content protected with password on drupal

gistfile1.txt

<?php
// Add this into PHP code
    $username = $_SERVER['PHP_AUTH_USER'];
    $password = $_SERVER['PHP_AUTH_PW'];
    if (!isset($_SERVER['PHP_AUTH_USER'])
    || $username != "qwerty" || $password != "qwerty") {
        header('WWW-Authenticate: Basic realm="Please Login"');
        header('HTTP/1.0 401 Unauthorized');
        print 'Sorry, incorrect password or username.';
        exit;
    }
?>