genToken- Php file

  <?php

  public function genToken($len = 32, $md5 = true) {
         # Seed random number generator
         # Only needed for PHP versions prior to 4.2
         mt_srand((double) microtime() * 1000000);
         # Array of characters, adjust as desired
         $chars = array(
             'Q', '@', '8', 'y', '%', '^', '5', 'Z', '(', 'G', '_', 'O', '`',
             'S', '-', 'N', '<', 'D', '{', '}', '[', ']', 'h', ';', 'W', '.',
             '/', '|', ':', '1', 'E', 'L', '4', '&', '6', '7', '#', '9', 'a',
             'A', 'b', 'B', '~', 'C', 'd', '>', 'e', '2', 'f', 'P', 'g', ')',
             '?', 'H', 'i', 'X', 'U', 'J', 'k', 'r', 'l', '3', 't', 'M', 'n',
             '=', 'o', '+', 'p', 'F', 'q', '!', 'K', 'R', 's', 'c', 'm', 'T',
             'v', 'j', 'u', 'V', 'w', ',', 'x', 'I', '$', 'Y', 'z', '*'
         );
         # Array indice friendly number of chars;
         $numChars = count($chars) - 1;
         $token = '';
         # Create random token at the specified length
         for ($i = 0; $i < $len; $i++)
             $token .= $chars[mt_rand(0, $numChars)];
         # Should token be run through md5?
         if ($md5) {
             # Number of 32 char chunks
             $chunks = ceil(strlen($token) / 32);
             $md5token = '';
             # Run each chunk through md5
             for ($i = 1; $i <= $chunks; $i++)
                 $md5token .= md5(substr($token, $i * 32 - 32, 32));
             # Trim the token
             $token = substr($md5token, 0, $len);
         } 

         return $token;
     }