J1.5:Creating a content plugin

<?php
 
//First start with some information about the Content Plugin, its author and probably some other information
/**
* @version              $Id: vote.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' );
 
//Now set the registerEvent. The action will start before the content is opened.
//In plgContentVote you should replace Vote by the name of your own Plugin.
$mainframe->registerEvent( 'onBeforeDisplayContent', 'plgContentVote' );
 
//Here the real function starts.
function plgContentVote( &$row, &$params, $page=0 )
{
 
//Set the JURI
        $uri = & JFactory::getURI();
 
        $id     = $row->id;
 
//$html is made empty
        $html   = '';
 
//Get the rating_count and the parameters from the XML file
        if (isset($row->rating_count) && $params->get( 'show_vote' ) && !$params->get( 'popup' ))
        {
 
//Load the language file
                JPlugin::loadLanguage( 'plg_content_vote' );
 
//Add the general HTML output
                $html .= '<form method="post" action="' . $uri->toString( ) . '">';
                $img = '';
 
//Look for images in template if available
                $starImageOn    = JHTML::_('image.site',  'rating_star.png', '/images/M_images/' );
                $starImageOff   = JHTML::_('image.site',  'rating_star_blank.png', '/images/M_images/' );
 
//Show the 'full' star images when the rate number is higher then 0
                for ($i=0; $i < $row->rating; $i++) {
                        $img .= $starImageOn;
                }
 
//Show the the 'empty' star images when the rate number is less then 5
                for ($i=$row->rating; $i < 5; $i++) {
                        $img .= $starImageOff;
                }
 
//HTML output
                $html .= '<span class="content_rating">';
                $html .= JText::_( 'User Rating' ) .':'. $img .'&nbsp;/&nbsp;';
                $html .= intval( $row->rating_count );
                $html .= "</span>\n<br />\n";
 
//Get params
                if (!$params->get( 'intro_only' ))
                {
 
//HTML output; set the display of the images
                        $html .= '<span class="content_vote">';
                        $html .= JText::_( 'Poor' );
                        $html .= '<input type="radio" alt="vote 1 star" name="user_rating" value="1" />';
                        $html .= '<input type="radio" alt="vote 2 star" name="user_rating" value="2" />';
                        $html .= '<input type="radio" alt="vote 3 star" name="user_rating" value="3" />';
                        $html .= '<input type="radio" alt="vote 4 star" name="user_rating" value="4" />';
                        $html .= '<input type="radio" alt="vote 5 star" name="user_rating" value="5" checked="checked" />';
                        $html .= JText::_( 'Best' );
                        $html .= '&nbsp;<input class="button" type="submit" name="submit_vote" value="'. JText::_( 'Rate' ) .'" />';
                        $html .= '<input type="hidden" name="task" value="vote" />';
                        $html .= '<input type="hidden" name="option" value="com_content" />';
                        $html .= '<input type="hidden" name="cid" value="'. $id .'" />';
                        $html .= '<input type="hidden" name="url" value="'.  $uri->toString( ) .'" />';
                        $html .= '</span>';
                }
//HTML output; close the <form> tag
                $html .= '</form>';
        }
//Return HTML output
        return $html;
}

<?php
//First start with some information about the Content Plugin, its author and probably some other information
/**
* @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' );
 
//Now set the registerEvent. The action will start before the content is opened.
//In plgContentVote you should replace Vote by the name of your own Plugin.
$mainframe->registerEvent( 'onPrepareContent', 'plgContentLoadModule' );
 
//The real function starts here
function plgContentLoadModule( &$row, &$params, $page=0 )
{
//Access the database
        $db =& JFactory::getDBO();
//Check whether the bot should process or not
        if ( JString::strpos( $row->text, 'loadposition' ) === false ) {
                return true;
        }
 
//Get plugin info
        $plugin =& JPluginHelper::getPlugin('content', 'loadmodule');
 
//Search for this tag in the content
        $regex = '/{loadposition\s*.*?}/i';
 
//Access the parameters
        $pluginParams = new JParameter( $plugin->params );
 
//Check whether plugin has been unpublished
        if ( !$pluginParams->get( 'enabled', 1 ) ) {
                $row->text = preg_replace( $regex, '', $row->text );
                return true;
        }
 
//Find all instances of plugin and put in $matches
        preg_match_all( $regex, $row->text, $matches );
 
//Number of plugins
        $count = count( $matches[0] );
 
//Plugin only processes if there are any instances of the plugin in the text
        if ( $count ) {
//Get plugin parameters
                $style  = $pluginParams->def( 'style', -2 );
 
                plgContentProcessPositions( $row, $matches, $count, $regex, $style );
        }
}
//Function to process the posistions in the content
function plgContentProcessPositions ( &$row, &$matches, $count, $regex, $style )
{
        for ( $i=0; $i < $count; $i++ )
        {
 
//Get the correct output for $load
                $load = str_replace( 'loadposition', '', $matches[0][$i] );
                $load = str_replace( '{', '', $load );
                $load = str_replace( '}', '', $load );
                $load = trim( $load );
 
//Load position
                $modules        = plgContentLoadPosition( $load, $style );
                $row->text      = preg_replace( '{'. $matches[0][$i] .'}', $modules, $row->text );
        }
 
//Remove tags without matching module positions
        $row->text = preg_replace( $regex, '', $row->text );
}
 
//Function to load the module in the content
function plgContentLoadPosition( $position, $style=-2 )
{
 
//Get document
        $document       = &JFactory::getDocument();
 
//Load module
        $renderer       = $document->loadRenderer('module');
 
//Load the parameter
        $params         = array('style'=>$style);
 
        $contents = '';
 
        foreach (JModuleHelper::getModules($position) as $mod)  {
                $contents .= $renderer->render($mod, $params);
        }
 
//Return content with loaded modules
        return $contents;
}