the easiest:
$isInUse = 0 ;
while ($isInUse == 0) {
$yourNumber = rand(0,9) . rand(0,9) . rand(0,9) .... (8 times)
/* check here if $yourNumber is already in use and save the value in
$isInUse */
}
without saving the previous you will never be sure if you have duplicates
best,
fernando
On Mon, Mar 9, 2009 at 10:56 PM, chad qian <nynj.t...@hotmail.com> wrote:
> Hi,
> I need to generate random 8-digit numbers continuously.And no
> duplication among all those numbers.In other word,every single 8-digit
> number must be unique.How to do php programming?
>
> Thanks a lots!
>
> chad
>
> ------------------------------
> Express your personality in color! Preview and select themes for Hotmail®. See
> how.<http://www.windowslive-hotmail.com/LearnMore/personalize.aspx?ocid=TXT_MSGTX_WL_HM_express_032009#colortheme>
>
> _______________________________________________
> New York PHP User Group Community Talk Mailing List
> http://lists.nyphp.org/mailman/listinfo/talk
>
> http://www.nyphp.org/show_participation.php
>
_______________________________________________
New York PHP User Group Community Talk Mailing List
http://lists.nyphp.org/mailman/listinfo/talk
http://www.nyphp.org/show_participation.php
