Page render drill down in Drupal 7

Join Moshe Weitzman for deep dive into the page render system for Drupal 7. We'll learn how to build and theme a standard page callback. Then we'll evaluate various alternatives for modifying the page, to meet some hypothetical user experience requirements. Learn more about:

1. Build a drupal_render() array in a menu callback. Learn to differentiate between key properties such as #type, #theme, #theme_wrappers, #pre_render, ...
2. Change the $page during hook_page_alter(). Move some blocks, alter text, etc.
3. Make changes during the preprocess and process stages of page themeing
4. Use theme_hook_suggestions to route themeing to alternate templates and theme functions.
5. Alter the theme registry for hostile takeover of theme hooks.