From:
Operating system: Windows XP
PHP version: 5.3.2
Package: Arrays related
Bug Type: Bug
Bug description:array_filter breaks references when a callback is used
Description:
------------
I have an array and a variable which is a reference on some element in this
array:
$arr=array('a'); $ref = &$arr[0]
If I apply array_filter() with a callback like trim() or count() on the
array, the reference is broken and $ref is no longer a reference (If I
apply array_filter() without a callback, the reference is not altered and
the result is correct).
I think that this is a regression introduced in php 5.2.11: with the test
script below, 5.2.10 give the good result, 5.2.11 do not.
I also tested with the latest version (5.3.2): same result, reference is
broken.
PS: I tested on windows XP with packages php-5.x.y-Win32-VC6-x86.zip
provided on this page: http://windows.php.net/downloads/releases/archives/
Test script:
---------------
// Init
$arr = array('some value');
$ref = & $arr[0];
// Change $arr
$arr[0] = 'ONE';
echo 'step 1. $ref is ', ($ref !== 'ONE') ? 'BROKEN' : 'OK', "\n";
// Apply array_filter (without callback) and change $arr
array_filter($arr);
$arr[0] = 'TWO';
echo 'step 2. $ref is ', ($ref !== 'TWO') ? 'BROKEN' : 'OK', "\n";
// Apply array_filter (with a callback) then change $arr
array_filter($arr,'trim');
$arr[0] = 'THREE';
echo 'step 3. $ref is ', ($ref !== 'THREE') ? 'BROKEN' : 'OK', "\n";
Expected result:
----------------
step 1. $ref is OK
step 2. $ref is OK
step 3. $ref is OK
Actual result:
--------------
step 1. $ref is OK
step 2. $ref is OK
step 3. $ref is BROKEN
--
Edit bug report at http://bugs.php.net/bug.php?id=51986&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=51986&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=51986&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=51986&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=51986&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=51986&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=51986&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=51986&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=51986&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=51986&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=51986&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=51986&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=51986&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=51986&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=51986&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51986&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=51986&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=51986&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=51986&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=51986&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=51986&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=51986&r=mysqlcfg
