<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >shuffle</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="rsort" HREF="function.rsort.html"><LINK REL="NEXT" TITLE="sizeof" HREF="function.sizeof.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.rsort.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.sizeof.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.shuffle" ></A >shuffle</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN13495" ></A ><P > (PHP 3 >= 3.0.8, PHP 4, PHP 5)</P >shuffle -- 将数组打乱</DIV ><DIV CLASS="refsect1" ><A NAME="AEN13498" ></A ><H2 >说明</H2 >bool <B CLASS="methodname" >shuffle</B > ( array &array )<BR ></BR ><P > 本函数打乱(随机排列单元的顺序)一个数组。 </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B >本函数为 <CODE CLASS="parameter" >array</CODE > 中的单元赋予新的键名。这将删除原有的键名而不仅是重新排序。</P ></BLOCKQUOTE ></DIV ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN13511" ></A ><P ><B >例 1. <B CLASS="function" >shuffle()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$numbers </font><font color="#007700">= </font><font color="#0000BB">range</font><font color="#007700">(</font><font color="#0000BB">1</font><font color="#007700">,</font><font color="#0000BB">20</font><font color="#007700">);<br /></font><font color="#0000BB">srand</font><font color="#007700">((float)</font><font color="#0000BB">microtime</font><font color="#007700">()*</font><font color="#0000BB">1000000</font><font color="#007700">);<br /></font><font color="#0000BB">shuffle</font><font color="#007700">(</font><font color="#0000BB">$numbers</font><font color="#007700">);<br />foreach (</font><font color="#0000BB">$numbers </font><font color="#007700">as </font><font color="#0000BB">$number</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"$number "</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B >自 PHP 4.2.0 起,不再需要用 <A HREF="function.srand.html" ><B CLASS="function" >srand()</B ></A > 或 <A HREF="function.mt-srand.html" ><B CLASS="function" >mt_srand()</B ></A > 函数给随机数发生器播种,现已自动完成。</P ></BLOCKQUOTE ></DIV ><P > 参见 <A HREF="function.arsort.html" ><B CLASS="function" >arsort()</B ></A >,<A HREF="function.asort.html" ><B CLASS="function" >asort()</B ></A >,<A HREF="function.ksort.html" ><B CLASS="function" >ksort()</B ></A >,<A HREF="function.rsort.html" ><B CLASS="function" >rsort()</B ></A >,<A HREF="function.sort.html" ><B CLASS="function" >sort()</B ></A > 和 <A HREF="function.usort.html" ><B CLASS="function" >usort()</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.rsort.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.sizeof.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >rsort</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" >sizeof</TD ></TR ></TABLE ></DIV ></BODY ></HTML >