#42418 [NEW]: Strange behaviour of modulus function
| From: | onyjgyjz at trashmail dot net | Date: | Fri, 24 Aug 2007 19:45:39 +0000 |
| Subject: | #42418 [NEW]: Strange behaviour of modulus function | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-116641@lists.php.net to get a copy of this message | ||
From: onyjgyjz at trashmail dot net
Operating system: WinXP
PHP version: 5.2.3
PHP Bug Type: Math related
Bug description: Strange behaviour of modulus function
Description:
------------
Somehow the modulus operator does not behave as expected on some special
numbers.(maybe integer overflow or something like that?)
Php-version i used:
PHP 5.2.3 (cli) (built: May 31 2007 09:37:22)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies
Reproduce code:
---------------
$a=11213214321;
echo $a % 2;
Expected result:
----------------
Output of: 1
Actual result:
--------------
Output of: -1
--
Edit bug report at http://bugs.php.net/?id=42418&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42418&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42418&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42418&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42418&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=42418&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42418&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42418&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42418&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42418&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42418&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=42418&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=42418&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42418&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42418&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42418&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42418&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42418&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42418&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42418&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42418&r=mysqlcfg