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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 326063 $ -->
<refentry xml:id="function.get-class" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>get_class</refname>
<refpurpose>Returns the name of the class of an object</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>get_class</methodname>
<methodparam choice="opt"><type>object</type><parameter>object</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
Gets the name of the class of the given <parameter>object</parameter>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>object</parameter></term>
<listitem>
<para>
The tested object. This parameter may be omitted when inside a class.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the name of the class of which <parameter>object</parameter> is an
instance. Returns &false; if <parameter>object</parameter> is not an
object.
</para>
<para>
If <parameter>object</parameter> is omitted when inside a class, the
name of that class is returned.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
If <function>get_class</function> is called with anything other than an
object, an <constant>E_WARNING</constant> level error is raised.
</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>5.3.0</entry>
<entry>
&null; became the default value for <parameter>object</parameter>,
so passing &null; to <parameter>object</parameter> now has the same
result as not passing any value.
</entry>
</row>
<row>
<entry>5.0.0</entry>
<entry>
The class name is returned in its original notation.
</entry>
</row>
<row>
<entry>5.0.0</entry>
<entry>
The <parameter>object</parameter> parameter is optional if called
from the object's method.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Using <function>get_class</function></title>
<programlisting role="php">
<![CDATA[
<?php
class foo {
function name()
{
echo "My name is " , get_class($this) , "\n";
}
}
// create an object
$bar = new foo();
// external call
echo "Its name is " , get_class($bar) , "\n";
// internal call
$bar->name();
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Its name is foo
My name is foo
]]>
</screen>
</example>
<example>
<title>Using <function>get_class</function> in superclass</title>
<programlisting role="php">
<![CDATA[
<?php
abstract class bar {
public function __construct()
{
var_dump(get_class($this));
var_dump(get_class());
}
}
class foo extends bar {
}
new foo;
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
string(3) "foo"
string(3) "bar"
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>get_called_class</function></member>
<member><function>get_parent_class</function></member>
<member><function>gettype</function></member>
<member><function>is_subclass_of</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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