key: wordpress_logged_in_1234567890abcdef1234567890abcdef
value: admin|1234567890|abcdef1234567890abcdef1234567890

$key = ... // the key from the WP cookie
$value = ... // the value from the WP cookie
$hash = hash_hmac ( 'md5' , $key.$value , 'some secret key' );

<?php

//this stops wp-settings from load everything
define ('SHORTINIT',true);

error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );

/** Define ABSPATH as this files directory */
define( 'ABSPATH', dirname(__FILE__) . '/' );

//WP config file
require ('wp-config.php');

if (SHORTINIT):

// Load the l18n library.
require( ABSPATH . WPINC . '/l10n.php' );

// Run the installer if WordPress is not installed.
wp_not_installed();


// Load most of WordPress.
require( ABSPATH . WPINC . '/class-wp-walker.php' );
//require( ABSPATH . WPINC . '/class-wp-ajax-response.php' );
require( ABSPATH . WPINC . '/formatting.php' );
require( ABSPATH . WPINC . '/capabilities.php' );
require( ABSPATH . WPINC . '/query.php' );
require( ABSPATH . WPINC . '/theme.php' );
require( ABSPATH . WPINC . '/user.php' );
require( ABSPATH . WPINC . '/meta.php' );
require( ABSPATH . WPINC . '/general-template.php' );
require( ABSPATH . WPINC . '/link-template.php' );
//require( ABSPATH . WPINC . '/author-template.php' );
require( ABSPATH . WPINC . '/post.php' );
//require( ABSPATH . WPINC . '/post-template.php' );
//require( ABSPATH . WPINC . '/category.php' );
//require( ABSPATH . WPINC . '/category-template.php' );
require( ABSPATH . WPINC . '/comment.php' );
//require( ABSPATH . WPINC . '/comment-template.php' );
require( ABSPATH . WPINC . '/rewrite.php' );
//require( ABSPATH . WPINC . '/feed.php' );
//require( ABSPATH . WPINC . '/bookmark.php' );
//require( ABSPATH . WPINC . '/bookmark-template.php' );
require( ABSPATH . WPINC . '/kses.php' );
require( ABSPATH . WPINC . '/cron.php' );
//require( ABSPATH . WPINC . '/deprecated.php' );
require( ABSPATH . WPINC . '/script-loader.php' );
require( ABSPATH . WPINC . '/taxonomy.php' );
//require( ABSPATH . WPINC . '/update.php' );
//require( ABSPATH . WPINC . '/canonical.php' );
require( ABSPATH . WPINC . '/shortcodes.php' );
require( ABSPATH . WPINC . '/media.php' );
require( ABSPATH . WPINC . '/http.php' );
require( ABSPATH . WPINC . '/class-http.php' );
require( ABSPATH . WPINC . '/widgets.php' );
require( ABSPATH . WPINC . '/nav-menu.php' );
//require( ABSPATH . WPINC . '/nav-menu-template.php' );
//require( ABSPATH . WPINC . '/admin-bar.php' );

// Load multisite-specific files.
if ( is_multisite() ) {
    require( ABSPATH . WPINC . '/ms-functions.php' );
    require( ABSPATH . WPINC . '/ms-default-filters.php' );
    require( ABSPATH . WPINC . '/ms-deprecated.php' );
}

// Define constants that rely on the API to obtain the default value.
// Define must-use plugin directory constants, which may be overridden in the sunrise.php drop-in.
wp_plugin_directory_constants( );

// Load must-use plugins.
/*foreach ( wp_get_mu_plugins() as $mu_plugin ) {
    include_once( $mu_plugin );
}
unset( $mu_plugin );*/

// Load network activated plugins.
if ( is_multisite() ) {
    foreach( wp_get_active_network_plugins() as $network_plugin ) {
        include_once( $network_plugin );
    }
    unset( $network_plugin );
}

do_action( 'muplugins_loaded' );

if ( is_multisite() )
    ms_cookie_constants(  );

// Define constants after multisite is loaded. Cookie-related constants may be overridden in ms_network_cookies().
wp_cookie_constants( );

// Define and enforce our SSL constants
wp_ssl_constants( );

// Create common globals.
require( ABSPATH . WPINC . '/vars.php' );

// Make taxonomies and posts available to plugins and themes.
// @plugin authors: warning: these get registered again on the init hook.
create_initial_taxonomies();
create_initial_post_types();

// Register the default theme directory root
//register_theme_directory( get_theme_root() );

// Load active plugins.
/*foreach ( wp_get_active_and_valid_plugins() as $plugin )
    include_once( $plugin );
unset( $plugin );*/

// Load pluggable functions.
require( ABSPATH . WPINC . '/pluggable.php' );
//require( ABSPATH . WPINC . '/pluggable-deprecated.php' );

// Set internal encoding.
wp_set_internal_encoding();

// Run wp_cache_postload() if object cache is enabled and the function exists.
if ( WP_CACHE && function_exists( 'wp_cache_postload' ) )
    wp_cache_postload();

do_action( 'plugins_loaded' );

// Define constants which affect functionality if not already defined.
wp_functionality_constants( );

// Add magic quotes and set up $_REQUEST ( $_GET + $_POST )
wp_magic_quotes();

do_action( 'sanitize_comment_cookies' );

/**
 * WordPress Query object
 * @global object $wp_the_query
 * @since 2.0.0
 */
$wp_the_query = new WP_Query();

/**
 * Holds the reference to @see $wp_the_query
 * Use this global for WordPress queries
 * @global object $wp_query
 * @since 1.5.0
 */
$wp_query =& $wp_the_query;

/**
 * Holds the WordPress Rewrite object for creating pretty URLs
 * @global object $wp_rewrite
 * @since 1.5.0
 */
$wp_rewrite = new WP_Rewrite();

/**
 * WordPress Object
 * @global object $wp
 * @since 2.0.0
 */
$wp = new WP();

/**
 * WordPress Widget Factory Object
 * @global object $wp_widget_factory
 * @since 2.8.0
 */
$GLOBALS['wp_widget_factory'] = new WP_Widget_Factory();

do_action( 'setup_theme' );

// Define the template related constants.
wp_templating_constants(  );

// Load the default text localization domain.
load_default_textdomain();

// Find the blog locale.
$locale = get_locale();
$locale_file = WP_LANG_DIR . "/$locale.php";
if ( ( 0 === validate_file( $locale ) ) && is_readable( $locale_file ) )
    require( $locale_file );
unset($locale_file);

// Pull in locale data after loading text domain.
require( ABSPATH . WPINC . '/locale.php' );

/**
 * WordPress Locale object for loading locale domain date and various strings.
 * @global object $wp_locale
 * @since 2.1.0
 */
$GLOBALS['wp_locale'] = new WP_Locale();

// Load the functions for the active theme, for both parent and child theme if applicable.
/*if ( ! defined( 'WP_INSTALLING' ) || 'wp-activate.php' === $pagenow ) {
    if ( TEMPLATEPATH !== STYLESHEETPATH && file_exists( STYLESHEETPATH . '/functions.php' ) )
        include( STYLESHEETPATH . '/functions.php' );
    if ( file_exists( TEMPLATEPATH . '/functions.php' ) )
        include( TEMPLATEPATH . '/functions.php' );
}*/

do_action( 'after_setup_theme' );

// Load any template functions the theme supports.
//require_if_theme_supports( 'post-thumbnails', ABSPATH . WPINC . '/post-thumbnail-template.php' );

// Set up current user.
$wp->init();

/**
 * Most of WP is loaded at this stage, and the user is authenticated. WP continues
 * to load on the init hook that follows (e.g. widgets), and many plugins instantiate
 * themselves on it for all sorts of reasons (e.g. they need a user, a taxonomy, etc.).
 *
 * If you wish to plug an action once WP is loaded, use the wp_loaded hook below.
 */
do_action( 'init' );

// Check site status
if ( is_multisite() ) {
    if ( true !== ( $file = ms_site_check() ) ) {
        require( $file );
        die();
    }
    unset($file);
}

/**
 * This hook is fired once WP, all plugins, and the theme are fully loaded and instantiated.
 *
 * AJAX requests should use wp-admin/admin-ajax.php. admin-ajax.php can handle requests for
 * users not logged in.
 *
 * @link http://codex.wordpress.org/AJAX_in_Plugins
 *
 * @since 3.0.0
 */
do_action('wp_loaded');

endif;

//require( ABSPATH . WPINC . '/pluggable.php' );