For almost every important task, Zend ships predefined
macros that are extremely handy. The tables and figures in
the following sections describe most of the basic functions,
structures, and macros. The macro definitions can be found
mainly in zend.h and zend_API.h. We suggest that you take a close
look at these files after having studied this chapter.
(Although you can go ahead and read them now, not everything
will make sense to you yet.)