Joomla!-开源天空

例子二：
这个例子中，插件将调用模块，展示在文章最终页面中。个人觉得这个例子更有参考价值！

<?php
/**
* @version  $Id: loadmodule.php 9764 2007-12-30 07:48:11Z ircmaxell $
* @package  Joomla
* @copyright Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved.
* @license  GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
//You can not directly access the file when you put this code at the beginning:
// no direct access
defined( '_JEXEC' ) or die( 'Restricted access' );
 
//下面的程序在系统中注册了插件，检查正文中的内容,在合适的地方，将调用plgContentLoadModule函数调用
$mainframe->registerEvent( 'onPrepareContent', 'plgContentLoadModule' );
 
//函数代码
function plgContentLoadModule( &$row, &$params, $page=0 )
{
//访问数据库
 $db =& JFactory::getDBO();
//检查是否应该执行这个插件的功能
 if ( JString::strpos( $row->text, 'loadposition' ) === false ) {
  return true;
 }
 
//获取插件信息
 $plugin =& JPluginHelper::getPlugin('content', 'loadmodule');
 
//查找正文中的的标签
  $regex = '//i';
 
//获取参数
  $pluginParams = new JParameter( $plugin->params );
 
//检查插件是否已经发布
 if ( !$pluginParams->get( 'enabled', 1 ) ) {
  $row->text = preg_replace( $regex, '', $row->text );
  return true;
 }
 
//查找所有正文中匹配的地方
 preg_match_all( $regex, $row->text, $matches );
 
//匹配的总数
  $count = count( $matches[0] );
 
//如果有匹配，那么就执行插件
  if ( $count ) {
//取得参数
   $style = $pluginParams->def( 'style', -2 );
 
   plgContentProcessPositions( $row, $matches, $count, $regex, $style );
 }
}

//正文内容匹配位置处理函数
function plgContentProcessPositions ( &$row, &$matches, $count, $regex, $style )
{
  for ( $i=0; $i < $count; $i++ )
 {
 
//处理匹配部分内容，去掉
   $load = str_replace( 'loadposition', '', $matches[0][$i] );
   $load = str_replace( '{', '', $load );
   $load = str_replace( '}', '', $load );
   $load = trim( $load );
 
//在匹配位置调用plgContentLoadPosition
  $modules = plgContentLoadPosition( $load, $style );
  $row->text  = preg_replace( '{'. $matches[0][$i] .'}', $modules, $row->text );
  }
 
//去除无关标记
 $row->text = preg_replace( $regex, '', $row->text );
}
 
//调用模块的函数
function plgContentLoadPosition( $position, $style=-2 )
{
 
//获取document实例
 $document = &JFactory::getDocument();
 
//加载模块
 $renderer = $document->loadRenderer('module');
 
//加载参数
 $params  = array('style'=>$style);
 
 $contents = '';
 
 foreach (JModuleHelper::getModules($position) as $mod)  {
  $contents .= $renderer->render($mod, $params);
 }
 
//返回模块内容
 return $contents;
}