activated. I know some
> programming languages and i ever have dreamed about some features like this
> in PHP5 and the main thing i was dreaming about was strict declaration. Now
> since PHP5 i have thought about programming PHP again because of features
> which would help me debugging my code. And this is not implemented perfectly.
E_STRICT doesn't catch it because it's not considered bad behaviour;
this is perfectly legal behaviour according to the PHP parser.
PHP doesn't have the same scoping issues as, say, Perl. Variables in PHP
do *not* need to be pre-declared (though testing for a value on an
undeclared variable, be it in a class or otherwise, *will* generate an
E_NOTICE). This is a *difference* in PHP from other languages, and
likely exists for a reason. If you want to know why it exists that way,
or feel it should be changed, you should probably go over to the php-dev
list.
--
Matthew Weier O'Phinney | WEBSITES:
Webmaster and IT Specialist | http://www.garden.org
National Gardening Association | http://www.kidsgardening.com
802-863-5251 x156 | http://nationalgardenmonth.org
mailto:matthew@garden.org | http://vermontbotanical.org
Navigation:
[Reply to this message]
|