Theme developer's guide (v5 and earlier)

This section of our handbook documents aspects of our theme system that will be of interest to theme developers.

An important note- when developing a theme using any of the methods described here, you must be sure that the name of the theme is not the same as the name of any module being used on the site because the function names may collide and your site may no longer function correctly.

Javascript snippets (for theming, etc.) can be found in the Javascript section.
PHP theming snippets can be found in Beyond the basics - Snippets.
See also Beyond the basics - Theme HowTos.