From: atrauzzi at gmail dot com
Operating system: Linux
PHP version: 5.3.0
PHP Bug Type: Class/Object related
Bug description: Subclass property behaviour of questionable use...
Description:
------------
Subclass properties should be duplicated from the parent class, not passed
through to the parent class.
The current behaviour is redundant and possibly misleading. Especially
with the great selection of scopes in PHP (parent::, static::, self::).
The current workaround is to dump everything into an array on the parent,
keyed by subclass. This knocks out cohesive design and restricts the
potential for some fairly neat designs.
At the very least - to prevent accidental misuse - a subclass should be
throwing an error when trying to access a property that doesn't exist, but
does exist on a parent.
Really what should be happening though, is a child should be getting its
own copy of each property defined in the parent.
Reproduce code:
---------------
abstract class Parent {
protected static $message = "UNTOUCHED";
public static function yeah() {
static::$message = "YEAH";
}
public static function nope() {
static::$message = "NOPE";
}
public static function lateStaticDebug() {
return(static::$message);
}
}
class Child extends Parent {
}
Expected result:
----------------
Parent::yeah();
Parent::lateStaticDebug(); // Return "YEAH"
Child::nope();
Child::lateStaticDebug(); // Return "NOPE"
Parent::yeah();
Child::lateStaticDebug() // Return "NOPE"
Actual result:
--------------
Parent::yeah();
Parent::lateStaticDebug(); // Returns "YEAH"
Child::nope();
Child::lateStaticDebug(); // Returns "NOPE"
Parent::yeah();
Child::lateStaticDebug() // Returns "YEAH"
--
Edit bug report at http://bugs.php.net/?id=49105&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=49105&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=49105&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=49105&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=49105&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=49105&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=49105&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=49105&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=49105&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=49105&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=49105&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=49105&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=49105&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=49105&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=49105&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49105&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=49105&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=49105&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=49105&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=49105&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=49105&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=49105&r=mysqlcfg
