diff --git a/language/predefined/attributes.xml b/language/predefined/attributes.xml
index 30d757915ecb..3ae9cd9b7afd 100644
--- a/language/predefined/attributes.xml
+++ b/language/predefined/attributes.xml
@@ -10,6 +10,7 @@
 
  &language.predefined.attributes.attribute;
  &language.predefined.attributes.allowdynamicproperties;
+ &language.predefined.attributes.deprecated;
  &language.predefined.attributes.override;
  &language.predefined.attributes.returntypewillchange;
  &language.predefined.attributes.sensitiveparameter;
diff --git a/language/predefined/attributes/deprecated.xml b/language/predefined/attributes/deprecated.xml
new file mode 100644
index 000000000000..98763d59adc1
--- /dev/null
+++ b/language/predefined/attributes/deprecated.xml
@@ -0,0 +1,138 @@
+<?xml version="1.0" encoding="utf-8"?>
+<reference xml:id="class.deprecated" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
+ <title>The Deprecated attribute</title>
+ <titleabbrev>Deprecated</titleabbrev>
+
+ <partintro>
+
+  <section xml:id="deprecated.intro">
+   &reftitle.intro;
+   <simpara>
+    This attribute is used to mark functionality as deprecated.
+    Using deprecated functionality will cause an <constant>E_USER_DEPRECATED</constant> error to be emitted.
+   </simpara>
+  </section>
+
+  <section xml:id="deprecated.synopsis">
+   &reftitle.classsynopsis;
+
+   <classsynopsis class="class">
+    <ooclass>
+     <modifier>final</modifier>
+     <classname>Deprecated</classname>
+    </ooclass>
+
+    <classsynopsisinfo role="comment">&Properties;</classsynopsisinfo>
+    <fieldsynopsis>
+     <modifier>public</modifier>
+     <modifier>readonly</modifier>
+     <type class="union"><type>string</type><type>null</type></type>
+     <varname linkend="deprecated.props.message">message</varname>
+    </fieldsynopsis>
+    <fieldsynopsis>
+     <modifier>public</modifier>
+     <modifier>readonly</modifier>
+     <type class="union"><type>string</type><type>null</type></type>
+     <varname linkend="deprecated.props.since">since</varname>
+    </fieldsynopsis>
+
+    <classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
+    <xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.deprecated')/db:refentry/db:refsect1[@role='description']/descendant::db:constructorsynopsis[@role='Deprecated'])">
+     <xi:fallback/>
+    </xi:include>
+   </classsynopsis>
+  </section>
+
+  <section xml:id="deprecated.props">
+   &reftitle.properties;
+   <variablelist>
+    <varlistentry xml:id="deprecated.props.message">
+     <term><varname>message</varname></term>
+     <listitem>
+      <para>
+       An optional message explaining the reason for the deprecation and possible replacement functionality.
+       Will be included in the emitted deprecation message.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry xml:id="deprecated.props.since">
+     <term><varname>since</varname></term>
+     <listitem>
+       <para>
+        An optional string indicating since when the functionality is deprecated.
+        The contents are not validated by PHP and may contain a version number,
+        a date or any other value that is considered appropriate.
+        Will be included in the emitted deprecation message.
+       </para>
+       <para>
+        Functionality that is part of PHP will use Major.Minor as the <varname>since</varname> value,
+        for example <literal>'8.4'</literal>.
+       </para>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </section>
+
+  <section>
+   &reftitle.examples;
+   <informalexample>
+    <programlisting role="php">
+<![CDATA[
+<?php
+
+#[\Deprecated(message: "use safe_replacement() instead", since: "1.5")]
+function unsafe_function()
+{
+   echo "This is unsafe", PHP_EOL;
+}
+
+unsafe_function();
+
+?>
+]]>
+    </programlisting>
+    &example.outputs.84.similar;
+    <screen>
+<![CDATA[
+Deprecated: Function unsafe_function() is deprecated since 1.5, use safe_replacement() instead in example.php on line 9
+This is unsafe
+]]>
+    </screen>
+   </informalexample>
+  </section>
+
+  <section xml:id="deprecated.seealso">
+   &reftitle.seealso;
+   <simplelist>
+    <member><link linkend="language.attributes">Attributes overview</link></member>
+    <member><methodname>ReflectionFunctionAbstract::isDeprecated</methodname></member>
+    <member><methodname>ReflectionClassConstant::isDeprecated</methodname></member>
+    <member><constant>E_USER_DEPRECATED</constant></member>
+   </simplelist>
+  </section>
+
+ </partintro>
+
+ &language.predefined.attributes.deprecated.construct;
+
+</reference>
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"~/.phpdoc/manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/language/predefined/attributes/deprecated/construct.xml b/language/predefined/attributes/deprecated/construct.xml
new file mode 100644
index 000000000000..0ac0114a2b23
--- /dev/null
+++ b/language/predefined/attributes/deprecated/construct.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<refentry xml:id="deprecated.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <refnamediv>
+  <refname>Deprecated::__construct</refname>
+  <refpurpose>Construct a new Deprecated attribute instance</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <constructorsynopsis role="Deprecated">
+   <modifier>public</modifier> <methodname>Deprecated::__construct</methodname>
+   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>message</parameter><initializer>&null;</initializer></methodparam>
+   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>since</parameter><initializer>&null;</initializer></methodparam>
+  </constructorsynopsis>
+  <simpara>
+   Constructs a new <classname>Deprecated</classname> instance.
+  </simpara>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <variablelist>
+   <varlistentry>
+    <term><parameter>message</parameter></term>
+    <listitem>
+     <para>
+      The value of the <property linkend="deprecated.props.message">message</property> property.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term><parameter>since</parameter></term>
+    <listitem>
+     <para>
+      The value of the <property linkend="deprecated.props.since">since</property> property.
+     </para>
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </refsect1>
+</refentry>
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"~/.phpdoc/manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/language/predefined/versions.xml b/language/predefined/versions.xml
index 03c95b49b1ba..d79b0320fb76 100644
--- a/language/predefined/versions.xml
+++ b/language/predefined/versions.xml
@@ -177,6 +177,8 @@
  <function name="SensitiveParameterValue::getValue" from="PHP 8 &gt;= 8.2.0"/>
  <function name="Override" from="PHP 8 &gt;= 8.3.0"/>
  <function name="Override::__construct" from="PHP 8 &gt;= 8.3.0"/>
+ <function name="Deprecated" from="PHP 8 &gt;= 8.4.0"/>
+ <function name="Deprecated::__construct" from="PHP 8 &gt;= 8.4.0"/>
  <function name="__PHP_Incomplete_Class" from="PHP 4 &gt;=4.0.1, PHP 5, PHP 7, PHP 8"/>
 </versions>
 <!-- Keep this comment at the end of the file
diff --git a/reference/reflection/reflectionfunctionabstract/isdeprecated.xml b/reference/reflection/reflectionfunctionabstract/isdeprecated.xml
index 5d87b32bc7cd..7ad3c14149d1 100644
--- a/reference/reflection/reflectionfunctionabstract/isdeprecated.xml
+++ b/reference/reflection/reflectionfunctionabstract/isdeprecated.xml
@@ -59,6 +59,7 @@ bool(true)
   &reftitle.seealso;
   <para>
    <simplelist>
+    <member><classname>Deprecated</classname></member>
     <member><methodname>ReflectionFunctionAbstract::getDocComment</methodname></member>
    </simplelist>
   </para>