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HomeBackend DevelopmentPHP Tutorial开发商城系统,遇到的问题

在开发一套商城系统过程中,每个商品定义了一个年龄段,比如:1,2,3,4,5 总共5个。
已从购物车中获取到了goods_id的编号 。
现在的需求是当购物车中的商品,有2个年龄段(这里的意思是指:1-5个,中间随取2个).那结算就是9.5折。
当有3个年龄段(同理,1-5之间,有3个年龄段),那么就是9折。
有一点需要注意的是:随取2个或者是3个,但是不能重复,比如:购物车中有2个年龄段1,那是不打折的。

代码:

$a=array(30,31,32,33,34);//数组中的值就是购物车中商品的goods_id编号。//数据库的商品表(goods)中存在一个字段goods_age,就是上面的(1,2,3,4,5)年龄段。


回复讨论(解决方案)

$a_str = implode("','",$a);$res = mysql_query("select goods_age from goods where goods_id in ('$a_str') group by goods_age");$count = mysql_num_rows($res);

利用分组 每个age一组 统计组数 就可以了

ecshop开源系统

你这个所谓的年纪段应当就是type=1,2,3,4,5这种的吧。。思路应当是group by type 得到查询结果,看有多少条记录就是多少个type..再对应打多少打吧。不难。

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