index.php

<?php
/*
  $Id$

  osCommerce, Open Source E-Commerce Solutions
  http://www.oscommerce.com

  Copyright (c) 2020 osCommerce

  Released under the GNU General Public License
*/

  require 'includes/application_top.php';

// the following cPath references come from application_top.php
  $category_depth = 'top';
  if (isset($cPath) && tep_not_null($cPath)) {
    $categories_products_query = tep_db_query("SELECT COUNT(*) AS total FROM products_to_categories WHERE categories_id = " . (int)$current_category_id);
    $categories_products = tep_db_fetch_array($categories_products_query);
    if ($categories_products['total'] > 0) {
      $category_depth = 'products'; // display products
    } else {
      $category_parent_query = tep_db_query("SELECT COUNT(*) AS total FROM categories WHERE parent_id = " . (int)$current_category_id);
      $category_parent = tep_db_fetch_array($category_parent_query);
      if ($category_parent['total'] > 0) {
        $category_depth = 'nested'; // navigate through the categories
      } else {
        $category_depth = 'products'; // category has no products, but display the 'no products' message
      }
    }
  }

  require "includes/languages/$language/index.php";

  require $oscTemplate->map_to_template(__FILE__, 'page');

  require 'includes/application_bottom.php';