Access-Reject in a php script

Hi all! I am using a script for the authentication and it is working well. I can send a list of attributes without any problem. Now I want to send an "Access-Reject" if the authentication fails but I do not know how...I would be very grateful if someone could tell me how to do so. herein is a test script: #!/usr/bin/php <?php $argv = $_SERVER['argv']; if ( $argv[1] == "toto") echo "Session-Timeout:=100"; else echo "Access-Reject"; //NOT WORKING!!!!!! ?> Thanks a lot for your assistance Khalid :)