判断 if isset empty

1 if (empty($order_id) || empty($action_array))
2     {
3         return $return_res;
4     }

1  if (!isset($operable_list['remove']))
2     {
3         make_json_error('Hacking attempt');
4         exit;
5     }

 1 elseif ($action == 'del_order')
 2 {
 3 
 4     $order_id = isset($_REQUEST['order_id']) ? intval($_REQUEST['order_id']) : 0;
 5     if ($order_id == 0)
 6     {
 7         $err -> show($_LANG['booking_list_lnk'], 'user.php?act=booking_list');
 8     }
 9 
10     if ($user_id == 0)
11     {
12         /* 用户没有登录 */
13         $err -> show($_LANG['booking_list_lnk'], 'user.php?act=booking_list');
14     }
15 
16     /* 检查订单是否属于该用户 */
17     $order_user = $db->getOne("SELECT user_id FROM " .$ecs->table('order_info'). " WHERE order_id = '$order_id'");
18     if (empty($order_user))
19     {
20         $err -> show($_LANG['booking_list_lnk'], 'user.php?act=booking_list');
21     }
22     else
23     {
24         if ($order_user != $user_id)
25         {
26             $err -> show($_LANG['booking_list_lnk'], 'user.php?act=booking_list');
27         }
28     }
29 
30     /* 删除订单 */
31     $sql = "delete i,g,a from " .$ecs->table('order_info'). " as i join " .$ecs->table('order_goods'). " as g on i.order_id = g.order_id join " .$ecs->table('order_action'). " as a on i.order_id = a.order_id where i.order_id = '$order_id'";
32     $message = $db->query($sql);
33 
34     if ($message === true)
35     {
36 
37         show_message('删除成功', $_LANG['back_booking_list'], 'user.php?act=order_list', 'info');
38 
39     }
40     else
41     {
42         $err -> show($_LANG['booking_list_lnk'], 'user.php?act=booking_list');
43     }
44 }