<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >reset</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="Array 数组函数" HREF="ref.array.html"><LINK REL="PREVIOUS" TITLE="range" HREF="function.range.html"><LINK REL="NEXT" TITLE="rsort" HREF="function.rsort.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" 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="function.range.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.rsort.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.reset" ></A >reset</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN13428" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >reset -- 将数组的内部指针指向第一个单元</DIV ><DIV CLASS="refsect1" ><A NAME="AEN13431" ></A ><H2 >说明</H2 >mixed <B CLASS="methodname" >reset</B > ( array &array )<BR ></BR ><P > <B CLASS="function" >reset()</B > 将 <CODE CLASS="parameter" >array</CODE > 的内部指针倒回到第一个单元并返回第一个数组单元的值,如果数组为空则返回 <TT CLASS="constant" ><B >FALSE</B ></TT >。 </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN13444" ></A ><P ><B >例 1. <B CLASS="function" >reset()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /><br />$array </font><font color="#007700">= array(</font><font color="#DD0000">'step one'</font><font color="#007700">, </font><font color="#DD0000">'step two'</font><font color="#007700">, </font><font color="#DD0000">'step three'</font><font color="#007700">, </font><font color="#DD0000">'step four'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// by default, the pointer is on the first element<br /></font><font color="#007700">echo </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">) . </font><font color="#DD0000">"<br />\n"</font><font color="#007700">; </font><font color="#FF8000">// "step one"<br /><br />// skip two steps<br /></font><font color="#0000BB">next</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">);<br /></font><font color="#0000BB">next</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">);<br />echo </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">) . </font><font color="#DD0000">"<br />\n"</font><font color="#007700">; </font><font color="#FF8000">// "step three"<br /><br />// reset pointer, start again on step one<br /></font><font color="#0000BB">reset</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">);<br />echo </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">) . </font><font color="#DD0000">"<br />\n"</font><font color="#007700">; </font><font color="#FF8000">// "step one"<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > 参见 <A HREF="function.current.html" ><B CLASS="function" >current()</B ></A >,<A HREF="function.each.html" ><B CLASS="function" >each()</B ></A >,<A HREF="function.end.html" ><B CLASS="function" >end()</B ></A >,<A HREF="function.next.html" ><B CLASS="function" >next()</B ></A > 和 <A HREF="function.prev.html" ><B CLASS="function" >prev()</B ></A >。 </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="function.range.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="function.rsort.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >range</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.array.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >rsort</TD ></TR ></TABLE ></DIV ></BODY ></HTML >