Functions.php as a plugin
An idea and full explanation (by Justin Tadlock).
<?php /** * Plugin Name: My Custom Functions * Plugin URI: http://yoursite.com * Description: This is an awesome custom plugin with functionality that I'd like to keep when switching things. * Author: Your Name * Author URI: http://yoursite.com * Version: 0.1.0 */ /* Place custom code below this line. */ /* Place custom code above this line. */ ?>