Ecshop二次开发修改购物车逻辑的教程

function add_to_cart($goods_id, $num = 1, $spec = array(), $parent = 0)
{
    // 你的自定义逻辑
    if (is_array($goods_id)) {
        foreach ($goods_id as $id => $quantity) {
            $GLOBALS['db']->autoExecute($GLOBALS['ecs']->table('cart'), array(
                'user_id'    => $_SESSION['user_id'],
                'session_id' => SESS_ID,
                'goods_id'   => $id,
                'goods_sn'   => $GLOBALS['db']->getOne("SELECT goods_sn FROM " . $GLOBALS['ecs']->table('goods') . " WHERE goods_id = '$id'"),
                'product_id' => 0,
                'group_id'   => 0,
                'goods_name' => $GLOBALS['db']->getOne("SELECT goods_name FROM " . $GLOBALS['ecs']->table('goods') . " WHERE goods_id = '$id'"),
                'market_price' => $GLOBALS['db']->getOne("SELECT market_price FROM " . $GLOBALS['ecs']->table('goods') . " WHERE goods_id = '$id'"),
                'goods_price' => $GLOBALS['db']->getOne("SELECT shop_price FROM " . $GLOBALS['ecs']->table('goods') . " WHERE goods_id = '$id'"),
                'goods_number' => $quantity,
                'goods_attr' => '',
                'is_real'    => 1,
                'extension_code' => '',
                'parent_id'  => 0,
                'rec_type'   => CART_GENERAL_GOODS
            ), 'INSERT');
        }
    } else {
        // 原有的单个商品添加逻辑
    }
    return true;
}

function checkout($cart_value)
{
    // 你的自定义折扣逻辑
    if ($cart_value > 1000) {
        $discount = $cart_value * 0.1; // 10% 折扣
        $cart_value -= $discount;
    }
    return $cart_value;
}