On Fri, Jul 10, 2009 at 10:57:22AM -0400, Alban wrote:
> Le Fri, 10 Jul 2009 14:23:24 +0100, Alain Williams a écrit :
>
> > On Fri, Jul 10, 2009 at 08:45:55AM -0400, Alban wrote:
> >> Hello all,
> >>
> >> I don't understand why you focus on " Strict / Weak " question.
> >
> > It is really about:
> >
> > * type checking and enforcement
> > or
> > * type casting and generation of an error if the value cannot be
> > converted cleanly
>
> Thank for your response !
>
> I vote for throw an exception if data type won't match. Have one error
> when you make a mistake is better than have a silently casting which can
> transform your data in another form than what you want.
I think that we need both.
* Strict enforcement is useful.
* Doing silent type casting can be useful, a naive example is:
is_child($_GET['age'])
The GET argument here should always be integer, however if it is in $_GET
it will be a string.
NB: I am not advocating the above to be a way of avoiding checking what there is
in $_GET - however many PHP users will use it as such. If casting (with errors)
help to avoid silent errors - then so much the better.
> And Exception is better than an Error because this give one chance to
> programmer for resolving the problem before program be halted.
Not everyone understands try/catch. Perhaps a user supplied
function_argument_error()
could be called if not in a try/catch block.
--
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT
Lecturer.
+44 (0) 787 668 0256 http://www.phcomp.co.uk/
Parliament Hill Computers Ltd. Registration Information:
http://www.phcomp.co.uk/contact.php
Past chairman of UKUUG: http://www.ukuug.org/
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