#!/usr/bin/php4
<?php
/*
 * Based on a function in the comments on:
 * http://www.php.net/rand
 */
function randomString($len = 10)
{
   $pass = '';
   $lchar = 0;
   $char = 0;
   for($i = 0; $i < $len; $i++) {
       while($char == $lchar) {
           $char = rand(48, 109);
           if($char > 57) $char += 7;
           if($char > 90) $char += 6;
       }
       $pass .= chr($char);
       $lchar = $char;
   }
   return $pass;
}

echo randomString(rand(5,20))."\n";
?>