ID: 36172
Updated by: [EMAIL PROTECTED]
Reported By: php at justin dot meagerman dot net
-Status: Open
+Status: Closed
Bug Type: Documentation problem
Operating System: linux
PHP Version: 5.1.2
New Comment:
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.
Thank you for the report, and for helping us make our documentation
better.
"Method does not have access to its parent's class private properties.
It is possible to serialize them through SPL interface Serializable."
Previous Comments:
------------------------------------------------------------------------
[2006-01-27 08:38:53] [EMAIL PROTECTED]
reclassified.
------------------------------------------------------------------------
[2006-01-26 21:35:58] php at justin dot meagerman dot net
Thank you for the workaround. However, the existence of a workaround
does not invalidate the bug. This is clearly not expected behavior.
Moreover, when __sleep methods are not defined, the behaviour is as
expected, as noted below.
If this really is not a bug, then it needs to be documented in the
__sleep documentation page (and this bug's category should be changed
to reflect that).
<?php
class A {
private $a;
public function __construct() {
$this->a = 'aVal';
}
}
class B extends A {
private $b;
public function __construct() {
parent::__construct();
$this->b = 'bVal';
}
}
$serialB = serialize(new B());
print_r(unserialize($serialB));
?>
outputs:
B Object
(
[b:private] => bVal
[a:private] => aVal
)
------------------------------------------------------------------------
[2006-01-26 20:24:42] [EMAIL PROTECTED]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
Use interface Serializable, see:
$> php --rc Serializable
------------------------------------------------------------------------
[2006-01-26 19:42:57] php at justin dot meagerman dot net
Description:
------------
With a private member defined in a parent class and a subclass which
defines a __sleep method, serialization of instances of the subclass
will not save the parent's private member.
This works as expected if __sleep methods are not defined.
Clearly, because of name conflicts, the child __sleep cannot return the
names of the parent's private members (directly, or indirectly by
calling parent::__sleep), and therefore I think PHP might need to call
__sleep for each class in the hierarchy.
This may be the same issue the no-feedback bug #35779 was trying to
convey.
Reproduce code:
---------------
class A {
private $a;
public function __construct() {
$this->a = 'aVal';
}
public function __sleep() {
return array('a');
}
}
class B extends A {
private $b;
public function __construct() {
parent::__construct();
$this->b = 'bVal';
}
public function __sleep() {
//return array('b');
return array_merge(parent::__sleep(), array('b'));
}
}
$serialB = serialize(new B());
print_r(unserialize($serialB));
Expected result:
----------------
B Object
(
[b:private] => bVal
[a:private] => aVal
)
Actual result:
--------------
Notice: serialize(): "a" returned as member variable from __sleep() but
does not exist in [...]
B Object
(
[b:private] => bVal
[a:private] =>
[a] =>
)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=36172&edit=1
