[PHP-BUG] Bug #51522 [NEW]: function floor

From:             
Operating system: windows
PHP version:      5.2.13
Package:          *General Issues
Bug Type:         Bug
Bug description:function floor

Description:
------------
example: 

$value=30.40;
$comision=5;
$val_comision=($value*(1/(1-($comision/100)))-$value);
$suma=$val_comision + $value;
$value_acreditado=floor($suma);

$value_acreditado=31 // wrong  result

but  the  correct answere is 32




Test script:
---------------
example: 

$value=30.40;
$comision=5;
$val_comision=($value*(1/(1-($comision/100)))-$value);
$suma=$val_comision + $value;
$value_acreditado=floor($suma);

$value_acreditado=31 // wrong  result

but  the  correct answere is 32

Expected result:
----------------
 correct answere is 32

Actual result:
--------------
$value_acreditado=31

-- 
Edit bug report at http://bugs.php.net/bug.php?id=51522&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=51522&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=51522&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=51522&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=51522&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51522&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=51522&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=51522&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=51522&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=51522&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=51522&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=51522&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=51522&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=51522&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=51522&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51522&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51522&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=51522&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=51522&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=51522&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=51522&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=51522&r=mysqlcfg