如何修改mongo数组中指定数组里的值

小花鱼

mongo数组如下：

PHP复制代码

 
array (
  '_id' => new MongoId("5281d8fa942a88200e000000"),
  'uid' => new MongoInt32(3000001),
  'cardsBag' =>
  array (
    '0' =>
    array (
      'id' => new MongoInt32(3),
      'count' => new MongoInt32(1),
      'fightIndex' => new MongoInt32(6),
      'property' =>
      array (
        '0' => new MongoInt32(99),
        '1' => new MongoInt32(321),
      ),
    ),
    '1' =>
    array (
      'id' => new MongoInt32(110),
      'count' => new MongoInt32(1),
      'fightIndex' => new MongoInt32(1),
      'property' =>
      array (
        '0' => new MongoInt32(99),
        '1' => new MongoInt32(123),
      ),
    ),
    '2' =>
    array (
      'id' => new MongoInt32(98),
      'count' => new MongoInt32(1),
      'fightIndex' => new MongoInt32(-1),
      'property' =>
      array (
        '0' => new MongoInt32(99),
        '1' => new MongoInt32(234),
      ),
    ),
    '3' =>
    array (
      'id' => new MongoInt32(96),
      'count' => new MongoInt32(1),
      'fightIndex' => new MongoInt32(0),
      'property' =>
      array (
        '0' => new MongoInt32(99),
        '1' => new MongoInt32(432),
      ),
    ),
),)

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我想更改这个数组里的cardsBag里的第二个数组里面的值。update 要怎么写呢？