From: ozone at cname dot com
Operating system: linux
PHP version: 5.2.1
PHP Bug Type: Class/Object related
Bug description: can't override inherited private methods
Description:
------------
The page on Visibility states: "Private limits visibility only to the
class that defines the item." Apparently, private methods may not be
superseded by a child of that class; in the following code, a new object e
inherits the __constructor() which calls "$this->df", but because f() is
declared private, it is silently not overridden. This behavior may not
constitute a "bug" in the context of PHP inheritance, but it deserves a
warning message and/or some mention in the documentation.
Note that if f() is declared protected (or public) in both classes,
inheritance works as expected; if the two f()s are declared with differing
protection, an error message results, which is somewhat ironic considering
the above-described silent failure mode.
Reproduce code:
---------------
class d {
function __construct() {
$this->f();
}
private function f() {
echo "d->f()\n";
}
}
class e extends d {
private function f() {
echo "e->f()\n";
}
}
$t = new e();
Expected result:
----------------
e->f()
(Because $this refers to an instance of e when it is executed.)
Actual result:
--------------
d->f()
--
Edit bug report at http://bugs.php.net/?id=41090&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=41090&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=41090&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=41090&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=41090&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=41090&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=41090&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=41090&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=41090&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=41090&r=support
Expected behavior: http://bugs.php.net/fix.php?id=41090&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=41090&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=41090&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=41090&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41090&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=41090&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=41090&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=41090&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=41090&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=41090&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=41090&r=mysqlcfg
