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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id="function.array-replace-recursive" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>array_replace_recursive</refname>
<refpurpose>Replaces elements from passed arrays into the first array recursively</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>array_replace_recursive</methodname>
<methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
<methodparam><type>array</type><parameter role="reference">array1</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter role="reference">array2</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter role="reference">...</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_replace_recursive</function> replaces the values of the first
<parameter>array</parameter> with the same values from all the following
arrays. If a key from the first array exists in the second array, its value
will be replaced by the value from the second array. If the key exists in the
second array, and not the first, it will be created in the first array.
If a key only exists in the first array, it will be left as is.
If several arrays are passed for replacement, they will be processed
in order, the later array overwriting the previous values.
</para>
<para>
<function>array_replace_recursive</function> is recursive : it will recurse into
arrays and apply the same process to the inner value.
</para>
<para>
When the value in <parameter>array</parameter> is scalar, it will be replaced
by the value in <parameter>array1</parameter>, may it be scalar or array.
When the value in <parameter>array</parameter> and <parameter>array1</parameter>
are both arrays, <function>array_replace_recursive</function> will replace
their respective value recursively.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
The array in which elements are replaced.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>array1</parameter></term>
<listitem>
<para>
The array from which elements will be extracted.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an <type>array</type>, or &null; if an error occurs.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>array_replace_recursive</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$base = array('citrus' => array( "orange") , 'berries' => array("blackberry", "raspberry"), );
$replacements = array('citrus' => array('pineapple'), 'berries' => array('blueberry'));
$basket = array_replace_recursive($base, $replacements);
print_r($basket);
$basket = array_replace($base, $replacements);
print_r($basket);
?>
]]>
</programlisting>
&example.outputs;
<screen role="php">
<![CDATA[
Array
(
[citrus] => Array
(
[0] => pineapple
)
[berries] => Array
(
[0] => blueberry
[1] => raspberry
)
)
Array
(
[citrus] => Array
(
[0] => pineapple
)
[berries] => Array
(
[0] => blueberry
)
)
]]>
</screen>
</example>
<example>
<title><function>array_replace_recursive</function> and recursive behavior</title>
<programlisting role="php">
<![CDATA[
<?php
$base = array('citrus' => array("orange") , 'berries' => array("blackberry", "raspberry"), 'others' => 'banana' );
$replacements = array('citrus' => 'pineapple', 'berries' => array('blueberry'), 'others' => array('litchis'));
$replacements2 = array('citrus' => array('pineapple'), 'berries' => array('blueberry'), 'others' => 'litchis');
$basket = array_replace_recursive($base, $replacements, $replacements2);
print_r($basket);
?>
]]>
</programlisting>
&example.outputs;
<screen role="php">
<![CDATA[
Array
(
[citrus] => Array
(
[0] => pineapple
)
[berries] => Array
(
[0] => blueberry
[1] => raspberry
)
[others] => litchis
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>array_replace</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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