diff --git a/reference/info/functions/get-defined-constants.xml b/reference/info/functions/get-defined-constants.xml
index 22a1421c7b..03dc593710 100644
--- a/reference/info/functions/get-defined-constants.xml
+++ b/reference/info/functions/get-defined-constants.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.7 $ -->
+<!-- $Revision: 1.8 $ -->
 <!-- splitted from ./en/functions/info.xml, last change in rev 1.71 -->
   <refentry id="function.get-defined-constants">
    <refnamediv>
@@ -13,7 +13,7 @@
     <title>Description</title>
      <methodsynopsis>
       <type>array</type><methodname>get_defined_constants</methodname>
-      <void/>
+      <methodparam choice="opt"><type>mixed</type><parameter>categorize</parameter></methodparam>
      </methodsynopsis>
     <para>
      This function returns the names and values of all the constants
@@ -56,6 +56,69 @@ Array
       </screen>
      </informalexample>
     </para>
+    <para>
+     As of PHP 5, you can pass an optional parameter
+     <parameter>categorize</parameter> causing that this function will return
+     multi-dimensional array with categories in keys of the first dimension and
+     constants and their values in the second dimension.
+     <informalexample>
+      <programlisting role="php">
+<![CDATA[
+<?php
+define("MY_CONSTANT", 1);
+print_r(get_defined_constants(true));
+?>
+]]>
+      </programlisting>
+      &example.outputs.similar;
+      <screen>
+<![CDATA[
+Array
+(
+    [internal] => Array
+        (
+            [E_ERROR] => 1
+            [E_WARNING] => 2
+            [E_PARSE] => 4
+            [E_NOTICE] => 8
+            [E_CORE_ERROR] => 16
+            [E_CORE_WARNING] => 32
+            [E_COMPILE_ERROR] => 64
+            [E_COMPILE_WARNING] => 128
+            [E_USER_ERROR] => 256
+            [E_USER_WARNING] => 512
+            [E_USER_NOTICE] => 1024
+            [E_ALL] => 2047
+            [TRUE] => 1
+        )
+
+    [pcre] => Array
+        (
+            [PREG_PATTERN_ORDER] => 1
+            [PREG_SET_ORDER] => 2
+            [PREG_OFFSET_CAPTURE] => 256
+            [PREG_SPLIT_NO_EMPTY] => 1
+            [PREG_SPLIT_DELIM_CAPTURE] => 2
+            [PREG_SPLIT_OFFSET_CAPTURE] => 4
+            [PREG_GREP_INVERT] => 1
+        )
+
+    [user] => Array
+        (
+            [MY_CONSTANT] => 1
+        )
+
+)
+]]>
+      </screen>
+     </informalexample>
+     <note>
+      <para>
+       Value of the <parameter>categorize</parameter> parameter is irrelevant,
+       only presence is considered.
+      </para>
+     </note>
+    </para>
     <para>
      See also 
      <function>defined</function>,