Помогите исправить ошибки php в плагине jautometa для joomla:

Strict Standards: Only variables should be assigned by reference in /kunden/112919_55497/kuehn/plugins/content/jautometa/jautometa.php on line 25:

$app =& JFactory::getApplication();

Strict Standards: Only variables should be assigned by reference in /kunden/112919_55497/kuehn/plugins/content/jautometa/jautometa.php on line 71

$document =& JFactory::getDocument();

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /kunden/112919_55497/kuehn/plugins/content/jautometa/jautometa.php on line 101

content = preg_replace($regex, '', $content);

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /kunden/112919_55497/kuehn/plugins/content/jautometa/jautometa.php on line 141

$keyw = preg_replace($regex, '', $keyw);

Вот весь файл jautometa.php:

<?php
/**
* @version		2.2 jAutoMeta.php 2013-08-01
* @package		Joomla
* @subpackage	jAutoMeta
* @author		VMLab
* @link 		http://www.vmlab.it/
* @copyright	Copyright © 2012 - 2013 VMLab. All rights reserved.
* @license		GNU/GPL
* This plugin will automatically generate Meta Tags from your articles content.
*/

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

jimport( 'joomla.plugin.plugin' );

class  plgContentJautometa extends JPlugin {

	public function __construct(&$subject, $config){
			parent::__construct($subject, $config);
	}
	
	public function onContentPrepare($context, &$article, &$params, $page=0 ){
		$app =& JFactory::getApplication();
        /* @var $app JApplication */

        if($app->isAdmin()) {
            return;
        }
        
        $doc     = JFactory::getDocument();
        /* @var $doc JDocumentHtml */
        $docType = $doc->getType();
        
        // Check document type
        if(strcmp("html", $docType) != 0){
            return;
        }
		
		$currentOption = JRequest::getCmd("option");
        $currentView = JRequest::getCmd("view");
        		
        if( $currentOption != "com_content" || $currentView != "article" || !isset($this->params)) {
            return;            
        }
		
		if($article->id==""){return;}
		
		if ($context = 'com_content.article') {
			$catsID = $this->params->get("category");
			if($catsID){
				$catsID = '@,'.str_replace(' ','',$catsID).',';
				$artcatID = ','.$article->catid.',';
				$selectedcategory = strpos($catsID,$artcatID);
				if($selectedcategory > 0){
					$replacemeta = true;
				}else{
					$replacemeta = false;
				}
			}else{
				$replacemeta = true;
			}
			
			if($replacemeta){
								
				$charset = $this->params->get("charset");
				$length = $this->params->get("length");
				$minlength = $this->params->get("minlength");
				$count = $this->params->get("count");
				$document =& JFactory::getDocument();
				
				$description = $this->generateDescription($article->text,$charset);
				
				$toKey = $description;
				
				$description = rtrim(substr($description,0,$length));
				
				$document->setMetaData('description', $description);
				
				if($this->params->get("keywords") == "title")$generateKey = $article->title;
				if($this->params->get("keywords") == "content")$generateKey = $toKey;
				if($this->params->get("keywords") == "both")$generateKey = $article->title.' '.$toKey;
								
				$keywords = $this->generateKeywords($generateKey,$minlength,$count,$charset);
				$document->setMetaData('keywords', $keywords);
			}
		}
	}
		
	public function generateDescription($content,$charset){
		$content = preg_replace( "'<script[^>]*>.*?</script>'si", '', $content );		
		$content = preg_replace( '/<!--.+?-->/', '', $content );
		$content = preg_replace( '/{.+?}/', '', $content );
		$content = strip_tags( $content );
		$content = preg_replace( '/<a\s+.*?href="([^"]+)"[^>]*>([^<]+)<\/a>/is', '\2 (\1)', $content );
		$content = preg_replace('/<[^>]*>/', ' ', $content);
		
