Edit report at http://bugs.php.net/bug.php?id=53081&edit=1
ID: 53081
Updated by: rasmus@php.net
Reported by: giorgio dot liscio at email dot it
Summary: why you should bring back abstract static methods
-Status: Open
+Status: Bogus
Type: Feature/Change Request
Package: Class/Object related
PHP Version: 5.3.3
Block user comment: N
New Comment:
A static method belongs to the class, not to an instance of that class
and since
you can't have an instance of an abstract class, static methods make no
sense in
abstract classes. It is really that simple.
Previous Comments:
------------------------------------------------------------------------
[2010-10-16 06:58:55] giorgio dot liscio at email dot it
sorry, corrected code:
abstract class FSItem
{
protected function __construct($path){}
// random per-item singleton
public static function getByPath($path)
{
if(static::isPathValid($path)) // here is the static method
call of classes. i want to check the path before instance it
return new static($path);
}
// abstract static method:
abstract protected static function isPathValid($path);
}
class Dir extends FSItem
{
//implementation:
protected static function isPathValid($path)
{
return is_dir($path);
}
}
class File extends FSItem
{
//implementation:
protected static function isPathValid($path)
{
return is_file($path);
}
}
class Image extends File
{
//implementation:
protected static function isPathValid($path)
{
return (bool)getimagesize($path);
}
}
------------------------------------------------------------------------
[2010-10-16 06:55:35] giorgio dot liscio at email dot it
Description:
------------
hi, i really can not understand why this was dropped, but imagine this
code
please read carefully and please examine my request before trash it
abstract class FSItem
{
// abstract static method:
abstract protected function isPathValid($path);
protected function __construct($path){}
// random per-item singleton
public static function getByPath($path)
{
if(static::isPathValid($path)) // here is the static method
call of classes. i want to check the path before instance it
return new static($path);
}
}
class Dir extends FSItem
{
//implementation:
protected function isPathValid($path)
{
return is_dir($path);
}
}
class File extends FSItem
{
//implementation:
protected function isPathValid($path)
{
return is_file($path);
}
}
class Image extends File
{
//implementation:
protected function isPathValid($path)
{
return (bool)getimagesize($path);
}
}
php changelog says:
Dropped abstract static class functions. Due to an oversight, PHP 5.0.x
and 5.1.x allowed abstract static functions in classes. As of PHP 5.2.x,
only interfaces can have them.
oversight what? it is a logical error? technical limitation?
thank you
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=53081&edit=1