Re: [PHP4BETA] Re: [PHP3] OO

On Mon, 9 Aug 1999, Zeev Suraski wrote: > At 12:29 09/08/99 , Stig Bakken wrote: > >On Tue, 3 Aug 1999, Zeev Suraski wrote: > > > > > At 21:46 03/08/99 , Sander Pilon wrote: > > > >Is, or will there be, support for the following things in php3 or php4? > > > > > > > >Class constructors/desctructors? > > > >(I think there are constructors) > > > > > > There are constructors, due to the way PHP 4.0 works (reference counted > > > operation) destructors don't make much sense. > > > >You are assuming that the destructor would only free allocated resources. > >If you want to do something else in a destructor, such as flushing changes > >to a database, destructors are useful. It can of course be implemented in > >userland, but it's not exactly something that would be taught in CS > >courses :-) > > I'm not really assuming anything - regardless of what you do in the > destructor code, there's simply no right way to do it the way PHP is > implemented; It will either be called too many times, too few times, or on > the wrong object, completely independent of what you actually perform in > the destructor. I have no problems accepting the answer "not technically feasible". But you have a very good track record of pulling off features that you earlier described as "extremely difficult" or "almost impossible". :-) - Stig