url shortener modification
<p>Im working with a php url shortener and my problem is that it only creates the MAX number of shortening codes up to 2 characters (eg domain.com/XX). I want it to go up to 5 characters (eg domain.com/XXXXX)</p>

<p>I believe i found the relevant code, but im not sure how to change it to allow for this modification</p>

<pre><code>function decode_url_id($code)
    { 
     $scheme = "abcdefghijklmnoprstuqwxvyz0123456789ABCDEFGHIJKLMNOPRSTQWXUVYZ";
     $scheme_size = strlen($scheme);

     $number  = 0;
     $code_size = strlen($code);
     $code = strrev($code);
     for($i = 0; $i &lt; $code_size; $i++)
     {
      $digit_value = strpos($scheme, $code[$i]);

      $number += ($digit_value * pow($scheme_size, $i));
     }

     return $number;
    }

    function encode_url_id($number, $code="")
    {
     $scheme = "abcdefghijklmnoprstuqwxvyz0123456789ABCDEFGHIJKLMNOPRSTQWXUVYZ";
     $scheme_size = strlen($scheme);

     if ($number &gt;= $scheme_size)
     {
      $c = $number % $scheme_size;
      $code .= $scheme[$c];
      $number = floor($number / $scheme_size);

      return encode_url_id($number, $code);
     }
     else 
     {
      $code .= $scheme[$number];
      $code = strrev($code);
     }

     return $code;
    }
</code></pre>

<p>Am i barking up the wrong tree?</p>
