Header File Inclusions

The only header file you really have to include for your modules is php.h , located in the PHP directory. This file makes all macros and API definitions required to build new modules available to your code.

Tip: It's good practice to create a separate header file for your module that contains module-specific definitions. This header file should contain all the forward definitions for exported functions and include php.h . If you created your module using ext_skel you already have such a header file prepared.