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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.array-merge-recursive">
<refnamediv>
<refname>array_merge_recursive</refname>
<refpurpose>Merge one or more arrays recursively</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>array_merge_recursive</methodname>
<methodparam rep="repeat"><type>array</type><parameter>arrays</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_merge_recursive</function> merges the elements of
one or more arrays together so that the values of one are appended
to the end of the previous one. It returns the resulting array.
</para>
<para>
If the input arrays have the same string keys, then the values for
these keys are merged together into an array, and this is done
recursively, so that if one of the values is an array itself, the
function will merge it with a corresponding entry in another array
too. If, however, the arrays have the same numeric key, the later
value will not overwrite the original value, but will be appended.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>arrays</parameter></term>
<listitem>
<para>
Variable list of arrays to recursively merge.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
An array of values resulted from merging the arguments together.
If called without any arguments, returns an empty &array;.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>7.4.0</entry>
<entry>
This function can now be called without any parameter.
Formerly, at least one parameter has been required.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>array_merge_recursive</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$ar1 = array("color" => array("favorite" => "red"), 5);
$ar2 = array(10, "color" => array("favorite" => "green", "blue"));
$result = array_merge_recursive($ar1, $ar2);
print_r($result);
?>
]]>
</programlisting>
&example.outputs;
<screen role="php">
<![CDATA[
Array
(
[color] => Array
(
[favorite] => Array
(
[0] => red
[1] => green
)
[0] => blue
)
[0] => 5
[1] => 10
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>array_merge</function></member>
<member><function>array_replace_recursive</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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