Duplicate Pages in Joomla - solution

The same page can be accessed by multiple url's:
For example:
site.com/index.php?option=com_content&view=article&id=22
site.com/news/tech/1.html
site.com/news/tech/1-news.html
site.com/news/tech/1-newsnewsnewnsnsns.html
site.com/1-news/2-tech/1dsfsdkgjdfgklhfdgjf
site.com/home/1.html

This is not good.
The solution - automatic redirect to a normal url
For frontpage:
/templates/your-theme/html/com_content/frontpage/default.php
Paste this code(first line file)

<?php defined('_JEXEC') or die('Restricted access');
$this->original_link = "/";
if (JRequest::getInt('start') > 0) $this->original_link .= "index.php?start=" . JRequest::getVar('start');
$this->real_link = JRequest::getURI();
if ($this->original_link != $this->real_link) JApplication::redirect($this->original_link);
?>

Code (markup):

For Pages (Articles):
/templates/your-theme/html/com_content/article/default.php

<?php defined('_JEXEC') or die('Restricted access');
if ($this->article->readmore_link != JRequest::getURI()) JApplication::redirect($this->article->readmore_link);
?>

Code (markup):

For Category:
/templates/your-theme/html/com_content/category/blog.php

<?php defined('_JEXEC') or die('Restricted access');
$this->original_link = JRoute::_(ContentHelperRoute::getCategoryRoute(JRequest::getVar('id'), 0));
if (JRequest::getInt('start') > 0) $this->original_link .= "?start=" . JRequest::getVar('start');
$this->real_link = JRequest::getURI();
if ($this->original_link != $this->real_link) JApplication::redirect($this->original_link);
?>

Code (markup):

For Section:
/templates/your-theme/html/com_content/section/blog.php

<?php defined('_JEXEC') or die('Restricted access');
$this->original_link = JRoute::_(ContentHelperRoute::getSectionRoute(JRequest::getVar('id')));
if (JRequest::getInt('start') > 0) $this->original_link .= "?start=" . JRequest::getVar('start');
$this->real_link = JRequest::getURI();
if ($this->original_link != $this->real_link) JApplication::redirect($this->original_link);
?>

Code (markup):

Try it. Enjoy.
Author:

 

Highly useful, thank you. i was looking for this solutions since ages for my joomla forum website abeyaar.com