function __construct($pasword)
{
self::$password = $pasword;
if (!isset($_SERVER['PHP_AUTH_USER'])) {
header('WWW-Authenticate: Basic realm="This is a password protected area, please submit your password to enter."');
header('HTTP/1.0 401 Unauthorized');
echo 'Not authorised.';
exit;
} else {
if ($_SERVER['PHP_AUTH_PW'] != self::$password) {
echo 'Not authorised.';
exit;
}
}
}