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

go to bug id or search bugs for

Bug #27355 rand() generates even-odd-even-odd numbers
Submitted: 2004-02-22 15:25 UTC Modified: 2004-02-22 22:27 UTC
From: chrisrogers at planetunreal dot com Assigned:
Status: Not a bug Package: Math related
PHP Version: 4.3.4 OS: Windows
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: chrisrogers at planetunreal dot com
New email:
PHP Version: OS:

 

 [2004-02-22 15:25 UTC] chrisrogers at planetunreal dot com 
Description:
------------
The rand() function under Windows XP Pro and possibly other Windows OSs generates numbers in a strict even-odd-even-odd pattern.  The pattern doesn't occur on *nix OSs

Reproduce code:
---------------
<?php
for (i = 0; i < 100; i++)
    echo rand()."<br />\n";
?>

Expected result:
----------------
expected numbers with no noticable pattern

Actual result:
--------------
numbers were in an even-odd-even-odd pattern

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2004-02-22 21:17 UTC] cjbj at hotmail dot com 
May be related to bug 27052 which I reproduced (with the same pattern too).
 [2004-02-22 22:27 UTC] sniper@php.net 
Please do not submit the same bug more than once. An existing
bug report already describes this very problem. Even if you feel
that your issue is somewhat different, the resolution is likely
to be the same. 

Thank you for your interest in PHP.

This is already fixed in CVS..
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Fri Dec 27 08:01:28 2024 UTC