In this chapter, we have reviewed many of the changes to the Drupal API including coverage of the methods which been added, changed, or removed from the API. Throughout the chapter, we have looked at the API in terms of upgrading your existing modules and site code to Drupal 7.
We have now reached the end of the book. I hope that you have enjoyed learning all about the new features and functionality that have been added to Drupal 7, and that you agree that Drupal 7 is a truly impressive release that will make your site easier to build, more powerful, and more secure.
You should now be well prepared to upgrade your Drupal 6 sites to Drupal 7 and begin building new sites with Drupal 7. For more information on building sites with Drupal 7, check out the official Drupal site at http://drupal.org or look at the other great books about Drupal from Packt Publishing at http://www.packtpub.com/drupal-books.