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<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision: 297078 $ -->
<refentry xml:id="function.class-implements" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>class_implements</refname>
<refpurpose>
Return the interfaces which are implemented by the given class
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>class_implements</methodname>
<methodparam><type>mixed</type><parameter>class</parameter></methodparam>
<methodparam choice="opt"><type>bool</type><parameter>autoload</parameter><initializer>true</initializer></methodparam>
</methodsynopsis>
<para>
This function returns an array with the names of the interfaces that the
given <parameter>class</parameter> and its parents implement.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>class</parameter></term>
<listitem>
<para>
An object (class instance) or a string (class name).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>autoload</parameter></term>
<listitem>
<para>
Whether to allow this function to load the class automatically through
the <link linkend="language.oop5.autoload">__autoload</link> magic
method.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
An array on success, or &false; on error.
</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>5.1.0</entry>
<entry>
Added the option to pass the <parameter>class</parameter> parameter as
a string. Added the <parameter>autoload</parameter> parameter.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>class_implements</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
interface foo { }
class bar implements foo {}
print_r(class_implements(new bar));
// since PHP 5.1.0 you may also specify the parameter as a string
print_r(class_implements('bar'));
function __autoload($class_name) {
require_once $class_name . '.php';
}
// use __autoload to load the 'not_loaded' class
print_r(class_implements('not_loaded', true));
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
Array
(
[foo] => foo
)
Array
(
[interface_of_not_loaded] => interface_of_not_loaded
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>class_parents</function></member>
<member><function>get_declared_interfaces</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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