如何使用php将opencart应用程序连接到sql server数据库

Question

嗨伙计们,我正在尝试使用PHP制作一个开放的购物车应用程序,我想连接它一个SQL服务器数据库而不是mysql数据库,我有以下错误:Call to undefined function DB\mssql_connect(),我设置我的配置文件:

<?php
// HTTP
define('HTTP_SERVER', 'http://localhost/restaurant/admin/');
define('HTTP_CATALOG', 'http://localhost/restaurant/');

// HTTPS
define('HTTPS_SERVER', 'http://localhost/restaurant/admin/');
define('HTTPS_CATALOG', 'http://localhost/restaurant/');

// DIR
define('DIR_APPLICATION', 'E:/my work/wamp/www/restaurant/admin/');
define('DIR_SYSTEM', 'E:/my work/wamp/www/restaurant/system/');
define('DIR_IMAGE', 'E:/my work/wamp/www/restaurant/image/');
define('DIR_LANGUAGE', 'E:/my work/wamp/www/restaurant/admin/language/');
define('DIR_TEMPLATE', 'E:/my work/wamp/www/restaurant/admin/view/template/');
define('DIR_CONFIG', 'E:/my work/wamp/www/restaurant/system/config/');
define('DIR_CACHE', 'E:/my work/wamp/www/restaurant/system/storage/cache/');
define('DIR_DOWNLOAD', 'E:/my work/wamp/www/restaurant/system/storage/download/');
define('DIR_LOGS', 'E:/my work/wamp/www/restaurant/system/storage/logs/');
define('DIR_MODIFICATION', 'E:/my work/wamp/www/restaurant/system/storage/modification/');
define('DIR_UPLOAD', 'E:/my work/wamp/www/restaurant/system/storage/upload/');
define('DIR_CATALOG', 'E:/my work/wamp/www/restaurant/catalog/');

// DB
define('DB_DRIVER', 'mssql');
define('DB_HOSTNAME', 'localhost');
define('DB_USERNAME', 'root');
define('DB_PASSWORD', '');
define('DB_DATABASE', 'AndlusMarket');
define('DB_PORT', '1433');
define('DB_PREFIX', 'oc_');

我搜索了很多解决方案,但很多人说很难有人帮助我吗？