I have a multidimensional array which I need to be sorted with uniqueness as I have duplicated records, so I need `array_unique` to go through the array and remove duplicates by the value, e.g.

```
Array
(
    [0] => Array
        (
            [id] => 324
            [time_start] => 1301612580
            [level] => 0.002
            [input_level] => 0.002
        )

    [1] => Array
        (
            [id] => 325
            [time_start] => 1301612580
            [level] => 0.002
            [input_level] => 0.002
        )

    [2] => Array
        (
            [id] => 326
            [time_start] => 1301612580
            [level] => 0.002
            [input_level] => 0.002
        )
)

```

There are duplicated `time_start`, which they are all the same, also `level` and `input_level` but they are not to be affected, only if there are matching `time_start` it should remove it and process the whole array *(the array is bigger than you think, but I just posted a small example of the array)*. Should remove dupes and return like this:

```
Array
(
    [0] => Array
        (
            [id] => 324
            [time_start] => 1301612580
            [level] => 0.002
            [input_level] => 0.002
        )
)

```

Questions I've found that didn't work:

* [reformat multidimensional array based on value](https://stackoverflow.com/questions/5405547/reformat-multidimensional-array-based-on-value)
* [Delete element from multidimensional-array based on value](https://stackoverflow.com/questions/4466159/delete-element-from-multidimensional-array-based-on-value)