<HTML ><HEAD ><TITLE >Running PHP 3 and PHP 4 concurrently</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="Migrating from PHP 3 to PHP 4" HREF="migration4.html"><LINK REL="PREVIOUS" TITLE="Migrating from PHP 3 to PHP 4" HREF="migration4.html"><LINK REL="NEXT" TITLE="Migrating Configuration Files" HREF="migration4.configuration.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="migration4.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Appendix B. Migrating from PHP 3 to PHP 4</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="migration4.configuration.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="migration4.php4.with.php3" ></A >Running PHP 3 and PHP 4 concurrently</H1 ><P > Recent operating systems provide the ability to perform versioning and scoping. This features make it possible to let PHP 3 and PHP 4 run as concurrent modules in one Apache server. </P ><P > This feature is known to work on the following platforms: </P ><P ></P ><UL ><LI ><P >Linux with recent binutils (binutils 2.9.1.0.25 tested) </P ></LI ><LI ><P >Solaris 2.5 or better</P ></LI ><LI ><P >FreeBSD (3.2, 4.0 tested)</P ></LI ></UL ><P > To enable it, configure PHP3 and PHP4 to use APXS (--with-apxs) and the necessary link extensions (--enable-versioning). Otherwise, all standard installations instructions apply. For example: <DIV CLASS="informalexample" ><A NAME="AEN104076" ></A ><P ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="configure" >$ ./configure \ --with-apxs=/apache/bin/apxs \ --enable-versioning \ --with-mysql \ --enable-track-vars</PRE ></TD ></TR ></TABLE ><P ></P ></DIV > </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="migration4.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="migration4.configuration.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Migrating from PHP 3 to PHP 4</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="migration4.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Migrating Configuration Files</TD ></TR ></TABLE ></DIV ></BODY ></HTML >