php-doc-en/reference/classobj/functions/method-exists.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<refentry id="function.method-exists">
 <refnamediv>
  <refname>method_exists</refname>
  <refpurpose>Checks if the class method exists</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <methodsynopsis>
   <type>bool</type><methodname>method_exists</methodname>
   <methodparam><type>object</type><parameter>object</parameter></methodparam>
   <methodparam><type>string</type><parameter>method_name</parameter></methodparam>
  </methodsynopsis>
  <para>
   This function returns &true; if the method given by
   <parameter>method_name</parameter> has been defined for the given
   <parameter>object</parameter>, &false; otherwise.
  </para>
  <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>
  </para>
  <para>
   See also <function>function_exists</function> and
   <function>is_callable</function>.
  </para>
 </refsect1>
</refentry>

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