It looks like you may have issues on how you changed the file:
/includes/index_filters/default_filter.php
try the code:
<?php
/**
* default_filter.php for index filters
*
* index filter for the default product type
* show the products of a specified manufacturer
*
* @package productTypes
* @copyright Copyright 2003-2009 Zen Cart Development Team
* @copyright Portions Copyright 2003 osCommerce
* @todo Need to add/fine-tune ability to override or insert entry-points on a per-product-type basis
* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
* @version $Id: default_filter.php 14870 2009-11-19 22:36:24Z drbyte $
*/
if (!defined('IS_ADMIN_FLAG')) {
die('Illegal Access');
}
if (isset($_GET['sort']) && strlen($_GET['sort']) > 3) {
$_GET['sort'] = substr($_GET['sort'], 0, 3);
}
if (isset($_GET['alpha_filter_id']) && (int)$_GET['alpha_filter_id'] > 0) {
$alpha_sort = " and pd.products_name LIKE '" . chr((int)$_GET['alpha_filter_id']) . "%' ";
} else {
$alpha_sort = '';
}
if (!isset($select_column_list)) $select_column_list = "";
// show the products of a specified manufacturer
if (isset($_GET['manufacturers_id']) && $_GET['manufacturers_id'] != '' ) {
if (isset($_GET['filter_id']) && zen_not_null($_GET['filter_id'])) {
// We are asked to show only a specific category
$listing_sql = "select " . $select_column_list . " p.products_id, p.products_type, p.master_categories_id, p.manufacturers_id, p.products_price, p.products_tax_class_id, pd.products_description, if(s.status = 1, s.specials_new_products_price, NULL) AS specials_new_products_price, IF(s.status = 1, s.specials_new_products_price, p.products_price) as final_price, p.products_sort_order, p.product_is_call, p.product_is_always_free_shipping, p.products_qty_box_status
from " . TABLE_PRODUCTS . " p left join " . TABLE_SPECIALS . " s on p.products_id = s.products_id , " .
TABLE_PRODUCTS_DESCRIPTION . " pd, " .
TABLE_MANUFACTURERS . " m, " .
TABLE_PRODUCTS_TO_CATEGORIES . " p2c
where p.products_status = 1
and p.manufacturers_id = m.manufacturers_id
and m.manufacturers_id = '" . (int)$_GET['manufacturers_id'] . "'
and p.products_id = p2c.products_id
and pd.products_id = p2c.products_id
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'
and p2c.categories_id = '" . (int)$_GET['filter_id'] . "'" .
$alpha_sort;
} else {
// We show them all
$listing_sql = "select " . $select_column_list . " p.products_id, p.products_type, p.master_categories_id, p.manufacturers_id, p.products_price, p.products_tax_class_id, pd.products_description, IF(s.status = 1, s.specials_new_products_price, NULL) as specials_new_products_price, IF(s.status = 1, s.specials_new_products_price, p.products_price) as final_price, p.products_sort_order, p.product_is_call, p.product_is_always_free_shipping, p.products_qty_box_status
from " . TABLE_PRODUCTS . " p left join " . TABLE_SPECIALS . " s on p.products_id = s.products_id, " .
TABLE_PRODUCTS_DESCRIPTION . " pd, " .
TABLE_MANUFACTURERS . " m
where p.products_status = 1
and pd.products_id = p.products_id
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'
and p.manufacturers_id = m.manufacturers_id
and m.manufacturers_id = '" . (int)$_GET['manufacturers_id'] . "'" .
$alpha_sort;
}
} else {
// show the products in a given category
if (isset($_GET['filter_id']) && zen_not_null($_GET['filter_id'])) {
// We are asked to show only specific category
$listing_sql = "select " . $select_column_list . " p.products_id, p.products_type, p.master_categories_id, p.manufacturers_id, p.products_price, p.products_tax_class_id, pd.products_description, IF(s.status = 1, s.specials_new_products_price, NULL) as specials_new_products_price, IF(s.status = 1, s.specials_new_products_price, p.products_price) as final_price, p.products_sort_order, p.product_is_call, p.product_is_always_free_shipping, p.products_qty_box_status
from " . TABLE_PRODUCTS . " p left join " . TABLE_SPECIALS . " s on p.products_id = s.products_id, " .
TABLE_PRODUCTS_DESCRIPTION . " pd, " .
TABLE_MANUFACTURERS . " m, " .
TABLE_PRODUCTS_TO_CATEGORIES . " p2c
where p.products_status = 1
and p.manufacturers_id = m.manufacturers_id
and m.manufacturers_id = '" . (int)$_GET['filter_id'] . "'
and p.products_id = p2c.products_id
and pd.products_id = p2c.products_id
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'
and p2c.categories_id = '" . (int)$current_category_id . "'" .
$alpha_sort;
} else {
// We show them all
$listing_sql = "select " . $select_column_list . " p.products_id, p.products_type, p.master_categories_id, p.manufacturers_id, p.products_price, p.products_tax_class_id, pd.products_description, IF(s.status = 1, s.specials_new_products_price, NULL) as specials_new_products_price, IF(s.status =1, s.specials_new_products_price, p.products_price) as final_price, p.products_sort_order, p.product_is_call, p.product_is_always_free_shipping, p.products_qty_box_status
from " . TABLE_PRODUCTS_DESCRIPTION . " pd, " .
TABLE_PRODUCTS . " p left join " . TABLE_MANUFACTURERS . " m on p.manufacturers_id = m.manufacturers_id, " .
