<HTML ><HEAD ><TITLE >uasort</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.44"><LINK REL="HOME" TITLE="PHP Manual" HREF="manual.html"><LINK REL="UP" TITLE="Array functions" HREF="ref.array.html"><LINK REL="PREVIOUS" TITLE="sort" HREF="function.sort.html"><LINK REL="NEXT" TITLE="uksort" HREF="function.uksort.html"></HEAD ><BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><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.sort.html" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.uksort.html" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.uasort" >uasort</A ></H1 ><DIV CLASS="refnamediv" ><A NAME="AEN4447" ></A >uasort -- Sort an array with a user-defined comparison function and maintain index association </DIV ><DIV CLASS="refsect1" ><A NAME="AEN4450" ></A ><H2 >Description</H2 ><DIV CLASS="funcsynopsis" ><P ></P ><CODE CLASS="FUNCDEF" >void uasort</CODE >(array array, function cmp_function);<P ></P ></DIV ><P > This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. The comparison function is user-defined. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.sort.html" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="manual.html" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.uksort.html" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >sort</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.array.html" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >uksort</TD ></TR ></TABLE ></DIV ></BODY ></HTML >