I was searching longer now and can't find some suitable like I guess.
I am sure the question must have an answere somewere here but I really can't find it :(
I have this none associative array and I want to sort it by the given timestamp
[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
            )
    )
The thing is, I have to sort it in the third dimension, how can I do this?
