PHP: WP - Config file for working with Multiple Environments in WordPress

wp-config.php

<?php
/** Enable W3 Total Cache */
define('WP_CACHE', true); // Added by W3 Total Cache

/**
 * 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
 */


// Set your environment/url pairs
$environments = array(
  'development' => 'createdbyahha.dev',
  'staging'     => 'staging.createdbyahha.com',
  'production'  => 'createdbyahha.com'
);

// Get the hostname
$http_host = $_SERVER['HTTP_HOST'];

// Loop through $environments to see if there’s a match
foreach($environments as $environment => $hostname) {
  if (stripos($http_host, $hostname) !== FALSE) {
    define('ENVIRONMENT', $environment);
    break;
  }
}

// Exit if ENVIRONMENT is undefined
if (!defined('ENVIRONMENT')) exit('No database configured for this host');

// Location of environment-specific configuration
$wp_db_config = 'wp-config/wp-db-' . ENVIRONMENT . '.php'; 

// Check to see if the configuration file for the environment exists
if (file_exists(__DIR__ . '/' . $wp_db_config)) {
  require_once($wp_db_config);
} else {
  // Exit if configuration file does not exist
  exit('No database configuration found for this host');
}









/**#@+
 * 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.
 */
if (!defined('WP_DEBUG')) {
	define('WP_DEBUG', false);
}

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

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

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