From:
Operating system: Ubuntu 8.04
PHP version: 5.2.13
Package: Math related
Bug Type: Bug
Bug description:Error in type convert after specific round() operation
Description:
------------
First I perform specific round() operation. Then I convert the number from
float to integer. The result is wrong, the number differs by 1 from what it
should be.
The problem appears not for every number.
Test script:
---------------
// this works bad:
$sum = '4926.11';
$sum = round($sum, 2) * 100;
var_dump($sum); // float(492611)
$sum = (integer) $sum;
var_dump($sum); // int(492610)
// the same round() operation, the other number, works good
$sum = '426.11';
$sum = round($sum, 2) * 100;
var_dump($sum); // float(42611)
$sum = (integer) $sum;
var_dump($sum); // int(42611)
// the first numbers, the other round() operation, works good
$sum = '4926.11';
$sum = round($sum * 100);
var_dump($sum); // float(492611)
$sum = (integer) $sum;
var_dump($sum); // int(492611)
--
Edit bug report at http://bugs.php.net/bug.php?id=52315&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52315&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52315&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52315&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52315&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52315&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52315&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52315&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52315&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52315&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52315&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52315&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52315&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52315&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52315&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52315&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52315&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52315&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52315&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52315&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52315&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52315&r=mysqlcfg
