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