<HTML ><HEAD ><TITLE >HTTP functions</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="Function Reference" HREF="funcref.html"><LINK REL="PREVIOUS" TITLE="gmp_xor" HREF="function.gmp-xor.html"><LINK REL="NEXT" TITLE="header" HREF="function.header.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="reference" 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="function.gmp-xor.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.header.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="reference" ><A NAME="ref.http" ></A ><DIV CLASS="TITLEPAGE" ><H1 CLASS="title" >XXXVII. HTTP functions</H1 ><DIV CLASS="PARTINTRO" ><A NAME="AEN30440" ></A ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="http.intro" ></A >Introduction</H1 ><P > These functions let you manipulate the output sent back to the remote browser right down to the HTTP protocol level. </P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="http.requirements" ></A >Requirements</H1 ><P >No external libraries are needed to build this extension.</P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="http.installation" ></A >Installation</H1 ><P >There is no installation needed to use these functions; they are part of the PHP core.</P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="http.configuration" ></A >Runtime Configuration</H1 ><P >This extension has no configuration directives defined in <TT CLASS="filename" >php.ini</TT >.</P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="http.resources" ></A >Resource Types</H1 ><P >This extension has no resource types defined.</P ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="http.constants" ></A >Predefined Constants</H1 ><P >This extension has no constants defined.</P ></DIV ></DIV ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT ><A HREF="function.header.html" >header</A > -- Send a raw HTTP header</DT ><DT ><A HREF="function.headers-sent.html" >headers_sent</A > -- Checks if or where headers have been sent</DT ><DT ><A HREF="function.setcookie.html" >setcookie</A > -- Send a cookie</DT ></DL ></DIV ></DIV ></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="function.gmp-xor.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="function.header.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >gmp_xor</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="funcref.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >header</TD ></TR ></TABLE ></DIV ></BODY ></HTML >