php-doc-en/reference/array/functions/asort.xml
Daniel Egeberg 96c9d88bad Converted to utf-8
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2010-03-28 22:10:10 +00:00

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XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.asort" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>asort</refname>
<refpurpose>Sort an array and maintain index association</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>asort</methodname>
<methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>sort_flags</parameter><initializer>SORT_REGULAR</initializer></methodparam>
</methodsynopsis>
<para>
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.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
The input array.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>sort_flags</parameter></term>
<listitem>
<para>
You may modify the behavior of the sort using the optional
parameter <parameter>sort_flags</parameter>, for details
see <function>sort</function>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>asort</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
asort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
c = apple
b = banana
d = lemon
a = orange
]]>
</screen>
<para>
The fruits have been sorted in alphabetical order, and the index
associated with each element has been maintained.
</para>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>arsort</function></member>
<member>&seealso.array.sorting;</member>
</simplelist>
</para>
</refsect1>
</refentry>
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