具有NOT关联数组的PHP多维数组

Question

我现在搜索时间更长，找不到像我猜的那样合适。

我相信这个问题肯定有问题，但我真的无法找到它:(

我有这个无关联数组，我想按给定的时间戳

对它进行排序

[data] => Array
    (
        [0] => Array
            (
                [0] => 1415228400000 //sort by this value
                [1] => 9826.5
            )

        [1] => Array
            (
                [0] => 1415401200000
                [1] => 29197.95
            )

        [2] => Array
            (
                [0] => 1417561200000
                [1] => 3916.35
            )

        [3] => Array
            (
                [0] => 1415142000000
                [1] => 22120
            )

        [4] => Array
            (
                [0] => 1414796400000
                [1] => 28345.35
            )

        [5] => Array
            (
                [0] => 1420412400000
                [1] => 858
            )

        [6] => Array
            (
                [0] => 1423004400000
                [1] => 132
            )

        [7] => Array
            (
                [0] => 1423522800000
                [1] => 0
            )

        [8] => Array
            (
                [0] => 1424214000000
                [1] => 231
            )

        [9] => Array
            (
                [0] => 1425510000000
                [1] => 123.45
            )

        [10] => Array
            (
                [0] => 1425596400000
                [1] => 2223.45
            )

    )

问题是，我必须在第三维中对其进行排序，我该怎么做？