function authenticate_user() {
header('WWW-Authenticate: Basic realm="Secret Stash"');
header("HTTP/1.0 401 Unauthorized");
exit;
}
if (! isset($_SERVER['PHP_AUTH_USER'])) {
authenticate_user();
} else {
mysql_pconnect("localhost","authenticator","secret") or die("Can't connect to database server!");
mysql_select_db("rntsoft") or die("Can't select authentication database!");
$query = "SELECT username, pswd FROM user WHERE username='$_SERVER[PHP_AUTH_USER]' AND pswd=MD5('$_SERVER[PHP_AUTH_PW]')";
$result = mysql_query($query);
// If nothing was found, reprompt the user for the login information.
if (mysql_num_rows($result) == 0) {
authenticate_user();
}
}
?>