ECSHOP 商品评论条件修改——购买过该商品且只能评价一次（购买多少次能评价多少次）

下文转自http://bbs.ecshop.com/thread-1131529-1-1.html

ECSHOP 商品评论条件修改，修改为购买过该商品多少次，就只能评价多少次。
不需要修改数据库，原理简介：先在后台商店设置->基本->评论条件为只有购买过此商品的会员才能评价
ECSHOP原有机制是只要购买过一次，就可以无限评价。
这里老杨加入了简单判断，判断会员对此商品是否进行过评价，获取评价数，再获取此商品的购物次数。评价数不能大于或等于购物次数。
老杨官网原帖：http://www.lyecs.com/article/w-41.html

修改如下：

打开comment.php
找到：(注意，这文件有两处一样的，都要修改！)

     case COMMENT_BOUGHT :
         if ($_SESSION['user_id'] > 0)
         {
             $sql = "SELECT o.order_id".
                    " FROM " . $ecs->table('order_info'). " AS o, ".
                    $ecs->table('order_goods') . " AS og ".
                    " WHERE o.order_id = og.order_id".
                    " AND o.user_id = '" . $_SESSION['user_id'] . "'".
                    " AND og.goods_id = '" . $cmt->id . "'".
                    " AND o.order_status = '" . OS_CONFIRMED . "' ".
                    " AND (o.pay_status = '" . PS_PAYED . "' OR o.pay_status = '" . PS_PAYING . "') ".
                    " AND (o.shipping_status = '" . SS_SHIPPED . "' OR o.shipping_status = '" . SS_RECEIVED . "') ".
                    " LIMIT 1";
              $tmp = $db->getOne($sql);
              if (emptyempty($tmp))
              {
                 $result['error']   = 1;
                 $result['message'] = $_LANG['comment_brought'];
              }
         }  

替换为

     case COMMENT_BOUGHT :
         if ($_SESSION['user_id'] > 0)
         {
             $sql = "SELECT COUNT(o.order_id)".
                    " FROM " . $ecs->table('order_info'). " AS o, ".
                    $ecs->table('order_goods') . " AS og ".
                    " WHERE o.order_id = og.order_id".
                    " AND o.user_id = '" . $_SESSION['user_id'] . "'".
                    " AND og.goods_id = '" . $cmt->id . "'".
                    " AND (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 . "') ".
                    " LIMIT 1";
              $bought_count = $db->getOne($sql);
              if (!$bought_count)
              {
                 $result['error']   = 1;
                 $result['message'] = $_LANG['comment_brought'];
              }else{
                 $sql = "SELECT COUNT(comment_id) FROM " . $ecs->table('comment') .
                     " WHERE user_id = '" . $_SESSION['user_id'] . "'".
                     " AND id_value= '" . $cmt->id . "'".
                     " LIMIT 1";
                 $comment_count = $db->getOne($sql);
                 if($comment_count >= $bought_count){
                     $result['error']   = 1;
                     $result['message'] = '您已对此商品进行过评价！您可以继续购买以便再次评论。';
                 }
              }
         }