Hi,
tpl_modules_listing_display_order.php:
find
Code:
<option value="7" <?php echo ($disp_order == '7' ? 'selected="selected"' : ''); ?>><?php echo TEXT_INFO_SORT_BY_PRODUCTS_DATE; ?></option>
add after
<?php // BOF disp_order by products_quantity ?>
<option value="6" <?php echo ($disp_order == '8' ? 'selected="selected"' : ''); ?>><?php echo TEXT_INFO_SORT_BY_PRODUCTS_QUANTITY; ?></option>
<?php // EOF disp_order by products_quantity ?>
listing_display_order.php
find
Code:
case ($_GET['disp_order'] == 7):
$order_by = " order by p.products_date_added, pd.products_name";
break;
add after
Code:
// BOF disp_order by products_quantity
case ($_GET['disp_order'] == 8):
$order_by = " order by p.products_quantity DESC, pd.products_name";
break;
// EOF disp_order by products_quantity
Also you must define text language constant TEXT_INFO_SORT_BY_PRODUCTS_QUANTITY