$dev_names = array('localhost','.dev');

if ($_SERVER['SERVER_NAME'] == 'localhost')
 {
    define('ENVIRONMENT', 'development');
 }
 else
 {
    define('ENVIRONMENT', 'production');
 }

$_SERVER['SERVER_ADMIN'];

// environment development check
function __env_dev($check) {
  return substr($_SERVER['SERVER_ADMIN'], -(strlen($check))) === $check;
}
// false = production
// true = development
__env_dev("@dev.elop.loc");

<?php // global config file which is checked into VCS
    $SETTING = "FOO";
    @include "config/local_settings.php"; // overrides go here
 ?>