Converting long int to string in PHP

Question

I'm using FMS along with PHP and I need the client's ID in order to disconnect some user at some point. So, I retrieve client's ID from FMS, but FMS sends the ID as a long int, such as 4702111234508538223.

Here's my problem; I need to convert this number to something like oAACAAAA in PHP. Is there any short way or some kind of library exists to doing this? Otherwise I have to convert this AS3 library into PHP.

Answer 1

This function converts something like "4702111234525315439" into something like "oAADAAAA":

function convert_id_to_str($id)
{
   if (strspn($id, '0123456789') != strlen($id)) {
      return false;
   }
   $str = '';
   if (PHP_INT_SIZE >= 8) {
      while ($id) {
         $str .= chr($id & 255);
         $id >>= 8;
      }
   } else {
      while ($id) {
         $str .= chr(bcmod($id, '256'));
         $id   =     bcdiv($id, '256', 0);
      }
   }
   return $str;
}