From: a dot dotreppe at aspyct dot org
Operating system: Windows Vista 32bit
PHP version: 5.3.0
PHP Bug Type: Feature/Change Request
Bug description: Default arguments on interface implicitly passed to
implementing classes
Description:
------------
Hi,
The aim of interfaces is to provide the same external behavior, no matter
what class implements it.
Maybe it would be nice for interfaces to be able to force a default value
for argument on implemented methods.
Moreover, that way we could change all method's default argument by
modifying it on one place only: the interface.
Reproduce code:
---------------
interface Fetchable {
const FETCH_ASSOC = 1;
function fetch($fetchStyle=self::FETCH_ASSOC);
function fetchAll($fetchStyle=self::FETCH_ASSOC);
}
class PDOLayerStatement implements Fetchable {
/* This one works fine, but I have to know the default value on
interface,
* and even reference the interface,
* which will raise the amount of maintenance work
*/
public function fetch($fetchStyle=Fetchable::FETCH_ASSOC);
/* These two won't work, sadly :( */
public function fetch($fetchStyle) {}
public function fetchAll($fetchStyle) {}
}
Expected result:
----------------
It would be nice if PHP could automatically give Fetchable::FETCH_ASSOC as
default value for $fetchStyle in every implementing class.
Actual result:
--------------
Fatal error: Declaration of PDOLayerStatement::fetch() must be compatible
with that of Fetchable::fetch() in C:\xampp\htdocs\aspyct\src\test.php
--
Edit bug report at http://bugs.php.net/?id=49261&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=49261&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=49261&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=49261&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=49261&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=49261&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=49261&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=49261&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=49261&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=49261&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=49261&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=49261&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=49261&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=49261&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=49261&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49261&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=49261&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=49261&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=49261&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=49261&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=49261&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=49261&r=mysqlcfg
