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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.9 $ -->
<!-- splitted from ./en/functions/array.xml, last change in rev 1.25 -->
<refentry id="function.natcasesort">
<refnamediv>
<refname>natcasesort</refname>
<refpurpose>
Sort an array using a case insensitive "natural order" algorithm
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>bool</type><methodname>natcasesort</methodname>
<methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
</methodsynopsis>
<para>
This function implements a sort algorithm that orders
alphanumeric strings in the way a human being would while maintaining
key/value associations. This is described as a "natural ordering".
</para>
<para>
&return.success;
</para>
<para>
<function>natcasesort</function> is a case insensitive version of
<function>natsort</function>.
</para>
<para>
<example>
<title><function>natcasesort</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$array1 = $array2 = array('IMG0.png', 'img12.png', 'img10.png', 'img2.png', 'img1.png', 'IMG3.png');
sort($array1);
echo "Standard sorting\n";
print_r($array1);
natcasesort($array2);
echo "\nNatural order sorting (case-insensitive)\n";
print_r($array2);
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Standard sorting
Array
(
[0] => IMG0.png
[1] => IMG3.png
[2] => img1.png
[3] => img10.png
[4] => img12.png
[5] => img2.png
)
Natural order sorting (case-insensitive)
Array
(
[0] => IMG0.png
[4] => img1.png
[3] => img2.png
[5] => IMG3.png
[2] => img10.png
[1] => img12.png
)
]]>
</screen>
<para>
For more information see: Martin Pool's <ulink
url="&url.strnatcmp;">Natural Order String Comparison</ulink>
page.
</para>
</example>
</para>
<para>
See also <function>sort</function>,
<function>natsort</function>,
<function>strnatcmp</function>, and
<function>strnatcasecmp</function>.
</para>
</refsect1>
</refentry>
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