<?
/*
functions
*/
function random_gen($length) {
  $random= "";
  srand((double)microtime()*1000000);
  $char_list = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  $char_list .= "abcdefghijklmnopqrstuvwxyz";
  $char_list .= "1234567890";
  // Add the special characters to $char_list if needed

  for($i = 0; $i < $length; $i++)    {    
     $random .= substr($char_list,(rand()%(strlen($char_list))), 1);  
  }  
  return $random;
} 
?>