TABLE_PRODUCTS_TO_CATEGORIES . " p2c left join " . TABLE_SPECIALS . " s on p2c.products_id = s.products_id
where p.products_status = 1
and p.products_id = p2c.products_id
and pd.products_id = p2c.products_id
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'
and p2c.categories_id = '" . (int)$current_category_id . "'" .
$alpha_sort;
}
}
// set the default sort order setting from the Admin when not defined by customer
if (!isset($_GET['sort']) and PRODUCT_LISTING_DEFAULT_SORT_ORDER != '') {
$_GET['sort'] = PRODUCT_LISTING_DEFAULT_SORT_ORDER;
}
if (isset($column_list)) {
if ((!isset($_GET['sort'])) || (isset($_GET['sort']) && !preg_match('/[1-8][ad]/', $_GET['sort'])) || (substr($_GET['sort'], 0, 1) > sizeof($column_list)) ) {
for ($i=0, $n=sizeof($column_list); $i<$n; $i++) {
if (isset($column_list[$i]) && $column_list[$i] == 'PRODUCT_LIST_NAME') {
$_GET['sort'] = $i+1 . 'a';
// $listing_sql .= " order by p.products_sort_order, pd.products_name";
$listing_sql .= " order by sort_sold DESC, p.products_sort_order, pd.products_name";
break;
} else {
// sort by products_sort_order when PRODUCT_LISTING_DEFAULT_SORT_ORDER is left blank
// for reverse, descending order use:
// $listing_sql .= " order by p.products_sort_order desc, pd.products_name";
$listing_sql .= " order by sort_sold DESC, p.products_sort_order, pd.products_name";
break;
}
}
// if set to nothing use products_sort_order and PRODUCTS_LIST_NAME is off
if (PRODUCT_LISTING_DEFAULT_SORT_ORDER == '') {
$_GET['sort'] = '20a';
}
} else {
$sort_col = substr($_GET['sort'], 0 , 1);
$sort_order = substr($_GET['sort'], 1);
switch ($column_list[$sort_col-1]) {
case 'PRODUCT_LIST_MODEL':
// $listing_sql .= " order by p.products_model " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
$listing_sql .= " order by sort_sold DESC, p.products_model " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
break;
case 'PRODUCT_LIST_NAME':
// $listing_sql .= " order by pd.products_name " . ($sort_order == 'd' ? 'desc' : '');
$listing_sql .= " order by sort_sold DESC, sort_sold, pd.products_name " . ($sort_order == 'd' ? 'desc' : '');
break;
case 'PRODUCT_LIST_MANUFACTURER':
// $listing_sql .= " order by m.manufacturers_name " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
$listing_sql .= " order by sort_sold DESC, m.manufacturers_name " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
break;
case 'PRODUCT_LIST_QUANTITY':
// $listing_sql .= " order by p.products_quantity " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
$listing_sql .= " order by sort_sold DESC, p.products_quantity " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
break;
case 'PRODUCT_LIST_IMAGE':
// $listing_sql .= " order by pd.products_name";
$listing_sql .= " order by sort_sold DESC, pd.products_name";
break;
case 'PRODUCT_LIST_WEIGHT':
// $listing_sql .= " order by p.products_weight " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
$listing_sql .= " order by sort_sold DESC, p.products_weight " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
break;
case 'PRODUCT_LIST_PRICE':
// $listing_sql .= " order by p.products_price_sorter " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
$listing_sql .= " order by sort_sold DESC, p.products_price_sorter " . ($sort_order == 'd' ? 'desc' : '') . ", pd.products_name";
break;
}
}
}
// optional Product List Filter
if (PRODUCT_LIST_FILTER > 0) {
if (isset($_GET['manufacturers_id']) && $_GET['manufacturers_id'] != '') {
$filterlist_sql = "select distinct c.categories_id as id, cd.categories_name as name
from " . TABLE_PRODUCTS . " p, " .
TABLE_PRODUCTS_TO_CATEGORIES . " p2c, " .
TABLE_CATEGORIES . " c, " .
TABLE_CATEGORIES_DESCRIPTION . " cd
where p.products_status = 1
and p.products_id = p2c.products_id
and p2c.categories_id = c.categories_id
and p2c.categories_id = cd.categories_id
and cd.language_id = '" . (int)$_SESSION['languages_id'] . "'
and p.manufacturers_id = '" . (int)$_GET['manufacturers_id'] . "'
order by cd.categories_name";
} else {
$filterlist_sql= "select distinct m.manufacturers_id as id, m.manufacturers_name as name
from " . TABLE_PRODUCTS . " p, " .
TABLE_PRODUCTS_TO_CATEGORIES . " p2c, " .
TABLE_MANUFACTURERS . " m
where p.products_status = 1
and p.manufacturers_id = m.manufacturers_id
and p.products_id = p2c.products_id
and p2c.categories_id = '" . (int)$current_category_id . "'
order by m.manufacturers_name";
}
$do_filter_list = false;
$filterlist = $db->Execute($filterlist_sql);
if ($filterlist->RecordCount() > 1) {
$do_filter_list = true;
if (isset($_GET['manufacturers_id'])) {
$getoption_set = true;
$get_option_variable = 'manufacturers_id';
$options = array(array('id' => '', 'text' => TEXT_ALL_CATEGORIES));
} else {
$options = array(array('id' => '', 'text' => TEXT_ALL_MANUFACTURERS));
}
while (!$filterlist->EOF) {
$options[] = array('id' => $filterlist->fields['id'], 'text' => $filterlist->fields['name']);
$filterlist->MoveNext();
}
}
}
