Using HTTP authentication with a PHP script
<?php if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW'])) { header('WWW-Authenticate: Basic realm="Member Area"'); header("HTTP/1.0 401 Unauthorized"); echo "Please login with a valid username and password."; exit; } else { echo "You entered a username of: ".$_SERVER['PHP_AUTH_USER']." "; echo "and a password of: ".$_SERVER['PHP_AUTH_PW']."."; } ?>