ecshop获取商品销量函数

以下函数会获取订单状态为已完成的订单中该商品的销量，此函数放在lib_goods.php文件中即可调用

/**
 * 获取商品销量
 *
 * @access      public
 * @param       string      $goods_id
 * @return      int
 */
function selled_count($goods_id)
{
 $sql = 'SELECT SUM(og.goods_number) as count ' .
           'FROM ' . $GLOBALS['ecs']->table('order_goods') . ' AS og ' .
           'LEFT JOIN ' .$GLOBALS['ecs']->table('order_info') . ' AS o ' .
           "ON og.order_id = o.order_id " .
           "WHERE (o.order_status = '" . OS_CONFIRMED .  "' OR o.order_status = '" . OS_SPLITED . "') " .
           "AND (o.pay_status = '" . PS_PAYED . "' OR o.pay_status = '" . PS_PAYING . "') " .
           "AND (o.shipping_status = '" . SS_SHIPPED . "' OR o.shipping_status = '" . SS_RECEIVED . "') " .
           "AND og.goods_id ='" .$goods_id . "'";
 $res = $GLOBALS['db']->getOne($sql);
 if($res>0)
 {
  return $res;
 }
 else
 {
  return('0');
 }
}