I'm trying to script adding/removing users from a RADIUS server using PHP and I'm not having much luck finding documentation anywhere that can help me. I found this script that connects to a port on the RADIUS server and sends commands to change a password for a user....now I need to know how to add/delete users.

Anyone know about this, or could point me to the right place for documentation?

      $passd = fsockopen($server, $port, &$errno, &$errstr);

         $input = fgets($passd, 128);

         if(!eregi( "^200", $input)){

            fclose($passd);

            $errortype="no_connect";

            }

         $output = "user ". $user . "\n";

         fputs($passd,$output);

         $input = fgets($passd, 128);

         if(!eregi( "^200", $input)){

            fclose($passd);

            $errortype="$input";

			}

         $output = "pass " . $old_pass . "\n";

         fputs($passd,$output);

         $input = fgets($passd, 128);

         if(!eregi( "^200", $input)){

            fclose($passd);

            $errortype="$input";

            }

         $output = "newpass $new_pass\n";

         fputs($passd,$output);

         $input = fgets($passd, 128);

         if(!eregi( "^200", $input)){

            fclose($passd);

            $errortype="$input";

            }

         $output = "quit\n";

         fputs($passd,$output);

         $input = fgets($passd, 128);

         if(!eregi( "^200", $input)){

            fclose($passd);

            $errortype="$input";

            }

         fclose($passd);

I could be wrong, but I don't think RADIUS provides a facility to delete users via the RADIUS protocol.

Regardless, RADIUS is defined in RFC2865, and there are additional documents about it in the following four RFCs.