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

go to bug id or search bugs for

Bug #16926 Shuffle doesn't work
Submitted: 2002-04-30 08:14 UTC Modified: 2002-06-18 19:55 UTC
From: joseppo at hotmail dot com Assigned:
Status: Closed Package: Arrays related
PHP Version: 4.2.0 OS: WinXP
Private report: No CVE-ID: None
View Developer Edit
 [2002-04-30 08:14 UTC] joseppo at hotmail dot com 
As of PHP 4.2.0, shuffle() doesn't seem to work for me.
The following code always produce the same output:
function make_seed() { // Taken directly from the manual
    list($usec, $sec) = explode(' ', microtime());
    return (float) $sec + ((float) $usec * 100000);
}

srand(make_seed());
$arr = range(1, 10);
shuffle($arr);
print_r($arr);


Further testing shows that I get the same output if I uncomment the srand(), if that's any help.

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2002-05-01 03:08 UTC] derick@php.net 
I could not reproduce this, are you sure the browser is not caching your page?

Derick
 [2002-05-01 05:06 UTC] joseppo at hotmail dot com 
Yes, I'm sure. I've tried running it from the command line with the same result.
I've done a little more testing, and it seems that rand() seems to work just fine, so that should more or less exclude the possibility of a bug in srand().

I've also done a full reinstall (just to make sure) without any luck.
 [2002-05-01 12:39 UTC] rodif_bl@php.net 
I made patch for this awhile ago. It never was commited.

http://bugs.php.net/bug.php?id=7045
 [2002-06-18 19:55 UTC] sniper@php.net 
This bug has been fixed in CVS. You can grab a snapshot of the
CVS version at http://snaps.php.net/. In case this was a documentation 
problem, the fix will show up soon at http://www.php.net/manual/.
In case this was a PHP.net website problem, the change will show
up on the PHP.net site and on the mirror sites.
Thank you for the report, and for helping us make PHP better.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Fri Nov 21 03:00:01 2025 UTC