Macros
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.)