Re: Random number generator
| From: | Andrew Ballard | Date: | Thu, 06 Nov 2008 16:09:09 +0000 |
| Subject: | Re: Random number generator | ||
| References: | 1 2 3 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-283001@lists.php.net to get a copy of this message | ||
On Thu, Nov 6, 2008 at 10:53 AM, WEISD <pzig@weisd.com> wrote:
>
> ""Gary M. Josack"" <lists@byoteki.com> wrote in message
> news:4911EC29.8070309@byoteki.com...
>>
>> Stephen wrote:
>>>>
>>>> On a php web page I want to generate a random number between say 1 and
>>>> 10 and then use that number to reference a particular file in
>>>> an include tag.
>>>>
>>>> <?php include('GeneratedNumber.html'); ?>
>>>>
>>>> Is there an easy way to do this?
>>>>
>>>
>>> Get the time and use the last digit converting 0 to 10.
>>>
>>> Stephen
>>>
>>>
>> rand(1, 10);
>
> Thanks for the help!!
>
> php's random number generator seems to have favorite numbers.
>
> rand(1, 10); produces 10 & 3, 90% of the time....
>
That is strange. I get pretty balanced results on this computer.
<?php
$histogram = array_fill(1, 10, 0);
$iterations = 200000;
for ($i = 0; $i < $iterations; ++$i) {
++$histogram[round(rand(1, 10))];
}
print_r($histogram);
?>
Array
(
[1] => 19991 (10.00%)
[2] => 19981 (9.99%)
[3] => 20011 (10.01%)
[4] => 19998 (10.00%)
[5] => 20049 (10.02%)
[6] => 20008 (10.00%)
[7] => 19983 (9.99%)
[8] => 19986 (9.99%)
[9] => 20007 (10.00%)
[10] => 19986 (9.99%)
)
Andrew