From: marc-bennewitz at arcor dot de
Operating system: Linux acer-aspire-5680 3.2.0-38-
PHP version: master-Git-2013-03-19 (Git)
Package: Scripting Engine problem
Bug Type: Bug
Bug description:Wrong value on casting a float point number into int
Description:
------------
On some circumstances it's possible to get a wrong integer value on casting
from float.
I can reproduce this bug with the following installations:
php -v
PHP 5.3.10-1ubuntu3.6 with Suhosin-Patch (cli) (built: Mar 11 2013
14:34:31)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
with Xdebug v2.1.0, Copyright (c) 2002-2010, by Derick Rethans
./sapi/cli/php -v
PHP 5.6.0-dev (cli) (built: Mar 17 2013 22:02:54)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.6.0-dev, Copyright (c) 1998-2013 Zend Technologies
Test script:
---------------
// this works
$v = (float) 6;
var_dump($v, (int)$v);
// this is wrong
$v = log(64, 2);
var_dump($v, (int)$v);
Expected result:
----------------
float(6)
int(6)
float(6)
int(6)
Actual result:
--------------
float(6)
int(6)
float(6)
int(5)
--
Edit bug report at https://bugs.php.net/bug.php?id=64459&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64459&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64459&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64459&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64459&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64459&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64459&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64459&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64459&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64459&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64459&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64459&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64459&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64459&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64459&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64459&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64459&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64459&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64459&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64459&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64459&r=mysqlcfg
