PIN NUMBER GENERATION

i need an algorthm or a script to help with PIN no generation
glad to hear from you

<?
//function creates random four digit PIN
function createPin() {
$i = 0;
srand((double)microtime()*1000000);
$k = 1;
while ($i < 4) {
$var = rand(1,9);
$pin = $pin + ($var * $k);
$k = $k * 10;
$i++;
}
return $pin
}
?>

Oh and just to be picky, "PIN number" is technically incorrect as the "N" in PIN stands for number anyway. ;)

~MKK

i really appreciate your response and thanks for your correction
i would appreciate add a module that stores the number generated in a database

Well I would need to know the set up of your database table for that, but it would be something simple like:

<?
//function creates random four digit PIN
function createPin() {
$i = 0;
srand((double)microtime()*1000000);
$k = 1;
while ($i < 4) {
$var = rand(1,9);
$pin = $pin + ($var * $k);
$k = $k * 10;
$i++;
}

//add database connect here

$sql = "INSERT INTO pins (`pin`) VALUES ('$pin');";
mysql_query($sql);
}
?>