diff --git a/appendices/migration52.xml b/appendices/migration52.xml
index 0554103bed..c0d27879f4 100644
--- a/appendices/migration52.xml
+++ b/appendices/migration52.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
 <appendix id="migration52">
  <title>Migrating from PHP 5.1.x to PHP 5.2.x</title>
 
@@ -536,6 +536,18 @@ $obj->getCommentName('');
 
   <para>PHP Core:</para>
   <itemizedlist>
+   <listitem>
+    <simpara>
+     <function>htmlentities</function>
+     - added <parameter>double_encode</parameter> in PHP 5.2.3.
+    </simpara>
+   </listitem>
+   <listitem>
+    <simpara>
+     <function>htmlspecialchars</function>
+     - added <parameter>double_encode</parameter> in PHP 5.2.3.
+    </simpara>
+   </listitem>
    <listitem>
     <simpara>
      <function>base64_decode</function>
diff --git a/reference/strings/functions/htmlentities.xml b/reference/strings/functions/htmlentities.xml
index 78d13598a9..0afdcfe767 100644
--- a/reference/strings/functions/htmlentities.xml
+++ b/reference/strings/functions/htmlentities.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.10 $ -->
+<!-- $Revision: 1.11 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
   <refentry id="function.htmlentities">
    <refnamediv>
@@ -15,6 +15,7 @@
       <methodparam><type>string</type><parameter>string</parameter></methodparam>
       <methodparam choice="opt"><type>int</type><parameter>quote_style</parameter></methodparam>
       <methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
+      <methodparam choice="opt"><type>bool</type><parameter>double_encode</parameter></methodparam>
      </methodsynopsis>
     <para>
      This function is identical to
@@ -53,17 +54,21 @@
       </tgroup>
      </table>
     </para>
-    <para>
-     Support for the optional <parameter>quote</parameter> parameter was
-     added in PHP 4.0.3.
-    </para>
     <para>
      Like <function>htmlspecialchars</function>, it takes an optional
      third argument <parameter>charset</parameter> which defines character
-     set used in conversion. Support for this argument was added in PHP 4.1.0.
+     set used in conversion.
      Presently, the ISO-8859-1 character set is used as the default.
     </para>
     &reference.strings.charsets;
+    <para>
+     When <parameter>double_encode</parameter> is turned off PHP will not
+     encode existing html entities. The default is to convert everything.
+    </para>
+    <para>The <parameter>double_quote</parameter> parameter was added in PHP 5.2.3,
+     <parameter>charset</parameter> in 4.1.0 and
+     <parameter>quote</parameter> in PHP 4.0.3.
+    </para>
     <para>
      If you're wanting to decode instead (the reverse) you can use
      <function>html_entity_decode</function>.
diff --git a/reference/strings/functions/htmlspecialchars.xml b/reference/strings/functions/htmlspecialchars.xml
index 5b909ee795..b701495e42 100644
--- a/reference/strings/functions/htmlspecialchars.xml
+++ b/reference/strings/functions/htmlspecialchars.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.8 $ -->
+<!-- $Revision: 1.9 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
   <refentry id="function.htmlspecialchars">
    <refnamediv>
@@ -15,6 +15,7 @@
       <methodparam><type>string</type><parameter>string</parameter></methodparam>
       <methodparam choice="opt"><type>int</type><parameter>quote_style</parameter></methodparam>
       <methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
+      <methodparam choice="opt"><type>bool</type><parameter>double_encode</parameter></methodparam>
      </methodsynopsis>
     <para>
      Certain characters have special significance in HTML, and should
@@ -91,6 +92,11 @@ echo $new; // &lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;
      this third argument was added in PHP 4.1.0.
     </para>
     &reference.strings.charsets;
+    <para>
+     When <parameter>double_encode</parameter> is turned off PHP will not
+     encode existing html entities, the default is to convert everything.
+     This parameter was added in PHP 5.2.3.
+    </para>
     <para>
      See also <function>get_html_translation_table</function>,
      <function>htmlspecialchars_decode</function>,