shopping_cart.php

每个RFC 3261信息头有一个相应的存取标识. 但是,许多信息头拥有同样的形式。 例如。To和From的信息头都是由显示名和一个URI组成。 To和From信息头用来管理与处理NameAddr实例的

<?php
/*
  $Id: shopping_cart.php,v 1.35 2003/06/25 21:14:33 hpdl Exp $

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

  Copyright (c) 2003 osCommerce

  Released under the GNU General Public License
*/

  class shoppingCart {
    var $contents, $total, $weight, $cartID, $content_type;

    function shoppingCart() {
      $this->reset();
    }

    function restore_contents() {
      global $customer_id;

      if (!tep_session_is_registered('customer_id')) return false;

// insert current cart contents in database
      if (is_array($this->contents)) {
        reset($this->contents);
        while (list($products_id, ) = each($this->contents)) {
          $qty = $this->contents[$products_id]['qty'];
          $product_query = tep_db_query("select products_id from " . TABLE_CUSTOMERS_BASKET . " where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products_id) . "'");
          if (!tep_db_num_rows($product_query)) {
            tep_db_query("insert into " . TABLE_CUSTOMERS_BASKET . " (customers_id, products_id, customers_basket_quantity, customers_basket_date_added) values ('" . (int)$customer_id . "', '" . tep_db_input($products_id) . "', '" . $qty . "', '" . date('Ymd') . "')");
            if (isset($this->contents[$products_id]['attributes'])) {
              reset($this->contents[$products_id]['attributes']);
              while (list($option, $value) = each($this->contents[$products_id]['attributes'])) {
                tep_db_query("insert into " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " (customers_id, products_id, products_options_id, products_options_value_id) values ('" . (int)$customer_id . "', '" . tep_db_input($products_id) . "', '" . (int)$option . "', '" . (int)$value . "')");
              }
            }
          } else {
            tep_db_query("update " . TABLE_CUSTOMERS_BASKET . " set customers_basket_quantity = '" . $qty . "' where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products_id) . "'");
          }
        }
      }

// reset per-session cart contents, but not the database contents
      $this->reset(false);

      $products_query = tep_db_query("select products_id, customers_basket_quantity from " . TABLE_CUSTOMERS_BASKET . " where customers_id = '" . (int)$customer_id . "'");
      while ($products = tep_db_fetch_array($products_query)) {
        $this->contents[$products['products_id']] = array('qty' => $products['customers_basket_quantity']);
// attributes
        $attributes_query = tep_db_query("select products_options_id, products_options_value_id from " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products['products_id']) . "'");
        while ($attributes = tep_db_fetch_array($attributes_query)) {
          $this->contents[$products['products_id']]['attributes'][$attributes['products_options_id']] = $attributes['products_options_value_id'];
        }
      }

      $this->cleanup();
    }

    function reset($reset_database = false) {
      global $customer_id;

      $this->contents = array();
      $this->total = 0;
      $this->weight = 0;
      $this->content_type = false;

      if (tep_session_is_registered('customer_id') && ($reset_database == true)) {
        tep_db_query("delete from " . TABLE_CUSTOMERS_BASKET . " where customers_id = '" . (int)$customer_id . "'");
        tep_db_query("delete from " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " where customers_id = '" . (int)$customer_id . "'");
      }

      unset($this->cartID);
      if (tep_session_is_registered('cartID')) tep_session_unregister('cartID');
    }

    function add_cart($products_id, $qty = '1', $attributes = '', $notify = true) {
      global $new_products_id_in_cart, $customer_id;

      $products_id = tep_get_uprid($products_id, $attributes);
      if ($notify == true) {
        $new_products_id_in_cart = $products_id;
        tep_session_register('new_products_id_in_cart');
      }

      if ($this->in_cart($products_id)) {
        $this->update_quantity($products_id, $qty, $attributes);
      } else {
        $this->contents[] = array($products_id);
        $this->contents[$products_id] = array('qty' => $qty);
// insert into database
        if (tep_session_is_registered('customer_id')) tep_db_query("insert into " . TABLE_CUSTOMERS_BASKET . " (customers_id, products_id, customers_basket_quantity, customers_basket_date_added) values ('" . (int)$customer_id . "', '" . tep_db_input($products_id) . "', '" . $qty . "', '" . date('Ymd') . "')");

        if (is_array($attributes)) {
          reset($attributes);
          while (list($option, $value) = each($attributes)) {
            $this->contents[$products_id]['attributes'][$option] = $value;
// insert into database
            if (tep_session_is_registered('customer_id')) tep_db_query("insert into " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " (customers_id, products_id, products_options_id, products_options_value_id) values ('" . (int)$customer_id . "', '" . tep_db_input($products_id) . "', '" . (int)$option . "', '" . (int)$value . "')");
          }
        }
      }
      $this->cleanup();

// assign a temporary unique ID to the order contents to prevent hack attempts during the checkout procedure
      $this->cartID = $this->generate_cart_id();
    }

    function update_quantity($products_id, $quantity = '', $attributes = '') {
      global $customer_id;

      if (empty($quantity)) return true; // nothing needs to be updated if theres no quantity, so we return true..

      $this->contents[$products_id] = array('qty' => $quantity);
// update database
      if (tep_session_is_registered('customer_id')) tep_db_query("update " . TABLE_CUSTOMERS_BASKET . " set customers_basket_quantity = '" . $quantity . "' where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products_id) . "'");

      if (is_array($attributes)) {
        reset($attributes);
        while (list($option, $value) = each($attributes)) {
          $this->contents[$products_id]['attributes'][$option] = $value;
// update database
          if (tep_session_is_registered('customer_id')) tep_db_query("update " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " set products_options_value_id = '" . (int)$value . "' where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products_id) . "' and products_options_id = '" . (int)$option . "'");
        }
      }
    }

    function cleanup() {
      global $customer_id;

      reset($this->contents);
      while (list($key,) = each($this->contents)) {
        if ($this->contents[$key]['qty'] < 1) {
          unset($this->contents[$key]);
// remove from database
          if (tep_session_is_registered('customer_id')) {
            tep_db_query("delete from " . TABLE_CUSTOMERS_BASKET . " where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($key) . "'");
            tep_db_query("delete from " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($key) . "'");
          }
        }
      }
    }

    function count_contents() {  // get total number of items in cart 
      $total_items = 0;
      if (is_array($this->contents)) {
        reset($this->contents);
        while (list($products_id, ) = each($this->contents)) {
          $total_items += $this->get_quantity($products_id);
        }
      }

      return $total_items;
    }

    function get_quantity($products_id) {
      if (isset($this->contents[$products_id])) {
        return $this->contents[$products_id]['qty'];
      } else {
        return 0;
      }
    }

    function in_cart($products_id) {
      if (isset($this->contents[$products_id])) {
        return true;
      } else {
        return false;
      }
    }

    function remove($products_id) {
      global $customer_id;

      unset($this->contents[$products_id]);
// remove from database
      if (tep_session_is_registered('customer_id')) {
        tep_db_query("delete from " . TABLE_CUSTOMERS_BASKET . " where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products_id) . "'");
        tep_db_query("delete from " . TABLE_CUSTOMERS_BASKET_ATTRIBUTES . " where customers_id = '" . (int)$customer_id . "' and products_id = '" . tep_db_input($products_id) . "'");
      }

// assign a temporary unique ID to the order contents to prevent hack attempts during the checkout procedure
      $this->cartID = $this->generate_cart_id();
    }

    function remove_all() {
      $this->reset();
    }

    function get_product_id_list() {