ecshop购买了某商品才能评价且只能评价一次

    ECSHOP 购买条件优化-购买过几件该商品，就只能评价几次

    ECSHOP原有机制是只要购买过一次，就可以无限评价。
    我们则需要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。

    第一步：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
    第二步：

    打开comment.php
    找到：如下代码(PS您会找到两处，都要替换)
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 . "') "; 
$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 . "'"; 
$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。'; 
} 
} 
}