From: robin_fernandes at uk dot ibm dot com
Operating system: Windows
PHP version: 5.2CVS-2008-02-11 (snap)
PHP Bug Type: Scripting Engine problem
Bug description: Inconsistent handling of static array declarations with
duplicate keys
Description:
------------
There is an inconsistency when handling array declarations that include
multiple entries with the same key but different values, such as
array('a'=>0, 'a'=>1). In almost all cases, the last value will be used (1
in the example above).
But the last part of the testcase below shows an inconsistent case, where
the array is a static variable AND the first duplicate key is a constant
rather than a literal.
This is because in zval_update_constant_ex(), array entries with keys
marked IS_CONSTANT_INDEX are always updated, regardless of the presence and
position of other elements with the same key.
Reproduce code:
---------------
<?php
echo "Duplicate key in non static array declaration:\n";
$nonStatic1 = array('a'=>0, 'a'=>1);
print_r($nonStatic1); // [a] => 1 --> OK
echo "\nDuplicate key in static array declaration:\n";
static $static1 = array('a'=>0, 'a'=>1);
print_r($static1); // [a] => 1 --> OK
define('DUP_KEY', 'a');
echo "\nDuplicate key in non static array declaration using constant as
first key:\n";
$nonStatic2 = array(DUP_KEY=>0, 'a'=>1);
print_r($nonStatic2); // [a] => 1 --> OK
echo "\nDuplicate key in static array declaration using constant as first
key:\n";
static $static2 = array(DUP_KEY=>0, 'a'=>1);
print_r($static2); // [a] => 0 --> bug?
?>
Expected result:
----------------
Duplicate key in non static array declaration:
Array
(
[a] => 1
)
Duplicate key in static array declaration:
Array
(
[a] => 1
)
Duplicate key in non static array declaration using constant as first
key:
Array
(
[a] => 1
)
Duplicate key in static array declaration using constant as first key:
Array
(
[a] => 1
)
Actual result:
--------------
Duplicate key in non static array declaration:
Array
(
[a] => 1
)
Duplicate key in static array declaration:
Array
(
[a] => 1
)
Duplicate key in non static array declaration using constant as first
key:
Array
(
[a] => 1
)
Duplicate key in static array declaration using constant as first key:
Array
(
[a] => 0
)
--
Edit bug report at http://bugs.php.net/?id=44100&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=44100&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=44100&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=44100&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=44100&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=44100&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=44100&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=44100&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=44100&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=44100&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=44100&r=support
Expected behavior: http://bugs.php.net/fix.php?id=44100&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=44100&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=44100&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=44100&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=44100&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=44100&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=44100&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=44100&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=44100&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=44100&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=44100&r=mysqlcfg
