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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.3 $ -->
<refentry xml:id="domdocument.registernodeclass" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>DOMDocument::registerNodeClass</refname>
<refpurpose>Register extended class used to create base node type</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>DOMDocument::registerNodeClass</methodname>
<methodparam><type>string</type><parameter>baseclass</parameter></methodparam>
<methodparam><type>string</type><parameter>extendedclass</parameter></methodparam>
</methodsynopsis>
<para>
This method allows you to register your own extended DOM class to be used
afterward by the PHP DOM extension.
</para>
<para>
This method is not part of the DOM standard.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>baseclass</parameter></term>
<listitem>
<para>
The DOM class that you want to extend. You can find a list of these
classes in the chapter introduction.
</para>
<para>
Of course, you won't be able to register a class extending DOMDocument
but you can always start your document by instanciating your own
extending class.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>extendedclass</parameter></term>
<listitem>
<para>
Your extended class name. If &null; is provided, any previously
registered class extending <parameter>baseclass</parameter> will
be removed.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>PHP 5.2.2</entry>
<entry>
Prior to 5.2.2, a previously registered <parameter>extendedclass</parameter>
had to be unregistered before being able to register a new class extending
the same <parameter>baseclass</parameter>.
</entry>
</row>
<!--
<row>
<entry>...</entry>
<entry>
...
</entry>
</row>
-->
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Adding a new method to DOMElement to ease our code</title>
<programlisting role="php">
<![CDATA[
<?php
class myElement extends DOMElement {
function appendElement($name) {
return $this->appendChild(new myElement($name));
}
}
class myDocument extends DOMDocument {
function setRoot($name) {
return $this->appendChild(new myElement($name));
}
}
$doc = new myDocument();
$doc->registerNodeClass('DOMElement', 'myElement');
// From now on, adding an element to another costs only one method call !
$root = $doc->setRoot('root');
$child = $root->appendElement('child');
$child->setAttribute('foo', 'bar');
echo $doc->saveXML();
?>
]]>
</programlisting>
&example.outputs;
<screen role="xml">
<![CDATA[
<?xml version="1.0"?>
<root><child foo="bar"/></root>
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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