<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >if..endif 语法</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="从 PHP/FI 2 移植到 PHP 3" HREF="migration.html"><LINK REL="PREVIOUS" TITLE="开始/结束标记" HREF="migration.startendtags.html"><LINK REL="NEXT" TITLE="while 语法" HREF="migration.while.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></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 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="migration.startendtags.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >附录 E. 从 PHP/FI 2 移植到 PHP 3</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="migration.while.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="migration.if-endif" >if..endif 语法</A ></H1 ><P > 使用 if(); elseif(); else; endif; 这一系列复杂的语句无助于 PHP 3.0 解析器的效率。因此，语法改变为： <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN290759" ></A ><P ><B >例 E-5. 移植：旧有 if..endif 语法</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> if ($foo);<br /> echo "yep\n";<br />elseif ($bar);<br /> echo "almost\n";<br />else;<br /> echo "nope\n";<br />endif;</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN290762" ></A ><P ><B >例 E-6. 移植：新的 if..endif 语法</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> if ($foo):<br /> echo "yep\n";<br />elseif ($bar):<br /> echo "almost\n";<br />else:<br /> echo "nope\n";<br />endif;</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > 注意，在所有的声明中分号均改为冒号，除了末尾的 endif 以外。 </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="migration.startendtags.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="migration.while.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >开始/结束标记</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="migration.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >while 语法</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
