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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.arsort" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>arsort</refname>
<refpurpose>Sort an array in descending order and maintain index association</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>true</type><methodname>arsort</methodname>
<methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>flags</parameter><initializer><constant>SORT_REGULAR</constant></initializer></methodparam>
</methodsynopsis>
<para>
Sorts <parameter>array</parameter> in place in descending order,
such that its keys maintain their correlation with the values they
are associated with.
</para>
<para>
This is used mainly when sorting associative arrays where the actual
element order is significant.
</para>
¬e.sort-unstable;
¬e.reset-index;
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
The input array.
</para>
</listitem>
</varlistentry>
&sort.flags.parameter;
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.true.always;
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&return.type.true;
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>arsort</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
arsort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
a = orange
d = lemon
b = banana
c = apple
]]>
</screen>
<para>
The fruits have been sorted in reverse alphabetical order, and
the index associated with each element has been maintained.
</para>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>sort</function></member>
<member><function>asort</function></member>
<member>&seealso.array.sorting;</member>
</simplelist>
</refsect1>
</refentry>
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