You've learned a lot about PHP_ You now know how to create
dynamic loadable modules and statically linked extensions_ You've
learned how PHP and Zend deal with internal storage of variables and how you
can create and access these variables_ You know quite a set of tool functions
that do a lot of routine tasks such as printing informational texts,
automatically introducing variables to the symbol table, and so on_
Even though this chapter often had a mostly "referential" character, we
hope that it gave you insight on how to start writing your own extensions_
For the sake of space, we had to leave out a lot; we suggest that you take the time to
study the header files and some modules (especially the ones in the
ext/standard directory and the MySQL module, as these
implement commonly known functionality)_ This will give you an idea of how
other people have used the API functions _ particularly those that didn't make it into
this chapter_