WP Config for multiple environments. Code is for this blog post: http://abandon.ie/wordpress-configuration-for-multiple-environments/

cookie.php

<?php
function require_cookie()
{
    if(isset($_GET['preview']))
    {
        setcookie('preview', 'yes', time()+604800, '/');
        header('Location: /');
        exit;
    }
 
    if(ENVIRONMENT == 'preview' && (!isset($_COOKIE['preview']) || $_COOKIE['preview'] != "yes"))
    {
        wp_redirect( 'http://www.google.com', 302 );
        exit;
    }
}
if(!is_admin()) add_action('init', 'require_cookie');

databases.php

<?php
// Define different DB connection details depending on environment
switch(ENVIRONMENT){
    case 'local':
        define('DB_NAME', 'bootstrap');
        define('DB_USER', 'root');
        define('DB_PASSWORD', 'root');
        define('DB_HOST', 'localhost');
        define('WP_DEBUG', true);
        define('WP_SITEURL', 'http://bootstrap.local/');
        define('WP_HOME', 'http://bootstrap.local/');
        break;
 
    case 'development':
 
        define('DB_NAME', 'bootstrap');
        define('DB_USER', 'root');
        define('DB_PASSWORD', 'root');
        define('DB_HOST', 'localhost');
        define('WP_DEBUG', true);
        break;
 
    case 'staging':
 
        define('DB_NAME', 'database_name_here');
        define('DB_USER', 'username_here');
        define('DB_PASSWORD', 'password_here');
        define('DB_HOST', 'localhost');
        break;
 
    case 'preview':
 
        define('DB_NAME', 'database_name_here');
        define('DB_USER', 'username_here');
        define('DB_PASSWORD', 'password_here');
        define('DB_HOST', 'localhost');
        break;
}
 
// If database isn't defined then it will be defined here.
// Put the details for your production environment in here.
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', '');

environments.php

<?php
// Define Environments
$environments = array(
    'local' => '.local',
    'development' => '.dev',
    'staging' => 'stage.',
    'preview' => 'preview.',
);
// Get Server name
$server_name = $_SERVER['SERVER_NAME'];
 
foreach($environments AS $key => $env){
    if(strstr($server_name, $env)){
        define('ENVIRONMENT', $key);
        break;
    }
}
 
// If no environment is set default to production
if(!defined('ENVIRONMENT')) define('ENVIRONMENT', 'production');

is-production.php

<?php
function is_production(){
    if(ENVIRONMENT == 'production'){
        return true;
    }else{
        return false;
    }
}

less-sass.html

<?php if(!is_production()): ?>
  <script type="text/javascript">// <![CDATA[
    var less = { env: 'development' };
  // ]]></script>
  <script type="text/javascript" src="<?php bloginfo('template_directory'); ?>/assets/js/libs/less-1.3.0.min.js"></script>
  <script charset="utf-8" type="text/javascript">// <![CDATA[
     less.watch();
  // ]]></script>
<?php else: ?>
 
<?php endif; ?>

pw.php

<?php
function password_protected(){
    if(!is_user_logged_in() && (ENVIRONMENT == 'development' || ENVIRONMENT == 'staging')){
        wp_redirect(get_option('siteurl') .'/wp-login.php');
    }
}
add_action('template_redirect', 'password_protected');

robots.php

<?php
function robots_access(){
    if(is_production() && get_option('blog_public') == '0') update_option('blog_public', '1');
    if(!is_production() && get_option('blog_public') == '1') update_option('blog_public', '0');
}
add_action('init', 'robots_access');