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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.11 $ -->
<!-- splitted from ./en/functions/array.xml, last change in rev 1.113 -->
<refentry id="function.array-change-key-case">
<refnamediv>
<refname>array_change_key_case</refname>
<refpurpose>Returns an array with all string keys lowercased or uppercased</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>array</type><methodname>array_change_key_case</methodname>
<methodparam><type>array</type><parameter>input</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>case</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_change_key_case</function> changes the
keys in the <parameter>input</parameter> array to
be all lowercase or uppercase. The change depends
on the last optional <parameter>case</parameter>
parameter. You can pass two constants there,
<constant>CASE_UPPER</constant> and
<constant>CASE_LOWER</constant>. The default is
<constant>CASE_LOWER</constant>. The function will leave
number indices as is.
</para>
<example>
<title><function>array_change_key_case</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$input_array = array("FirSt" => 1, "SecOnd" => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Array
(
[FIRST] => 1
[SECOND] => 4
)
]]>
</screen>
</example>
<para>
If an array has indices that will be the same once run through this
function (e.g. "keY" and "kEY"), the value that is later in the array
will override other indices.
</para>
</refsect1>
</refentry>
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