<?php
session_cache_limiter('private');
session_cache_expire(0);
session_start();
$_SESSION["s_login_status"] = '';
$_SESSION['admin'] = 'FALSE';
$_SERVER["PHP_AUTH_USER"] = '';
$_SERVER["PHP_AUTH_PW"] = '';
unset($_SERVER["PHP_AUTH_USER"]);
unset($_SERVER["PHP_AUTH_PW"]);
session_unset();
session_destroy();
session_write_close();

/*
$valid_passwords = array ("mcell" => "blank");
$valid_users = array_keys($valid_passwords);

$user = $_SERVER['PHP_AUTH_USER'];
$pass = $_SERVER['PHP_AUTH_PW'];

$validated = (in_array($user, $valid_users)) && ($pass == $valid_passwords[$user]);

if (!$validated) {
  header('WWW-Authenticate: Basic realm="Basic Realm"');
  header('HTTP/1.0 401 Unauthorized');
  die ("Not authorized");
}

// If arrives here, is a valid user.
echo "<p>Welcome $user.</p>";
echo "<p>Congratulation, you are into the system.</p>";
*/
/*
function authenticate() {
    header('WWW-Authenticate: Basic realm="Test Authentication System"');
    header('HTTP/1.0 401 Unauthorized');
    echo "You must enter a valid login ID and password to access this resource\n";
    exit;
}
 
if (!isset($_SERVER['PHP_AUTH_USER']) ||
    ($_POST['SeenBefore'] == 1 && $_POST['OldAuth'] == $_SERVER['PHP_AUTH_USER'])) {
    authenticate();
} else {
    echo "<p>Welcome: {$_SERVER['PHP_AUTH_USER']}<br />";
    echo "Old: {$_REQUEST['OldAuth']}";
    echo "<form action='{$_SERVER['PHP_SELF']}' METHOD='post'>\n";
    echo "<input type='hidden' name='SeenBefore' value='1' />\n";
    echo "<input type='hidden' name='OldAuth' value='{$_SERVER['PHP_AUTH_USER']}' />\n";
    echo "<input type='submit' value='Re Authenticate' />\n";
    echo "</form></p>\n";
}
*/
/*
$realm = 'Restricted area';

//user => password
$users = array('admin' => 'mypass', 'guest' => 'guest');


if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
    header('HTTP/1.1 401 Unauthorized');
    header('WWW-Authenticate: Digest realm="'.$realm.'",qop="auth",nonce="'.uniqid(1).'",opaque="'.md5($realm).'"');

    die('Text to send if user hits Cancel button');
}

// analyze the PHP_AUTH_DIGEST variable
if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) || !isset($users[$data['username']]))
    die('Wrong Credentials!');


// generate the valid response
$A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);
$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);

if ($data['response'] != $valid_response)
    die('Wrong Credentials!');

// ok, valid username & password
echo 'Your are logged in as: ' . $data['username'];


// function to parse the http auth header
function http_digest_parse($txt)
{
    // protect against missing data
    $needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
    $data = array();

    preg_match_all('@(\w+)=(?:([\'"])([^\2]+)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);

    foreach ($matches as $m) {
        $data[$m[1]] = $m[3] ? $m[3] : $m[4];
        unset($needed_parts[$m[1]]);
    }

    return $needed_parts ? false : $data;
}
*/
header("location: index.php");
?>