Random Alphanumeric generator

[nonexistentera]

Hello.

I am wondering how I can get the script below to produce a list of random alphanumeric strings that are less that 10 characters in length and contain all possible combinations.

Such as "a, b, c... aa,ab,ac" until it goes through the full list of available characters.

<?PHP

$length = 2;

$complete = 10;
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

$charslength = strlen($chars);

$randomstring = '';
mysql_connect("localhost","tylerper_root","tperroux") or die("No connection");

while ($t < $length)
{
while ($i < $complete) {
$randomstring .= substr($chars, rand(0, $charslength - 1), 1);

mysql_query("  

INSERT INTO `tylerper_cookbook2`.`xl` (
`id` ,
`md5`
)
VALUES (
'', '$randomstring'
);

");
echo $randomstring. "
<br>
";

$i++;
}

$t++;
}
?>

It produces some what what I would like but not as repeatative for each string length.

 

0

01

018

0181

01817

01817T

01817TV

01817TVS

01817TVSN

01817TVSN5

It only does the length once then goes up, but I need it to do the length the number of times of how many characters there are eg. 26. and have it change instead of just adding another random letter/number.

 

Any help is much appreciated.

Thanks

[JonnoTheDev]

I think your after permutations rather than combinations. Take a look at:

http://www.php.happycodings.com/Algorithms/code21.html