From:
Operating system: Irrelevant
PHP version: 5.3.5
Package: Arrays related
Bug Type: Bug
Bug description:array_diff like methods compares false as identity and true as
equal
Description:
------------
array_diff functions compares boolean false as identity (operator "===")
and boolean true as equal (operator "==") so behaves inconsistently. It
should compare all values in same way and in my opinion it should compare
as equals ("==") or have argument (or another mechanism) how to set whether
compare by equal or identity.
As example I use array_diff_assoc but I think it will probably behave
simmilary with another array realted functions (array_diff%,
array_intersect%). In expected result I suppose comparing as equal
(operator '==').
In example you can see, that array_diff_assoc behaves in such way that 0 or
'0' or '' is not same as false, but 1 or '1' is same as true. So false is
compared like '===' and true is compared like '=='. Because 0 is same as
'0' and 1 is same as '1' I suppose, that this problem is only for boolean
false value.
Test script:
---------------
$arr1 = array('a' => 0, 'b' => 1, 'c' => '0', 'd' => '1', 'e' =>
'', 'f' => false, 'g' => true, 'h' => 0, 'i' => 1);
$arr2 = array('a' => false, 'b' => true, 'c' => false, 'd' => true, 'e' =>
false, 'f' => false, 'g' => true, 'h' => '0', 'i' => '1');
var_dump(array_diff_assoc($arr1, $arr2));
Expected result:
----------------
array(0) {
}
Actual result:
--------------
array(2) {
["a"]=>
int(0)
["c"]=>
string(1) "0"
}
--
Edit bug report at http://bugs.php.net/bug.php?id=53724&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53724&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53724&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53724&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53724&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53724&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53724&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53724&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53724&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53724&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53724&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53724&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53724&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53724&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53724&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53724&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53724&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53724&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53724&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53724&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53724&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53724&r=mysqlcfg
