Продолжаем разработку компонента для Joomla! 1.6 (Часть 4)

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
 
// import Joomla modelitem library
jimport('joomla.application.component.modelitem');
 
/**
 * HelloWorld Model
 */
class HelloWorldModelHelloWorld extends JModelItem
{
 /**
 * @var string msg
 */
 protected $msg;
 
 /**
 * Get the message
 * @return string The message to be displayed to the user
 */
 public function getMsg() 
 {
 if (!isset($this->msg)) 
 {
 $this->msg = 'Hello World!';
 }
 return $this->msg;
 }
}

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
 
// import Joomla view library
jimport('joomla.application.component.view');
 
/**
 * HTML View class for the HelloWorld Component
 */
class HelloWorldViewHelloWorld extends JView
{
 // Overwriting JView display method
 function display($tpl = null) 
 {
 // Assign data to the view
 $this->msg = $this->get('Msg');
 
 // Check for errors.
 if (count($errors = $this->get('Errors'))) 
 {
 JError::raiseError(500, implode('<br />', $errors));
 return false;
 }
 // Display the view
 parent::display($tpl);
 }
}

<?xml version="1.0" encoding="utf-8"?>
<extension type="component" version="1.6.0" method="upgrade">
 
 <name>Hello World!</name>
 <!-- The following elements are optional and free of formatting conttraints -->
 <creationDate>November 2009</creationDate>
 <author>John Doe</author>
 <authorUrl>http://www.example.org</authorUrl>
 <copyright>Copyright Info</copyright>
 <license>License Info</license>
 <!--  The version string is recorded in the components table -->
 <version>0.0.4</version>
 <!-- The description is optional and defaults to the name -->
 <description>Description of the Hello World component ...</description>
 
 <update> <!-- Runs on update; New in 1.6 -->
 <schemas>
 <schemapath type="mysql">sql/updates/mysql</schemapath>
 </schemas>
 </update>
 
 <!-- Site Main File Copy Section -->
 <!-- Note the folder attribute: This attribute describes the folder
 to copy FROM in the package to install therefore files copied
 in this section are copied from /site/ in the package -->
 <files folder="site">
 <filename>index.html</filename>
 <filename>helloworld.php</filename>
 <filename>controller.php</filename>
 <folder>views</folder>
 <folder>models</folder>
 </files>
 
 <administration>
 <!-- Administration Menu Section -->
 <menu>Hello World!</menu>
 <!-- Administration Main File Copy Section -->
 <!-- Note the folder attribute: This attribute describes the folder
 to copy FROM in the package to install therefore files copied
 in this section are copied from /admin/ in the package -->
 <files folder="admin">
 <!-- Admin Main File Copy Section -->
 <filename>index.html</filename>
 <filename>helloworld.php</filename>
 <!-- SQL files section -->
 <folder>sql</folder>
 </files>
 </administration>
 
</extension>