From:
Operating system: Windows XP32
PHP version: 5.3.6
Package: *Math Functions
Bug Type: Bug
Bug description:ceil yields a negative zero
Description:
------------
When doing some math with dates and "ceiling" the result, I got a negative
zero!
I don't understand how that can be, so I presume it's an error.
Test script:
---------------
<?php
$dt = mktime (0, 0, 0, 5, 18, 2011);
$base = mktime (16, 16, 0, 5, 18, 2011);
echo 'dt: ', date ('Y-m-d', $dt), '<br />';
echo 'base: ', date ('Y-m-d', $base), '<br />';
echo '<br />';
echo 'dt - base: <strong>', ceil (($dt - $base) / 86400), '</strong>';
?>
<br /><br />
It outputs "-0" on PHP 5.3.6, under Windows XP 32 bits
Expected result:
----------------
The bolded text should be "0" (zero)
Actual result:
--------------
The bolded text is "-0" (negative zero)
--
Edit bug report at http://bugs.php.net/bug.php?id=54842&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=54842&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=54842&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=54842&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=54842&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=54842&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=54842&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=54842&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=54842&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=54842&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=54842&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=54842&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=54842&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=54842&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=54842&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54842&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=54842&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=54842&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=54842&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=54842&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=54842&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=54842&r=mysqlcfg
