diff --git a/reference/dom/domxpath/registerphpfunctions.xml b/reference/dom/domxpath/registerphpfunctions.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision: $ -->
+
+<refentry xml:id="domxpath.registerphpfunctions" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <refnamediv>
+  <refname>DOMXPath::registerPhpFunctions</refname>
+  <refpurpose>Register PHP functions as XPath functions</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <methodsynopsis>
+   <modifier>public</modifier> <type>void</type><methodname>DOMXPath::registerPhpFunctions</methodname>
+   <methodparam choice="opt"><type>mixed</type><parameter>restrict</parameter></methodparam>
+  </methodsynopsis>
+  <para>
+   This method enables the ability to use PHP functions within XPath expressions.
+  </para>
+
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <para>
+   <variablelist>
+    <varlistentry>
+     <term><parameter>restrict</parameter></term>
+     <listitem>
+      <para>
+       Use this parameter to only allow certain functions to be called from XPath.
+      </para>
+      <para>
+       This parameter can be either a <type>string</type> (a function name) or 
+       an <type>array</type> of function names.
+      </para>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </para>
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <para>
+   &return.void;
+  </para>
+ </refsect1>
+
+ <refsect1 role="examples">
+  &reftitle.examples;
+  <para>
+   The following examples use <filename>book.xml</filename> which contains the following:
+  </para>
+  <para>
+   <example>
+    <title>book.xml</title>
+    <programlisting role="xml">
+<![CDATA[
+<?xml version="1.0" encoding="UTF-8"?>
+<books>
+ <book>
+  <title>PHP Basics</title>
+  <author>Jim Smith</author>
+  <author>Jane Smith</author>
+ </book>
+ <book>
+  <title>PHP Secrets</title>
+  <author>Jenny Smythe</author>
+ </book>
+ <book>
+  <title>XML basics</title>
+  <author>Joe Black</author>
+ </book>
+</books>
+]]>
+    </programlisting>
+   </example>
+  </para>
+  <para>
+   <example>
+    <title><methodname>DOMXPath::registerPHPFunctions</methodname> with <literal>php:functionString</literal></title>
+    <programlisting role="php">
+<![CDATA[
+<?php
+$doc = new DOMDocument;
+$doc->load('book.xml');
+
+$xpath = new DOMXPath($doc);
+
+// Register the php: namespace (required)
+$xpath->registerNamespace("php", "http://php.net/xpath");
+
+// Register PHP functions (no restrictions)
+$xpath->registerPHPFunctions();
+
+// Call substr function on the book title
+$nodes = $xpath->query('//book[php:functionString("substr", title, 0, 3) = "PHP"]');
+
+echo "Found {$nodes->length} books starting with 'PHP':\n";
+foreach ($nodes as $node) {
+    $title  = $node->getElementsByTagName("title")->item(0)->nodeValue;
+    $author = $node->getElementsByTagName("author")->item(0)->nodeValue;
+    echo "$title by $author\n";
+}
+
+?>
+]]>
+    </programlisting>
+    &example.outputs.similar;
+    <screen>
+<![CDATA[
+Found 2 books starting with 'PHP':
+PHP Basics by Jim Smith
+PHP Secrets by Jenny Smythe
+]]>
+    </screen>
+   </example>
+  </para>
+  <para>
+   <example>
+    <title><methodname>DOMXPath::registerPHPFunctions</methodname> with <literal>php:function</literal></title>
+    <programlisting role="php">
+<![CDATA[
+<?php
+$doc = new DOMDocument;
+$doc->load('book.xml');
+
+$xpath = new DOMXPath($doc);
+
+// Register the php: namespace (required)
+$xpath->registerNamespace("php", "http://php.net/xpath");
+
+// Register PHP functions (has_multiple only)
+$xpath->registerPHPFunctions("has_multiple");
+ 
+function has_multiple($nodes) {
+    // Return true if more than one author
+    return count($nodes) > 1;
+}
+// Filter books with multiple authors
+$books = $xpath->query('//book[php:function("has_multiple", author)]');
+
+echo "Books with multiple authors:\n";
+foreach ($books as $book) {
+    echo $book->getElementsByTagName("title")->item(0)->nodeValue . "\n";
+}
+
+?>
+]]>
+    </programlisting>
+    &example.outputs.similar;
+    <screen>
+<![CDATA[
+Books with multiple authors:
+PHP Basics
+]]>
+    </screen>
+   </example>
+  </para>
+ </refsect1>
+ 
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <para>
+   <simplelist>
+    <member><methodname>DOMXPath::registerNamespace</methodname></member>
+    <member><methodname>DOMXPath::query</methodname></member>
+    <member><methodname>DOMXPath::evaluate</methodname></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:"../../../../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
+-->