<HTML ><HEAD ><TITLE >Header File Inclusions</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Source Discussion" HREF="zend.structure.html"><LINK REL="PREVIOUS" TITLE="Source Discussion" HREF="zend.structure.html"><LINK REL="NEXT" TITLE="Declaring Exported Functions" HREF="zend.structure.exporting-functions.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="section" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="zend.structure.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 31. Source Discussion</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="zend.structure.exporting-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="zend.structure.headers" ></A >Header File Inclusions</H1 ><P > The only header file you really have to include for your modules is <TT CLASS="filename" >php.h</TT >, located in the PHP directory. This file makes all macros and API definitions required to build new modules available to your code. </P ><P > <SPAN CLASS="emphasis" ><I CLASS="emphasis" >Tip:</I ></SPAN > 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 <TT CLASS="filename" >php.h</TT >. If you created your module using <TT CLASS="literal" >ext_skel</TT > you already have such a header file prepared. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="zend.structure.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="zend.structure.exporting-functions.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Source Discussion</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="zend.structure.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Declaring Exported Functions</TD ></TR ></TABLE ></DIV ></BODY ></HTML >