#30271 [NEW]: Bitwise operator returns unwanted values

From: Date: Wed, 29 Sep 2004 08:17:54 +0000
Subject: #30271 [NEW]: Bitwise operator returns unwanted values
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-66857@lists.php.net to get a copy of this message 
From:             mccohy at kyberdigi dot cz
Operating system: Linux
PHP version:      5.0.2
PHP Bug Type:     Math related
Bug description:  Bitwise operator returns unwanted values

Description:
------------
The bitwise operator "and" returns an unwanted value. Here is a simple
example:

Let's store value 924303769 in variable $a and value -2147483649 in
variable $ax. Now, let's count the 'bitwise and' of these two variables
($a & $ax).

PHP 5.0.2 returns zero. PHP 4.3.9 returns 924303769. I am not sure what
happens in 5.0.0 or 5.0.1, sorry.


Reproduce code:
---------------
$a=924303769;
$ax=-2147483649;
echo ($a & $ax)."\n"; 


Expected result:
----------------
924303769

Actual result:
--------------
0

-- 
Edit bug report at http://bugs.php.net/?id=30271&edit=1
-- 
Try a CVS snapshot (php4):   http://bugs.php.net/fix.php?id=30271&r=trysnapshot4
Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=30271&r=trysnapshot50
Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=30271&r=trysnapshot51
Fixed in CVS:                http://bugs.php.net/fix.php?id=30271&r=fixedcvs
Fixed in release:            http://bugs.php.net/fix.php?id=30271&r=alreadyfixed
Need backtrace:              http://bugs.php.net/fix.php?id=30271&r=needtrace
Need Reproduce Script:       http://bugs.php.net/fix.php?id=30271&r=needscript
Try newer version:           http://bugs.php.net/fix.php?id=30271&r=oldversion
Not developer issue:         http://bugs.php.net/fix.php?id=30271&r=support
Expected behavior:           http://bugs.php.net/fix.php?id=30271&r=notwrong
Not enough info:             http://bugs.php.net/fix.php?id=30271&r=notenoughinfo
Submitted twice:             http://bugs.php.net/fix.php?id=30271&r=submittedtwice
register_globals:            http://bugs.php.net/fix.php?id=30271&r=globals
PHP 3 support discontinued:  http://bugs.php.net/fix.php?id=30271&r=php3
Daylight Savings:            http://bugs.php.net/fix.php?id=30271&r=dst
IIS Stability:               http://bugs.php.net/fix.php?id=30271&r=isapi
Install GNU Sed:             http://bugs.php.net/fix.php?id=30271&r=gnused
Floating point limitations:  http://bugs.php.net/fix.php?id=30271&r=float
MySQL Configuration Error:   http://bugs.php.net/fix.php?id=30271&r=mysqlcfg

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