在MySQL查询的where子句中使用数组

Question

我正在尝试在MySQL查询的where子句中使用数组，但查询未正确显示发布的数组。

我发布阵列，控制台显示：

[RoomOverrideRoomSelect] => Array
(
[0] => 1
[1] => 2
[2] => 3
)

然后我像这样处理数组：

$MultiRoomID = $_POST['RoomOverrideRoomSelect'];
$arr_Rooms = array($MultiRoomID);
$str_Rooms=implode(",", $arr_Rooms);

我的查询：

"SELECT 
RecordID, ConfRoomID, ConfRoomName   
FROM ConfRooms2017 
WHERE HotelID = '". $_SESSION['hotelid']. "' 
AND ConfRoomID IN ('$str_Rooms')";

如果我回显查询，我将得到：

SELECT 
RecordID, ConfRoomID, ConfRoomName   
FROM ConfRooms2017 
WHERE HotelID = 'EXBHX' 
AND ConfRoomID IN ('Array')

应该是：

SELECT 
RecordID, ConfRoomID, ConfRoomName   
FROM ConfRooms2017 
WHERE HotelID = 'EXBHX' 
AND ConfRoomID IN (1,2,3)

谁能看到我要去哪里错了？