From: hpdl at oscommerce dot com
Operating system: Linux
PHP version: 4.3.1
PHP Bug Type: Math related
Bug description: number_format rounding differences for floats and strings
We at osCommerce are witnessing rounding problems in our
taxes logic and have made a reproduceable script below.
number_format() produces different rounding results when
floats or strings are passed to the function.
<?php
$price = '100.0000';
// Canada GST 7%
$price = '1.07' * $price;
// Canada/Quebec PST 7.5%
$price = '1.075' * $price;
echo '$price: ' . $price . '<br>' . "\n" .
'number_format($price, 2): ' .
number_format($price, 2) . '<br>' . "\n" .
'number_format((string)$price, 2): ' .
number_format((string)$price, 2);
?>
The correct results are produced when the string value is
passed. The float value produces incorrect results.
I do not know if this is a problem with the number_format
function, or if it is due to floats/mathematics.
--
Edit bug report at http://bugs.php.net/?id=22712&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=22712&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=22712&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=22712&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=22712&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=22712&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=22712&r=support
Expected behavior: http://bugs.php.net/fix.php?id=22712&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=22712&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=22712&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=22712&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=22712&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=22712&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=22712&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=22712&r=gnused
