Question

我希望得到用户的朋友，然后得到他们的积分。为此我编写了3个函数。但是我坚持要找朋友点。

这是我的代码：

function GET_POINT($p_uid){
    if($p_uid){
        $user_info = mysql_query("SELECT * FROM user_list WHERE fid='{$p_uid}'");
        while($row = mysql_fetch_array($user_info)) {
                $point = $row['point'];
                return $point;
        }
    }
}
function GET_FRIENDS($fl_uid){
    if($fl_uid){
        $friend_list_query = mysql_query("SELECT * FROM friend_list WHERE fid='{$fl_uid}'");
        $friend_list = mysql_fetch_array($friend_list_query);
        return $friend_list;
    }
}
function GET_FRIEND_POINTS($fp_uid){
    $friend_array = GET_FRIENDS($fp_uid);
    $point = '0';
    while($row = $friend_array){
        $point += GET_POINT($row['fri_id']);
    }
    return $point;
}

我做错了什么？

Answer 1

GET_FRIENDS仅返回第一行：

function GET_FRIENDS($fl_uid){
   if ($fl_uid){
       $friend_list_query = mysql_query("SELECT * FROM friend_list WHERE fid='{$fl_uid}'");
       $friend_list = array();
       // fetch all rows and add them to our $friend_list array
       while ($row = mysql_fetch_array($friend_list_query)) {
          $friend_list[] = $row;
       }
       return $friend_list;
   }
}

然后，您需要更新代码以循环遍历数组中的每个元素：

function GET_FRIEND_POINTS($fp_uid){
   $friend_array = GET_FRIENDS($fp_uid);
   $point = 0;
   // loop through each element in the array - you should also check so the array
   // isn't empty before the loop
   foreach ($friend_array as $row) {
      $point += GET_POINT($row['fri_id']);
   }
   return $point;
}

mysql数据库函数。我很难受

1 个答案: