Easy WP SSL configuration: HTTPS and HTTP with reverse proxying support

wp-config.php

<?php
/**
 * The base configurations of the WordPress.
 *
 * This file has the following configurations: MySQL settings, Table Prefix,
 * Secret Keys, WordPress Language, and ABSPATH. You can find more information
 * by visiting {@link http://codex.wordpress.org/Editing_wp-config.php Editing
 * wp-config.php} Codex page. You can get the MySQL settings from your web host.
 *
 * This file is used by the wp-config.php creation script during the
 * installation. You don't have to use the web site, you can just copy this file
 * to "wp-config.php" and fill in the values.
 *
 * @package WordPress
 */

// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define('DB_NAME', '');

/** MySQL database username */
define('DB_USER', '');

/** MySQL database password */
define('DB_PASSWORD', '');

/** MySQL hostname */
define('DB_HOST', 'localhost');

/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8');

/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');

/**#@+
 * Authentication Unique Keys and Salts.
 *
 * Change these to different unique phrases!
 * You can generate these using the {@link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
 * You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
 *
 * @since 2.6.0
 */
define('AUTH_KEY',         '');
define('SECURE_AUTH_KEY',  '');
define('LOGGED_IN_KEY',    '');
define('NONCE_KEY',        '');
define('AUTH_SALT',        '');
define('SECURE_AUTH_SALT', '');
define('LOGGED_IN_SALT',   '');
define('NONCE_SALT',       '');

/**#@-*/

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each a unique
 * prefix. Only numbers, letters, and underscores please!
 */
$table_prefix  = 'wp_';

/**
 * WordPress Localized Language, defaults to English.
 *
 * Change this to localize WordPress. A corresponding MO file for the chosen
 * language must be installed to wp-content/languages. For example, install
 * de_DE.mo to wp-content/languages and set WPLANG to 'de_DE' to enable German
 * language support.
 */
define('WPLANG', '');

/**
 * For developers: WordPress debugging mode.
 *
 * Change this to true to enable the display of notices during development.
 * It is strongly recommended that plugin and theme developers use WP_DEBUG
 * in their development environments.
 */
define('WP_DEBUG', false);

// Fix for CloudFlare SSL
if ( isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' )
    $_SERVER['HTTPS'] = 'on';

// URL scheme  for HTTP or HTTPS
$scheme = isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http';

// Define Site URL: WordPress in a subdirectory.
if ( ! defined( 'WP_SITEURL' ) )
	define( 'WP_SITEURL', $scheme . '://' . $_SERVER['HTTP_HOST'] . '/wordpress/' );

// Define Home URL
if ( ! defined( 'WP_HOME' ) )
	define( 'WP_HOME', $scheme . '://' . $_SERVER['HTTP_HOST'] );

// Define path & url for Content
define( 'WP_CONTENT_DIR', dirname(__FILE__) . '/www/wp-content' );
define( 'WP_CONTENT_URL', WP_HOME . '/wp-content' );

// Set path to MU Plugins.
define( 'WPMU_PLUGIN_DIR', dirname(__FILE__) . '/www/wp-content/mu-plugins' );
define( 'WPMU_PLUGIN_URL', WP_HOME . '/wp-content/mu-plugins' );

// Set path for uploads
//define( 'UPLOADS', dirname(__FILE__) . '/www/wp-uploads' );

// Set default permissions for uploads
// This is required since we run php as a different user than the httpd!
define( 'FS_CHMOD_DIR', ( 02750 & ~umask() ) );
define( 'FS_CHMOD_FILE', ( 0640 & ~ umask() ) );

// Set default theme.
//define( 'WP_DEFAULT_THEME', '' );

// Prevent editing of files through the admin.
define( 'DISALLOW_FILE_EDIT', true );

// Force SSL for admin/login
//define('FORCE_SSL_LOGIN', true);
define('FORCE_SSL_ADMIN', true);

// Disable WP Cron 
define('DISABLE_WP_CRON', true);

/* That's all, stop editing! Happy blogging. */

/** Absolute path to the WordPress directory. */
//if ( !defined('ABSPATH') )
//	define('ABSPATH', dirname(__FILE__) . '/www/wordpress/');

/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');

www | index.php

<?php
/**
 * Front to the WordPress application. This file doesn't do anything, but loads
 * wp-blog-header.php which does and tells WordPress to load the theme.
 *
 * @package WordPress
 */

/**
 * Tells WordPress to load the WordPress theme and output it.
 *
 * @var bool
 */
define('WP_USE_THEMES', true);

/** Loads the WordPress Environment and Template */
require('./wordpress/wp-blog-header.php');

www | wp-config.php

<?php

/** Absolute path to the WordPress directory. */
if ( !defined('ABSPATH') )
    define('ABSPATH', dirname(__FILE__) . '/wordpress/');

/** Location of your WordPress configuration. */
require_once(dirname(__FILE__) . '/../wp-config.php');

Of note this expects WordPress to have its own directory and for the main wp-config.php to be outside of the web accessible directory:

- wp-config.php
+ www/
  - www/index.php
  - www/wp-config.php
  - www/wordpress/
...

It will also force admin and login over HTTPS and beware the default file and directory permissions on uploads – depending on your httpd, php or hhvm configuration you might need to change this.