Sorry, I've forgotten the "extends" keywords in the example codes:
<?php
abstract class Dispatcher {
abstract public static function dispatch();
public static function exampleMethod() {
...
}
}
final class ActionDispatcher extends Dispatcher {
public static function dispatch() {
parent::exampleMethod();
// other code...
}
}
final class AjaxDispatcher extends Dispatcher {
public static function dispatch() {
parent::exampleMethod();
// other code...
}
}
?>
2007/4/5, Jingcheng Zhang <diogin@gmail.com>:
>
> Hi internals,
> I used to use abstract static function prior to php 5.2, because when
> I consider static class as a singleton, I can use abstract static function
> to delay the implementation of some methods to the derived classes. This
> happens, for example, when I declare a parent dispatcher, and extend it into
> two classes - action dispatcher and ajax dispatcher - and declare them
> static as I want to keep them a singleton because they are just application
> models, not domain models:
>
> <?php
> abstract class Dispatcher {
> abstract public static function dispatch();
> public static function exampleMethod() {
> ...
> }
> }
> final class ActionDispatcher {
> public static function dispatch() {
> parent::exampleMethod();
> // other code...
> }
> }
> final class AjaxDispatcher {
> public static function dispatch() {
> parent::exampleMethod();
> // other code...
> }
> }
> ?>
> Unfortunately, since php 5.2, although it does still allow declaring
> static methods in an interface, it simply generates a message when declaring
> abstract static functions with error_reporting set to E_ALL | E_STRICT.
> PHP is a dynamic language, not static as C++ and Java. So, why not
> allow abstract static functions? It is also a good way to support singleton
> natively.
> Waiting for explanations. Thanks :)
>
> --
> Best regards,
> Jingcheng Zhang
> Room 304, Dormitory 26 of Yuquan Campus, Zhejiang University
> P.R.China
--
Best regards,
Jingcheng Zhang
Room 304, Dormitory 26 of Yuquan Campus, Zhejiang University
P.R.China
