From:
Operating system:
PHP version: 5.2.14
Package: Scripting Engine problem
Bug Type: Bug
Bug description:list() uses overwritten variable
Description:
------------
When a parameter to list() and the variable assigned to it are the same
(that means list(...,$a)=$a;), list() uses the new value of the variable
(once it's been overwritten) and reads the remaining parameters from this
new value. This is surprising and undocumented behaviour. It would be
better if list() kept assigning values from the originally assigned array.
The problem exists in PHP 5.3.2-2 too.
This is not important, just surprising. Array variables usually get named
distinctly from other variables, so the conflict doesn't surface often.
Test script:
---------------
$n=array("b","#123");
list($b,$n)=$n; // Currently equivalent to "$n=$n[1]; $b=$n[0];"
echo $b;
Expected result:
----------------
b
Actual result:
--------------
#
--
Edit bug report at http://bugs.php.net/bug.php?id=53332&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53332&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53332&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53332&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53332&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53332&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53332&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53332&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53332&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53332&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53332&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53332&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53332&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53332&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53332&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53332&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53332&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53332&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53332&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53332&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53332&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53332&r=mysqlcfg
