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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.array-intersect-uassoc">
<refnamediv>
<refname>array_intersect_uassoc</refname>
<refpurpose>Computes the intersection of arrays with additional index check, compares indexes by a callback function</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>array_intersect_uassoc</methodname>
<methodparam><type>array</type><parameter>array1</parameter></methodparam>
<methodparam><type>array</type><parameter>array2</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter> ...</parameter></methodparam>
<methodparam><type>callback</type><parameter>key_compare_func</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_intersect_uassoc</function> returns an array
containing all the values of <parameter>array1</parameter>
that are present in all the arguments. Note that the keys are used in
the comparison unlike in <function>array_intersect</function>.
</para>
<para>
The index comparison is done by a user supplied callback function.
It must return an integer less than, equal to, or greater than zero
if the first argument is considered to be respectively less than,
equal to, or greater than the second.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array1</parameter></term>
<listitem>
<para>
Initial array for comparison of the arrays.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>array2</parameter></term>
<listitem>
<para>
First array to compare keys against.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
Variable list of array arguments to compare values against.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>key_compare_func</parameter></term>
<listitem>
<para>
User supplied callback function to do the comparison.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the values of <parameter>array1</parameter> whose values exist
in all of the arguments.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>array_intersect_uassoc</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");
print_r(array_intersect_uassoc($array1, $array2, "strcasecmp"));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Array
(
[b] => brown
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>array_intersect</function></member>
<member><function>array_intersect_assoc</function></member>
<member><function>array_uintersect_assoc</function></member>
<member><function>array_uintersect_uassoc</function></member>
<member><function>array_intersect_key</function></member>
<member><function>array_intersect_ukey</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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