Re: [PHP] generate random ascii string

[bill]

Philip,

With a few tweaks, it works great, thanks!

Here's what worked:

function randomString($len)
{
global $seed;

  $tmp = '';

  $chars  = 'abcdefghijklmnopqrstuvwxyz';
  $chars .= strtoupper($chars);
  $chars .= '0123456789';

  if (empty($seed)) {
    mt_srand ((float) microtime() * 1000000);
    $seed = TRUE;
  }

  // weak error checking mechanism
  if ($len < 1 || !intval($len)) $len = 8;

  $chars_len = strlen($chars);

  for ($a=1; $a <= $len; $a++) {
    $tmp .= $chars[mt_rand(0,$chars_len)];
  }

  return $tmp;
}

Philip Olson wrote:

> Hi Bill,
>
> Here's a quick hack, should get you on your way :
>
> function randomString($len)
> {
> global $seed;
>
>   $tmp = '';
>
>   $chars  = 'abcdefghijklmnopqrstuvwxyz';
>   $chars .= strtoupper($chars);
>   $chars .= '0123456789';
>
>   if (empty($seed)) {
>     mt_srand ((float) microtime() * 1000000);
>     $seed = TRUE;
>   }
>
>   // weak error checking mechanism
>   if ($len < 1 || !is_numeric($len)) $len = 8;
>
>   $chars_len = strlen($chars);
>
>   for ($a=1; $a <= $len; $a++) {
>     $tmp .= $chars{mt_rand(0,$chars_len)};
>   }
>
>   return $tmp;
> }
>
> That was fun :)
>
> Regards,
> Philip Olson
>
> On Sat, 1 Sep 2001, bill wrote:
>
> > How can a random string of only letters and numbers be generated?
> >
> > I'm stumped so far on how to avoid including symbols.
> >
> >
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