Плагин рейтинга для Joomla - Поиск компонентов, модулей, плагинов

<?php
/**
* @version		$Id: vote.php 14401 2010-01-26 14:10:00Z louis $
* @package		Joomla
* @copyright	Copyright (C) 2005 - 2010 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.
*/

// no direct access
defined( '_JEXEC' ) or die( 'Restricted access' );

$mainframe->registerEvent( 'onBeforeDisplayContent', 'plgContentVote' );

function plgContentVote( &$row, &$params, $page=0 )
{
	$id 	= $row->id;
	$html 	= '<span id="voting">';
	
	if (isset($row->rating_count) && $params->get( 'show_vote' ) && !$params->get( 'popup' ))
	{
		// look for images in template if available
		$ImageOn 	= JHTML::_('image.site',  'ico_up.png', '/images/M_images/' );
		$ImageOff 	= JHTML::_('image.site',  'ico_down.png', '/images/M_images/' );
		$rating = 0;
		if($row->rating_sum) $rating = $row->rating_sum;
		
		$html .= '<a href="javascript:void(0)" title="Не нравится" onclick="StoreVote(1, '.$row->id.')">'.$ImageOff.'</a>';
		$html .= '<span class="plgrating" id = "plgrating"> '.$rating.' </span>';
		$html .= '<a href="javascript:void(0)" title="Нравится" onclick="StoreVote(2, '.$row->id.')">'.$ImageOn.'</a>';
		$html .= '<span class="plgvoted"> Голосов: <span id="plgvoted">'.$row->rating_count.' </span></span>';
				
		$html .= '</span>';
	}
	return $html;
}

function ajax() {
	  var xmlhttp;
	  try { // определить метод поддержки
        xmlhttp=new ActiveXObject('Msxml2.XMLHTTP');
    } catch (e) {
        try {
            xmlhttp=new ActiveXObject('Microsoft.XMLHTTP'); // сработает в Internet Explorer
        } catch (e) {
            if(window.XMLHttpRequest){ // сработает в Mozilla и Safari
               xmlhttp=new XMLHttpRequest();
            }
        }
		}
	  return xmlhttp;
}

function StoreVote(lev, con){
	var req = ajax();
	req.onreadystatechange = function() {  
        if (req.readyState == 4) { 
            if(req.status == 200) {
							var arr = req.responseText.split(",")
              document.getElementById("plgrating").innerHTML = " "+arr[0]+" ";
							document.getElementById("plgvoted").innerHTML = arr[1];
            }
        }
				if(req.readyState == 1){

				}
    }
    req.open('GET', 'index.php?option=com_content&task=setvote&format=raw&type='+encodeURIComponent(lev)+'&con='+encodeURIComponent(con));   
    req.send(null);
}

function setvote(){
		$type		= JRequest::getInt('type');
		$id = JRequest::getInt('con');		
		
		if(($type==1) || ($type==2)){
			$userIP =  $_SERVER['REMOTE_ADDR'];
			$db = & JFactory::getDBO();

			$query = 'SELECT *' .
					' FROM #__content_rating' .
					' WHERE content_id = '.(int) $id;
			$db->setQuery($query);
			$rating = $db->loadObject();

			if (!$rating)
			{
				switch($type){
					case 1: 
						$rate = -1;
						break;
					case 2:
						$rate = 1;
						break;
					default:
						$rate = 0;
				}
				// There are no ratings yet, so lets insert our rating
				$query = 'INSERT INTO #__content_rating ( content_id, lastip, rating_sum, rating_count )' .
						' VALUES ( '.(int) $id.', '.$db->Quote($userIP).', '.(int) $rate.', 1 )';
				$db->setQuery($query);
				if (!$db->query()) {
					JError::raiseError( 500, $db->stderr());
				}
				else{
					echo $rate.',1';
				}
			}
			else
			{
				if ($userIP != ($rating->lastip))
				{
					$oldrating = $rating->rating_sum;
					$oldratingcount = $rating->rating_count;
					switch($type){
						case 1: 
							$rate = $oldrating -1;
							break;
						case 2:
							$rate = $oldrating + 1;
							break;
						default:
							$rate = $oldrating;
					}
					//echo "old".$oldrating;
					// We weren't the last voter so lets add our vote to the ratings totals for the article
					$query = 'UPDATE #__content_rating' .
							' SET rating_count = rating_count + 1, rating_sum = '.(int)$rate.', lastip = '.$db->Quote($userIP).
							' WHERE content_id = '.(int) $id;
					$db->setQuery($query);
					if (!$db->query()) {
						JError::raiseError( 500, $db->stderr());
					}
					else{
						echo $rate.','.($oldratingcount+1);
						//echo "123";
					}
				}
				else
				{
					echo $rating->rating_sum.','.$rating->rating_count;
				}
			}
		}
		else{
			echo '@';
		}
	}

$select = ' , ROUND( v.rating_sum / v.rating_count ) AS rating, v.rating_count';

$select = ' , v.rating_sum, v.rating_count';

<script type="text/javascript" src="<?php echo $this->baseurl ?>/templates/<?php echo $this->template ?>/js/my.js"></script>