Multi Environment wp-config.php

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
 */

    // Define Environments - may be a string or array of options for an environment
    // Production is not in environments array but enabled when an enviroment is not defined see below
    $environments = array(
        'local'       => array('localhost', 'local'),
        'staging'     => array('dev', 'staging'),
    );

    // Get Server name
    $server_name = $_SERVER['SERVER_NAME'];

    foreach($environments AS $key => $env){

        if(is_array($env)){

            foreach ($env as $option){

                if(stristr($server_name, $option)){

                    define('ENVIRONMENT', $key);

                    break 2;
                }

            }

        } else {

            if(stristr($server_name, $env)){

                define('ENVIRONMENT', $key);

                break;

            }

        }

    }

    // If no environment is set default to production
    if(!defined('ENVIRONMENT')) define('ENVIRONMENT', 'production');

    // Define different DB connection details depending on environment
    switch(ENVIRONMENT){

        case 'local':

            define('DB_NAME', '');
            define('DB_USER', '');
            define('DB_PASSWORD', '');
            define('DB_HOST', 'localhost');
            define('WP_DEBUG', true);

            break;

        case 'staging':

            define('DB_NAME', '');
            define('DB_USER', '');
            define('DB_PASSWORD', '');
            define('DB_HOST', 'localhost');
            define('WP_DEBUG', true);

            break;

    }

     // Production *live site**
    // ** MySQL settings - You can get this info from your web host ** //
    if(!defined('DB_NAME'))
        define('DB_NAME', 'database_name_here');

    if(!defined('DB_USER'))
        define('DB_USER', 'username_here');

    if(!defined('DB_PASSWORD'))
        define('DB_PASSWORD', 'password_here');

    if(!defined('DB_HOST'))
        define('DB_HOST', 'localhost');

    if(!defined('DB_CHARSET'))
        define('DB_CHARSET', 'utf8');

    if(!defined('DB_COLLATE'))
        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',         'put your unique phrase here');
define('SECURE_AUTH_KEY',  'put your unique phrase here');
define('LOGGED_IN_KEY',    'put your unique phrase here');
define('NONCE_KEY',        'put your unique phrase here');
define('AUTH_SALT',        'put your unique phrase here');
define('SECURE_AUTH_SALT', 'put your unique phrase here');
define('LOGGED_IN_SALT',   'put your unique phrase here');
define('NONCE_SALT',       'put your unique phrase here');

/**#@-*/

/**
 * 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');