2 function authenticate() {
3 header('WWW-Authenticate: Basic realm="Test Authentication System"');
4 header('HTTP/1.0 401 Unauthorized');
5 echo "You must enter a valid login ID and password to access this resource\n";
8 if (!isset($_SERVER['PHP_AUTH_USER']) ||
9 ($_POST['SeenBefore'] == 1 && $_POST['OldAuth'] == $_SERVER['PHP_AUTH_USER'])) {
13 echo "<p>Welcome: {$_SERVER['PHP_AUTH_USER']}<br>";
14 echo "Old: {$_REQUEST['OldAuth']}";
15 echo "<form action='{$_SERVER['PHP_SELF']}' METHOD='POST'>\n";
16 echo "<input type='hidden' name='SeenBefore' value='1'>\n";
17 echo "<input type='hidden' name='OldAuth' value='{$_SERVER['PHP_AUTH_USER']}'>\n";
18 echo "<input type='submit' value='Re Authenticate'>\n";