		// Remove any email addresses
		$regex = '/(([_A-Za-z0-9-]+)(\\.[_A-Za-z0-9-]+)*@([A-Za-z0-9-]+)(\\.[A-Za-z0-9-]+)*)/iex';
		$content = preg_replace($regex, '', $content);
		
		// convert html entities to chars
		$content = html_entity_decode($content,ENT_QUOTES,$charset);

	
		$content = str_replace('"', '\'', $content); //Make sure all quotes play nice with meta.
				$content = str_replace(array("\r\n", "\r", "\n", "\t"), " ", $content); //Change spaces to spaces
		
		// remove any extra spaces
		while (strchr($content,"  ")) {
			$content = str_replace("  ", " ",$content);
		}
		
		// general sentence tidyup
		for ($cnt = 1; $cnt < JString::strlen($content)-1; $cnt++) {
			// add a space after any full stops or comma's for readability
			// added as strip_tags was often leaving no spaces
			if ( ($content{$cnt} == '.') || (($content{$cnt} == ',') && !(is_numeric($content{$cnt+1})))) {
				if ($content{$cnt+1} != ' ') {
					$content = JString::substr_replace($content, ' ', $cnt + 1, 0);
				}
			}
		}
		
		return trim($content);
	
	}
	
	public function generateKeywords($keyw,$minlength,$count,$charset){
		$keyw = str_replace(array(",",".",";",":","!","(",")","?")," ",$keyw);
		$keyw = preg_replace( "'<script[^>]*>.*?</script>'si", '', $keyw );		
		$keyw = preg_replace( '/<!--.+?-->/', '', $keyw );
		$keyw = preg_replace( '/{.+?}/', '', $keyw );
		//$keyw = strip_tags( $keyw );
		$keyw = preg_replace( '/<a\s+.*?href="([^"]+)"[^>]*>([^<]+)<\/a>/is', '\2 (\1)', $keyw );
		$keyw = preg_replace('/<[^>]*>/', ' ', $keyw);
		
		// Remove any email addresses
		$regex = '/(([_A-Za-z0-9-]+)(\\.[_A-Za-z0-9-]+)*@([A-Za-z0-9-]+)(\\.[A-Za-z0-9-]+)*)/iex';
		$keyw = preg_replace($regex, '', $keyw);
		
		// convert html entities to chars
		$keyw = html_entity_decode($keyw,ENT_QUOTES,$charset);

		
		$keyw = str_replace('"', '\'', $keyw); //Make sure all quotes play nice with meta.
				$keyw = str_replace(array("\r\n", "\r", "\n", "\t"), " ", $keyw); //Change spaces to spaces
		
		// remove any extra spaces
		while (strchr($keyw,"  ")) {
			$keyw = str_replace("  ", " ",$keyw);
		}
			
		// general sentence tidyup
		for ($cnt = 1; $cnt < JString::strlen($keyw)-1; $cnt++) {
			// add a space after any full stops or comma's for readability
			// added as strip_tags was often leaving no spaces
			if ( ($keyw{$cnt} == '.') || (($keyw{$cnt} == ',') && !(is_numeric($keyw{$cnt+1})))) {
				if ($keyw{$cnt+1} != ' ') {
					$keyw = JString::substr_replace($keyw, ' ', $cnt + 1, 0);
				}
			}
		}
		
		$keyw = str_replace(" ", ",", trim($keyw));
		
		$stickArray = explode(",", $keyw);
		
		$keysArray = array_count_values($stickArray);
		
		arsort($keysArray);
		$i = 1;
		$keywords = "";
		$gkeywords = "";
		
		if (JString::strlen($keyw)>0) {
		 foreach($keysArray as $word => $instances){
			if(JString::strlen(trim($word)) >= $minlength && is_string($word)){
			if($i > $count)
				break;
				if(in_array($word,$stickArray)) {
				$gkeywords .= $word . ",";
				$i++;
			 }
			}
		 }
		}
		$keywords = $gkeywords;
		$keywords = JString::rtrim($keywords, ",");
		return $keywords;
	}
}
?>

Заранее благодарен за помощь.

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