[PHP] Random Function

[Teren]

Hi, I have the following function that generates a random number, but the key is it 
only generates the number once within the range you specify. So, if you want a range 
of 5 numbers, it will give you 5 different numbers. My problem is the function was set 
to start at 0, but I need it to start at 1, so i made a change to the function (line 
9) and now the script only works every now and then. Can somebody look at it and see 
if they see why it would be doing that? Thanks

<?php

$s = array();
$n = 3;

function set_num() {

File random0.php saved.
$ cat random0.php
<?php

$s = array();
$n = 3;

function set_num() {
  global $s, $n;
  $add = "yes";
  $ran = rand(1, $n);
  if(count($s) > 0) {
    foreach($s as $sh) {
      if($ran == $sh) {
        $add = "no";
      }
    }
  }
  if($add == "yes") {
    $s[] = $ran;
  } else {
    set_num();
  }
}

while(count($s) <= $n) {
  set_num();
}
?>

Teren