<HTML ><HEAD ><TITLE >shuffle</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="Array Functions" 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=ISO-8859-1"></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 Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.rsort.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.sizeof.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.shuffle" ></A >shuffle</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN9187" ></A ><P > (PHP 3>= 3.0.8, PHP 4 )</P >shuffle -- Shuffle an array</DIV ><DIV CLASS="refsect1" ><A NAME="AEN9190" ></A ><H2 >Description</H2 >void <B CLASS="methodname" >shuffle</B > ( array array)<BR ></BR ><P > This function shuffles (randomizes the order of the elements in) an array. You must use <A HREF="function.srand.html" ><B CLASS="function" >srand()</B ></A > to seed this function. <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN9200" ></A ><P ><B >Example 1. <B CLASS="function" >shuffle()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >$numbers = range (1,20); srand ((float)microtime()*1000000); shuffle ($numbers); while (list (, $number) = each ($numbers)) { echo "$number "; }</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > See also <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 >, and <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" >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="function.sizeof.html" ACCESSKEY="N" >Next</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" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >sizeof</TD ></TR ></TABLE ></DIV ></BODY ></HTML >