#34936 [NEW]: Base methods influenced by masking in derived classes
| From: | pa-engineer at web dot de | Date: | Thu, 20 Oct 2005 17:36:36 +0000 |
| Subject: | #34936 [NEW]: Base methods influenced by masking in derived classes | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-86827@lists.php.net to get a copy of this message | ||
From: pa-engineer at web dot de
Operating system: WinXP
PHP version: 5.0.5
PHP Bug Type: Class/Object related
Bug description: Base methods influenced by masking in derived classes
Description:
------------
Dieser Effekt hat weitreichende Konsequenzen für die Funktionstüchtigkeit
von Methoden die wiederum Methoden desselben Objektes aufrufen, die unter
dem Einfluss der Ableitung modifiziert werden könnten.
Anstelle dessen: Basismethoden rufen auch Basismethoden auf, unberührt von
einer Verdeckung durch eine abgeleitete Klasse.
This Effect has a wide range of consequences in functionality of base
methods whitch call methods of the same object, perhaps influenced by
using modifikation in derived classes.
Instead: base methods simply call base methods, untoughed by using a mask
in derived classes.
Reproduce code:
---------------
class Class_A
{
public function Do_Something()
{
$this->Class_A_Method();
}
public function Class_A_Method()
{
echo "Class_A";
}
}
class Class_B extends Class_A
{
public function Class_A_Method()
{
echo "Class_B";
}
}
$Instance = new Class_B();
$Instance->Do_Something();
Expected result:
----------------
Die Ausgabe hier ist offensichtlich "Class_B".
Meine Erwartung, wie auch in anderen Sprachen: "Class_A".
The Output in this case here is obviously "Class_B"
My expectation, such as in other languages: "Class_A".
--
Edit bug report at http://bugs.php.net/?id=34936&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=34936&r=trysnapshot4
Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=34936&r=trysnapshot50
Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=34936&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=34936&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=34936&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=34936&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=34936&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=34936&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=34936&r=support
Expected behavior: http://bugs.php.net/fix.php?id=34936&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=34936&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=34936&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=34936&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=34936&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=34936&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=34936&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=34936&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=34936&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=34936&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=34936&r=mysqlcfg