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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.method-exists" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>method_exists</refname>
<refpurpose>Checks if the class method exists</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>method_exists</methodname>
<methodparam><type class="union"><type>object</type><type>string</type></type><parameter>object_or_class</parameter></methodparam>
<methodparam><type>string</type><parameter>method</parameter></methodparam>
</methodsynopsis>
<para>
Checks if the class method exists in the given
<parameter>object_or_class</parameter>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>object_or_class</parameter></term>
<listitem>
<para>
An object instance or a class name
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>method</parameter></term>
<listitem>
<para>
The method name
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns &true; if the method given by <parameter>method</parameter>
has been defined for the given <parameter>object_or_class</parameter>, &false;
otherwise.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>7.4.0</entry>
<entry>
Class checks against inherited private methods now return <parameter>false</parameter>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>method_exists</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$directory = new Directory('.');
var_dump(method_exists($directory,'read'));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
bool(true)
]]>
</screen>
</example>
<example>
<title>Static <function>method_exists</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
var_dump(method_exists('Directory','read'));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
bool(true)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
¬e.uses-autoload;
<note>
<simpara>
The <function>method_exists</function> function cannot detect methods
that are magically accessible using the
<link linkend="language.oop5.overloading.methods"><literal>__call</literal></link>
magic method.
</simpara>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>function_exists</function></member>
<member><function>is_callable</function></member>
<member><function>class_exists</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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