Now that you've got a safe build environment and you're able to include the modules into PHP files, it's time to discuss how everything works.
All PHP modules follow a common structure:
Header file inclusions (to include all required macros, API definitions, etc.)
C declaration of exported functions (required to declare the Zend function block)
Declaration of the Zend function block
Declaration of the Zend module block
Implementation of get_module()()
Implementation of all exported functions