<?php
/**
* canonical link handling
*
* @package initSystem
* @copyright Copyright 2003-2011 Zen Cart Development Team
* @copyright Portions Copyright 2003 osCommerce
* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
* @version $Id: init_canonical.php 18697 2011-05-04 14:35:20Z wilt $
*/
if (!defined('IS_ADMIN_FLAG')) {
die('Illegal Access');
}
// cPath is excluded by default
$includeCPath = FALSE;
// EXCLUDE certain parameters which should not be included in canonical links:
$excludeParams = array('zenid', 'action', 'main_page', 'currency', 'typefilter', 'gclid', 'search_in_description', 'pto', 'pfrom', 'dto', 'dfrom', 'inc_subcat');
$excludeParams[] = 'disp_order';
$excludeParams[] = 'page';
$excludeParams[] = 'sort';
$excludeParams[] = 'alpha_filter_id';
$excludeParams[] = 'filter_id';
$excludeParams[] = 'utm_source';
$excludeParams[] = 'utm_medium';
$excludeParams[] = 'utm_content';
$excludeParams[] = 'utm_campaign';
$excludeParams[] = 'language';
$canonicalLink = '';
switch (TRUE) {
/**
* SSL Pages get no special treatment, since they're not normally indexed
*/
case ($request_type == 'SSL' && substr(HTTP_SERVER, 0, 5) === 'http:'):
$canonicalLink = '';
break;
/**
* for canonicals generated by SEO_URLS (esp products linked to multiple categories):
*/
case (isset($seo_urls) && $seo_urls->canonical !== null):
$canonicalLink = $seo_urls->canonical;
break;
/**
* for products (esp those linked to multiple categories):
*/
case (strstr($current_page, '_info') && isset($_GET['products_id'])):
$canonicalLink = zen_href_link($current_page, ($includeCPath ? 'cPath=' . zen_get_generated_category_path_rev(zen_get_products_category_id($_GET['products_id'])) . '&' : '') . 'products_id=' . $_GET['products_id'], $request_type, false);
break;
/**
* for product listings:
*/
case ($current_page == 'index' && isset($_GET['cPath'])):
$canonicalLink = zen_href_link($current_page, zen_get_all_get_params($excludeParams), $request_type, false);
break;
/**
* for music products:
*/
case ($current_page == 'index' && isset($_GET['typefilter']) && $_GET['typefilter'] != '' && ( (isset($_GET['music_genre_id']) && $_GET['music_genre_id'] != '' ) || (isset($_GET['record_company_id']) && $_GET['record_company_id'] != '' ) ) ):
unset($excludeParams[array_search('typefilter', $excludeParams)]);
$canonicalLink = zen_href_link($current_page, zen_get_all_get_params($excludeParams), $request_type, false);
break;
/**
* home page
*/
case ($this_is_home_page):
$canonicalLink = preg_replace('/(index.php)(\?)(main_page=)(index)$/', '', zen_href_link(FILENAME_DEFAULT, '', $request_type, false));
break;
/**
* for new/special/featured listings:
*/
case (in_array($current_page, array('featured_products', 'specials', 'products_new'))):
/**
* for products_all:
*/
case ($current_page == 'products_all'):
/**
* for manufacturer listings:
*/
case ($current_page == 'index' && isset($_GET['manufacturers_id'])):
/**
* for ez-pages:
*/
case ($current_page == 'page' && isset($_GET['id'])):
/**
* all the above cases get treated here:
*/
$canonicalLink = zen_href_link($current_page, zen_get_all_get_params($excludeParams), $request_type, false);
break;
/**
* All others
* uncomment the $canonicalLink = ''; line if you want no special handling for other pages
*/
default:
$canonicalLink = zen_href_link($current_page, zen_get_all_get_params($excludeParams), $request_type, false);
//$canonicalLink = '';
}
//$my_url = ($request_type == 'SSL' ? 'https://' : 'http://') . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
//if($canonicalLink == $my_url) $canonicalLink = '';
//unset($my_url);
unset($excludeParams, $includeCPath);