diff --git a/language/oop5/anonymous.xml b/language/oop5/anonymous.xml
index 08b2f7acfad7..4430503a5f49 100644
--- a/language/oop5/anonymous.xml
+++ b/language/oop5/anonymous.xml
@@ -173,6 +173,34 @@ class@anonymous/in/oNi1A0x7f8636ad2021
    </screen>
   </informalexample>
  </note>
+
+ <sect2 xml:id="language.oop5.anonymous.readonly">
+  <title>Readonly anonymous classes</title>
+  <simpara>
+   As of PHP 8.3.0, the <literal>readonly</literal> modifier can
+   be applied to anonymous classes.
+  </simpara>
+  <example xml:id="language.oop5.anonymous.readonly.example">
+   <title>Defining a readonly anonymous class</title>
+   <programlisting role="php">
+    <![CDATA[
+<?php
+
+// Using an anonymous class
+$util->setLogger(new readonly class('[DEBUG]') {
+    public function __construct(private string $prefix)
+    {
+    }
+
+    public function log($msg)
+    {
+        echo $this->prefix . ' ' . $msg;
+    }
+});
+]]>
+   </programlisting>
+  </example>
+ </sect2>
 </sect1>
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