php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #63424 Incorrect ceil() rounding
Submitted: 2012-11-03 08:39 UTC Modified: 2012-11-03 08:46 UTC
From: pgt-r at ya dot ru Assigned:
Status: Not a bug Package: Math related
PHP Version: 5.4.7RC1 OS: Windows XP SP3
Private report: No CVE-ID: None
View Add Comment Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If this is not your bug, you can add a comment by following this link.
If this is your bug, but you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: pgt-r at ya dot ru
New email:
PHP Version: OS:

 

 [2012-11-03 08:39 UTC] pgt-r at ya dot ru 
Description:
------------
Problem in function ceil()

Test script:
---------------
<?php
    echo ceil((10 + 100) / 100 * 100); //111, but not 100
?>

Expected result:
----------------
The function ceil(((10 + 100) / 100 * 100)) must be return 110, but return 111

Actual result:
--------------
fffff

Patches

Add a Patch

Pull Requests

Add a Pull Request

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2012-11-03 08:46 UTC] nikic@php.net 
Floating point values have a limited precision. Hence a value might 
not have the same string representation after any processing. That also
includes writing a floating point value in your script and directly 
printing it without any mathematical operations.

If you would like to know more about "floats" and what IEEE
754 is, read this:
http://www.floating-point-gui.de/

Thank you for your interest in PHP.
 [2012-11-03 08:46 UTC] nikic@php.net
-Status: Open +Status: Not a bug
 [2012-11-03 08:46 UTC] nikic@php.net
-Summary: c +Summary: Incorrect ceil() rounding
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Mon Apr 29 19:01:30 2024 UTC