使用php在mongodb中搜索记录

Question

我使用mongodb的find（）函数以下列格式从集合中获取记录

Array
(
    [_id] => MongoId Object
        (
            [$id] => 52a9b86578e9288a378b4567
        )

[0] => Array
    (
        [senderID] => 1
        [followingID] => 15
        [type] => TW
    )

[1] => Array
    (
        [senderID] => 1
        [followingID] => 16
        [type] => TW
    )

[2] => Array
    (
        [senderID] => 1
        [followingID] => 17
        [type] => TW
    )

 [3] => Array
    (
        [senderID] => 2
        [followingID] => 17
        [type] => TW
    )

）

现在我想要所有发送ID为2的记录。我试过在find函数中传递数组

$myarray("senderID"=> 1)
$collection->find($myarray)

但它无法获得正确的记录。