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<?xml version="1.0" encoding="UTF-8"?>
<!-- Reviewed: no -->
<sect1 id="zend.feed.custom-feed">
<title>Custom Feed and Entry Classes</title>
<para>
Finally, you can extend the <classname>Zend_Feed</classname> classes if you'd like to
provide your own format or niceties like automatic handling of elements that should go into
a custom namespace.
</para>
<para>
Here is an example of a custom Atom entry class that handles its own
<emphasis>myns:</emphasis> namespace entries. Note that it also makes the
<methodname>registerNamespace()</methodname> call for you, so the end user doesn't need to
worry about namespaces at all.
</para>
<example id="zend.feed.custom-feed.example.extending">
<title>Extending the Atom Entry Class with Custom Namespaces</title>
<programlisting language="php"><![CDATA[
/**
* The custom entry class automatically knows the feed URI (optional) and
* can automatically add extra namespaces.
*/
class MyEntry extends Zend_Feed_Entry_Atom
{
public function __construct($uri = 'http://www.example.com/myfeed/',
$xml = null)
{
parent::__construct($uri, $xml);
Zend_Feed::registerNamespace('myns',
'http://www.example.com/myns/1.0');
}
public function __get($var)
{
switch ($var) {
case 'myUpdated':
// Translate myUpdated to myns:updated.
return parent::__get('myns:updated');
default:
return parent::__get($var);
}
}
public function __set($var, $value)
{
switch ($var) {
case 'myUpdated':
// Translate myUpdated to myns:updated.
parent::__set('myns:updated', $value);
break;
default:
parent::__set($var, $value);
}
}
public function __call($var, $unused)
{
switch ($var) {
case 'myUpdated':
// Translate myUpdated to myns:updated.
return parent::__call('myns:updated', $unused);
default:
return parent::__call($var, $unused);
}
}
}
]]></programlisting>
<para>
Then to use this class, you'd just instantiate it directly and set the
<property>myUpdated</property> property:
</para>
<programlisting language="php"><![CDATA[
$entry = new MyEntry();
$entry->myUpdated = '2005-04-19T15:30';
// method-style call is handled by __call function
$entry->myUpdated();
// property-style call is handled by __get function
$entry->myUpdated;
]]></programlisting>
</example>
</sect1>
<!--
vim:se ts=4 sw=4 et:
-->
|
