<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML ><HEAD ><TITLE >Migrating from PHP 4 to PHP 5</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Manual PHP" HREF="index.html"><LINK REL="UP" TITLE="Anexe" HREF="appendixes.html"><LINK REL="PREVIOUS" TITLE="Publications about PHP" HREF="history.php.publications.html"><LINK REL="NEXT" TITLE="Backward Incompatible Changes" HREF="migration5.incompatible.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-2"></HEAD ><BODY CLASS="appendix" 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" >Manual PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="history.php.publications.html" ACCESSKEY="P" >Înapoi</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="migration5.incompatible.html" ACCESSKEY="N" >Înainte</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="appendix" ><H1 ><A NAME="migration5" >Anexa B. Migrating from PHP 4 to PHP 5</A ></H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Cuprins</B ></DT ><DT ><A HREF="migration5.html#migration5.changes" >What has changed in PHP 5</A ></DT ><DT ><A HREF="migration5.incompatible.html" >Backward Incompatible Changes</A ></DT ><DT ><A HREF="migration5.cli-cgi.html" >CLI and CGI</A ></DT ><DT ><A HREF="migration5.configuration.html" >Migrating Configuration Files</A ></DT ><DT ><A HREF="migration5.functions.html" >New Functions</A ></DT ><DT ><A HREF="migration5.newconf.html" >New Directives</A ></DT ><DT ><A HREF="migration5.databases.html" >Databases</A ></DT ><DT ><A HREF="migration5.oop.html" >New Object Model</A ></DT ><DT ><A HREF="migrating5.errorrep.html" >Error Reporting</A ></DT ></DL ></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="migration5.changes" >What has changed in PHP 5</A ></H1 ><P > PHP 5 and the integrated Zend Engine 2 have greatly improved PHP's performance and capabilities, but great care has been taken to break as little existing code as possible. So migrating your code from PHP 4 to 5 should be very easy. Most existing PHP 4 code should be ready to run without changes, but you should still know about the <A HREF="migration5.incompatible.html" >few differences</A > and take care to test your code before switching versions in production environments. </P ></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="history.php.publications.html" ACCESSKEY="P" >Înapoi</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Acasã</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="migration5.incompatible.html" ACCESSKEY="N" >Înainte</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Publications about PHP</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="appendixes.html" ACCESSKEY="U" >Sus</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Backward Incompatible Changes</TD ></TR ></TABLE ></DIV ></BODY ></HTML >