<HTML ><HEAD ><TITLE >ksort</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="krsort" HREF="function.krsort.html"><LINK REL="NEXT" TITLE="list" HREF="function.list.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.krsort.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.list.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.ksort" ></A >ksort</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN8884" ></A ><P > (PHP 3, PHP 4 )</P >ksort -- Sort an array by key</DIV ><DIV CLASS="refsect1" ><A NAME="AEN8887" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >ksort</B > ( array array [, int sort_flags])<BR ></BR ><P > Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays. <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN8899" ></A ><P ><B >Example 1. <B CLASS="function" >ksort()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >$fruits = array ("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); ksort ($fruits); reset ($fruits); while (list ($key, $val) = each ($fruits)) { echo "$key = $val\n"; }</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > This example would display: </P ><P > <TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >a = orange b = banana c = apple d = lemon</PRE ></TD ></TR ></TABLE > </P ><P > You may modify the behavior of the sort using the optional parameter <TT CLASS="parameter" ><I >sort_flags</I ></TT >, for details see <A HREF="function.sort.html" ><B CLASS="function" >sort()</B ></A >. </P ><P > See also <A HREF="function.asort.html" ><B CLASS="function" >asort()</B ></A >, <A HREF="function.arsort.html" ><B CLASS="function" >arsort()</B ></A >, <A HREF="function.krsort.html" ><B CLASS="function" >krsort()</B ></A >, <A HREF="function.uksort.html" ><B CLASS="function" >uksort()</B ></A >, <A HREF="function.sort.html" ><B CLASS="function" >sort()</B ></A >, <A HREF="function.natsort.html" ><B CLASS="function" >natsort()</B ></A >, and <A HREF="function.rsort.html" ><B CLASS="function" >rsort()</B ></A >. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > The second parameter was added in PHP 4. </P ></BLOCKQUOTE ></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="function.krsort.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.list.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >krsort</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" >list</TD ></TR ></TABLE ></DIV ></BODY ></HTML >