diff --git a/reference/pgsql/functions/pg-free-result.xml b/reference/pgsql/functions/pg-free-result.xml
index 3e91573bf8c1..4f6491b1a840 100644
--- a/reference/pgsql/functions/pg-free-result.xml
+++ b/reference/pgsql/functions/pg-free-result.xml
@@ -104,6 +104,7 @@ First field in the second row is: 2
     <member><function>pg_query</function></member>
     <member><function>pg_query_params</function></member>
     <member><function>pg_execute</function></member>
+    <member><function>pg_result_memory_size</function></member>
    </simplelist>
   </para>
  </refsect1>
diff --git a/reference/pgsql/functions/pg-result-memory-size.xml b/reference/pgsql/functions/pg-result-memory-size.xml
new file mode 100644
index 000000000000..da73d32f8fcf
--- /dev/null
+++ b/reference/pgsql/functions/pg-result-memory-size.xml
@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision$ -->
+<refentry xml:id="function.pg-result-memory-size" xmlns="http://docbook.org/ns/docbook">
+ <refnamediv>
+  <refname>pg_result_memory_size</refname>
+  <refpurpose>Returns the amount of memory allocated for a query result</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <methodsynopsis>
+   <type>int</type><methodname>pg_result_memory_size</methodname>
+   <methodparam><type>PgSql\Result</type><parameter>result</parameter></methodparam>
+  </methodsynopsis>
+  <simpara>
+   Returns the amount of memory, in bytes, allocated to the specified query result
+   <classname>PgSql\Result</classname> instance.
+   This value is the same amount that would be freed by <function>pg_free_result</function>.
+  </simpara>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <para>
+   <variablelist>
+    <varlistentry>
+     <term><parameter>result</parameter></term>
+     <listitem>
+      &pgsql.parameter.result;
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </para>
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <simpara>
+   Returns the memory amount in bytes.
+  </simpara>
+ </refsect1>
+
+ <refsect1 role="examples">
+  &reftitle.examples;
+  <example>
+   <title><function>pg_result_memory_size</function> example</title>
+   <programlisting role="php">
+<![CDATA[
+<?php
+$db = pg_connect("dbname=users user=me");
+
+$res = pg_query($db, 'SELECT 1');
+
+$size = pg_result_memory_size($res);
+
+var_dump($size);
+?>
+]]>
+   </programlisting>
+   &example.outputs.similar;
+   <screen>
+<![CDATA[
+int(3288)
+]]>
+   </screen>
+  </example>
+ </refsect1>
+
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <para>
+   <simplelist>
+    <member><function>pg_free_result</function></member>
+   </simplelist>
+  </para>
+ </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/reference/pgsql/versions.xml b/reference/pgsql/versions.xml
index 04d00b7d6abb..2232618fabee 100644
--- a/reference/pgsql/versions.xml
+++ b/reference/pgsql/versions.xml
@@ -77,6 +77,7 @@
  <function name="pg_query_params" from="PHP 5 &gt;= 5.1.0, PHP 7, PHP 8"/>
  <function name="pg_result_error" from="PHP 4 &gt;= 4.2.0, PHP 5, PHP 7, PHP 8"/>
  <function name="pg_result_error_field" from="PHP 5 &gt;= 5.1.0, PHP 7, PHP 8"/>
+ <function name="pg_result_memory_size" from="PHP 8 &gt;= 8.4.0"/>
  <function name="pg_result_seek" from="PHP 4 &gt;= 4.3.0, PHP 5, PHP 7, PHP 8"/>
  <function name="pg_result_status" from="PHP 4 &gt;= 4.2.0, PHP 5, PHP 7, PHP 8"/>
  <function name="pg_select" from="PHP 4 &gt;= 4.3.0, PHP 5, PHP 7, PHP 8"/>