language/oop5/anonymous.xml
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d6f54016d62904cfd8200604aadd5e3f0d9bad97
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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<sect1 xml:id="language.oop5.anonymous" xmlns="http://docbook.org/ns/docbook">
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<title>Anonymous classes</title>
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<para>
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Support for anonymous classes was added in PHP 7. Anonymous classes are
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useful when simple, one-off objects need to be created.
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Anonymous classes are useful when simple, one-off objects need to be created.
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</para>
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<informalexample>
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<![CDATA[
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<?php
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// Pre PHP 7 code
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// Using an explicit class
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class Logger
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{
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public function log($msg)
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$util->setLogger(new Logger());
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// PHP 7+ code
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// Using an anonymous class
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$util->setLogger(new class {
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public function log($msg)
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{
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</screen>
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</informalexample>
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</note>
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</sect1>
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<sect2 xml:id="language.oop5.anonymous.readonly">
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<title>Readonly anonymous classes</title>
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<simpara>
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As of PHP 8.3.0, the <literal>readonly</literal> modifier can
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be applied to anonymous classes.
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</simpara>
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<example xml:id="language.oop5.anonymous.readonly.example">
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<title>Defining a readonly anonymous class</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// Using an anonymous class
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var_dump(new readonly class('[DEBUG]') {
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public function __construct(private string $prefix)
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{
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}
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public function log($msg)
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{
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echo $this->prefix . ' ' . $msg;
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}
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});
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]]>
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</programlisting>
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</example>
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</sect2>
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</sect1>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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