Re: Inheritance and a class function: on what class was it called?

I have just double checked my facts and in both Java and C++ you cannot access members of an ordinary class without first instantiating the class. In both cases the only way you can do so is if that class contains a member specifically declared as being special ie a class member as opposed to an instance member & specifically declared to be static. PHP on the other hand will let you access any functions of any class without instantiation. Maybe this is because, as I said before, PHP has no concept of the different class/var/method types usually associated with classes. This is all very different to what I know and does (is) causing confusion. Debbie ----- Original Message ----- From: "Debbie Dyer" <debbie.dyer@c-u-online.co.uk> To: "Rasmus Lerdorf" <rasmus@php.net> Cc: <php-general@lists.php.net> Sent: Wednesday, October 02, 2002 11:41 PM Subject: Re: [PHP] Inheritance and a class function: on what class was it called? > Without them being defined in some special way? > > I am very surprised that after 7 years of OOP I dont know that but I will > check it out tomorrow. > > Debbie > > ----- Original Message ----- > From: "Rasmus Lerdorf" <rasmus@php.net> > To: "Nick Eby" <nick_eby@bonzidev.com> > Cc: "Debbie Dyer" <debbie.dyer@c-u-online.co.uk>; > <php-general@lists.php.net> > Sent: Wednesday, October 02, 2002 11:28 PM > Subject: Re: [PHP] Inheritance and a class function: on what class was it > called? > > > > Since static method calls are completely disconnected from any class > > instance asking which class the method call is from is rather meaningless, > > and no, I don't think there is any way to get that. > > > > -Rasmus > > > > On Wed, 2 Oct 2002, Nick Eby wrote: > > > > > PHP allows static method calls... But back to my original question... > > > inside a method that has been called statically, can I determine for > what > > > class the method was called? Again, obviously the question is only > > > applicable if there is some inheritance involved, and the child class > does > > > not declare the method in question. Below is my original example > spelled > > > out in code... the call to get_class is not valid since there won't be a > > > $this variable in the context of the static method... Can I replace it > with > > > something that will cause it to echo "B"? > > > > > > Class A { > > > function staticFunc() { echo get_class($this); } > > > } > > > > > > Class B extends A {} > > > > > > B::staticFunc(); > > > > > > thanks again > > > /nick > > > > > > ----- Original Message ----- > > > From: "Rasmus Lerdorf" <rasmus@php.net> > > > To: "Debbie Dyer" <debbie.dyer@c-u-online.co.uk> > > > Cc: "Nick Eby" <nick_eby@bonzidev.com>; > > > <php-general@lists.php.net> > > > Sent: Wednesday, October 02, 2002 3:08 PM > > > Subject: Re: [PHP] Inheritance and a class function: on what class was > it > > > called? > > > > > > > > > > > The mistake is mine not yours. I know about the :: operator I use it > all > > > the > > > > > time (but within classes parent::function() etc) - but I never > realised > > > > > until now that PHP will let you use any class before instantiation > (and > > > > > nearly all my PHP work uses classes). I have never even attempted to > try > > > it > > > > > because in all other languages I know trying to use an ordinary > class > > > before > > > > > instantiation will just result in a null pointer error or the > equivalent > > > of > > > > > one. > > > > > > > > > > PHP OOP is different I know, one big example is that there is no > > > provision > > > > > for data encapsulation - one of the main objectives of OOP, neither > can > > > you > > > > > differentiate between types of classes/methods (which is probably > what > > > is > > > > > causing the confusion). > > > > > > > > > > Now it seems it is even more different than I thought. All I can say > is > > > > > mmhh....... > > > > > > > > Most OO languages allow static method calls. C++, Java, Python, Ruby, > > > > etc. PHP may have some OO differences, but this is not one of them. > > > > > > > > -Rasmus > > > > > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >