From: mikael at SPAMMENOTchl dot chalmers dot se
Operating system: Linux
PHP version: 4.3.9
PHP Bug Type: Arrays related
Bug description: Fix for #29493 seem to have caused other errors
Description:
------------
In regard to bug #29493 (would have added a comment to it if I could)
--
This fix seems to have been backported to PHP 4.3.9, now we get other
errors.
In the example below $acopy is a reference to $arr['acopy'] and $a is also
a reference to $arr['acopy'], when actually $a should have been separated
from $arr['acopy'] when extract() makes the $acopy reference to
$arr['acopy'] since the array is created with 'acopy' => $a
$b, $arr['bref'] and $bref should and does however all point to the same
value as they should since the array is created with 'bref' => &$b
Reproduce code:
------------
Reproduce code:
---------------
$a = 1; $b = 1;
$arr = array('acopy' => $a, 'bref' => &$b);
extract($arr, EXTR_REFS);
$acopy++;
$bref++;
debug_zval_dump($a, $b, $arr, $acopy, $bref);
Expected result:
----------------
(As seen on PHP < 4.3.9):
$a: long(1) refcount(2)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
["acopy"]=>
&long(2) refcount(2)
["bref"]=>
&long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
Note: Shouldn't the refcount of $a be == 1 instead of 2. $a should be a
separate zval while $arr['acopy'] and $acopy should be references to the
same value as indicated by the refcount of 2
Actual result:
--------------
$a is now == 2, when it should be == 1. Only $arr['acopy'] should be == 2
$a: long(2) refcount(1)
$b: long(2) refcount(1)
$arr: array(2) refcount(2){
["acopy"]=>
&long(2) refcount(3)
["bref"]=>
&long(2) refcount(3)
}
$acopy: long(2) refcount(1)
$bref: long(2) refcount(1)
--
Edit bug report at http://bugs.php.net/?id=31213&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31213&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=31213&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=31213&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=31213&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=31213&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=31213&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=31213&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=31213&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=31213&r=support
Expected behavior: http://bugs.php.net/fix.php?id=31213&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=31213&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=31213&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=31213&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31213&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=31213&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=31213&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=31213&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=31213&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=31213&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=31213&r=mysqlcfg
