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

go to bug id or search bugs for

Bug #23791 Mod doesn't return correct values
Submitted: 2003-05-24 09:58 UTC Modified: 2003-05-25 04:52 UTC
From: info at veebiteenused dot com Assigned:
Status: Wont fix Package: Math related
PHP Version: 4.3.2RC4 OS: RedHat Linux 9
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: info at veebiteenused dot com
New email:
PHP Version: OS:

 

 [2003-05-24 09:58 UTC] info at veebiteenused dot com 
long2ip(3232238081) = '192.168.10.-255'

3232238081 % 256 = -255

must be:

3232238081 % 256 = 1

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2003-05-24 18:04 UTC] derick@php.net 
I don't see any problem here, the script below produce the correct output:

[derick@kossu derick]$ php-4.3.2RC4 
<?php
echo long2ip(3232238081);
?>
192.168.10.1

Please submit a valid script that reproduces this problem.

Derick
 [2003-05-24 20:07 UTC] michael dot mauch at gmx dot de 
<?php
echo 2147483647 % 1000,"\n";
echo 2147483648 % 1000,"\n";
echo 2147483649 % 1000,"\n";
echo fmod(2147483648,1000),"\n";
?>

Output:

647
-648
-647
648

This is on 32 bit Linux. I'm not sure whether % is supposed to work with numbers bigger than LONG_MAX. 

No problem with long2ip here.
 [2003-05-25 04:52 UTC] derick@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

PHP only supports signed integers (range is -2147483648 to 2147483647 on Linux), so this is actually the expected behavior. We do not 'upgrade' the number to a float automatically because that would be against the nature of the % operator: integer modulo.
 [2003-05-25 04:52 UTC] derick@php.net 
Won't fix is a better state.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Wed Jan 15 12:01:29 2025 UTC