On Mon, Apr 19, 2010 at 10:25 AM, Peter Lind <peter.e.lind@xxxxxxxxx> wrote: > On 19 April 2010 16:18, Gary . <php-general@xxxxxxxxxxxxxxx> wrote: > > On Mon, Apr 19, 2010 at 2:37 PM, Peter Lind <peter.e.lind@xxxxxxxxx> > wrote: > >> On 19 April 2010 14:24, Gary wrote: > >>> On Mon, Apr 19, 2010 at 10:36 AM, Peter Lind wrote: > > > >>>> So no, you shouldn't be able to do that. > >>> > >>> Okay. Why not? > >> > >> Hate to ask, but did you at any point consider to read the PHP docs on > >> this? The bit I sent or what you could gather from the link posted? > > > > Yes. The question remains. > > > > Per the PHP manual: "The value must be a constant expression". Is > something that depends on other classes, variables or functions > constant? > If you're asking why a constant should be constant, I can only point > you to Ashleys answer or google. > > Regards > Peter > > -- > <hype> > WWW: http://plphp.dk / http://plind.dk > LinkedIn: http://www.linkedin.com/in/plind > Flickr: http://www.flickr.com/photos/fake51 > BeWelcome: Fake51 > Couchsurfing: Fake51 > </hype> > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > Hi Gary, Sorry for the confusion. I understand your question. For the life of those variables, they would never change If you come from other programming language backgrounds, this can be a bit confusing. In Objective C, the term "constant expression" is one in which every element is a constant, so given the requirement that "The value must be a constant expression", your examples would make sense. Additionally, in languages like Scala, values default to a constant, and you can compose them in a myriad of ways. I don't claim to know the rationale, but once you get used to it, it's not a big deal. I just tend to use classes that allow a value to be set once and only once for these types of situations. Happy coding ;) Adam -- Nephtali: PHP web framework that functions beautifully http://nephtaliproject.com
