Conditional DB Secting in wp-config.php for maintaining WordPress from Development Server and Pushing to Production Server

wp-config-partial.php

<?php

/*
 * Unified variables
 */
$charset = 'UTF-8';
$collate = '';

/*
 * Set variables conditianlly based on current environment
 */
if ( $_SERVER["HTTP_HOST"] === 'productionserver.com' ) {
  $user_name = 'production_database_user_name';
  $hostname = 'production_database_host_name';
  $db_name = 'production_database_name';
  $password = 'production_database_password';
} else if ( $_SERVER["HTTP_HOST"] === 'devserver.com' ) { // e.g. 'localhost' for local development
  $user_name = 'dev_database_user_name';
  $hostname = 'dev_database_host_name';
  $db_name = 'dev_database_name';
  $password = 'dev_database_password';
}

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

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

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

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

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

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

Hi! So this is how one might conditionally define the DB_HOST for WordPress? I have a local copy of several blogs, and a remotely hosted copy. Thanks!