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<?xml version="1.0" encoding="utf-8"?>
<refentry xml:id="reflectionenum.getbackingtype" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>ReflectionEnum::getBackingType</refname>
<refpurpose>Gets the backing type of an Enum, if any</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="ReflectionEnum">
<modifier>public</modifier> <type class="union"><type>ReflectionNamedType</type><type>null</type></type><methodname>ReflectionEnum::getBackingType</methodname>
<void/>
</methodsynopsis>
<para>
If the enumeration is a Backed Enum, this method will return an instance
of <classname>ReflectionType</classname> for the backing type of the Enum.
If it is not a Backed Enum, it will return <literal>null</literal>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
&no.function.parameters;
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
An instance of <classname>ReflectionNamedType</classname>, or <literal>null</literal>
if the Enum has no backing type.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.2.0</entry>
<entry>
The return type is now declared as <literal>?ReflectionNamedType</literal>. Previously,
<literal>?ReflectionType</literal> was declared.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><methodname>ReflectionEnum::getBackingType</methodname> example</title>
<programlisting role="php">
<![CDATA[
<?php
enum Suit: string
{
case Hearts = 'H';
case Diamonds = 'D';
case Clubs = 'C';
case Spades = 'S';
}
$rEnum = new ReflectionEnum(Suit::class);
$rBackingType = $rEnum->getBackingType();
var_dump((string) $rBackingType);
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
string(6) "string"
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><link linkend="language.enumerations">Enumerations</link></member>
<member><methodname>ReflectionEnum::isBacked</methodname></member>
</simplelist>
</para>
</refsect1>
</refentry>
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