From: lingwitt at bellsouth dot net
Operating system: Mac OS X
PHP version: 5.0.0b4 (beta4)
PHP Bug Type: Class/Object related
Bug description: Bad references accentuated by clone
Description:
------------
When an object's method calls upon another one of its
methods such that the second method returns a reference
that is stored in the the first method as a local
variable, then the reference persists in some way so as
to make cloning problematic.
As a result, a modification to the referenced variable
in the clone cuases a modification to the same variable
in original.
Reproduce code:
---------------
class A
{
var $a = array();
public function makeAReference()
{
$array = $this->getA();
}
public function &getA()
{
return $this->a;
}
}
$A = new A;
$A->a = array(1);
$A->makeAReference();
$clone = clone $A;
$clone->a = array();
print_r($A);
Expected result:
----------------
This is gotten when $A->makeAReference() is removed.
A Object
(
[a] => Array
(
[0] => 1
)
)
Actual result:
--------------
Obviously the modification made it back to the original.
A Object
(
[a] => Array
(
)
)
--
Edit bug report at http://bugs.php.net/?id=27268&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27268&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27268&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27268&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27268&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27268&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27268&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27268&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27268&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27268&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27268&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27268&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27268&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27268&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27268&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27268&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27268&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27268&r=float
