Combine multidimential array columns by common value

I have the following array which represents a working schedule:

    Array
    (
        ...,
        [1] => Array
            (
                [TIME] => Array
                    (
                        [0] => Array
                            (
                                [FROM] => 10:00
                                [TO] => 20:00
                            )
                    )
                [DAYS] => Array
                    (
                        [0] => 5
                    )
            )
        [2] => Array
            (
                [TIME] => Array
                    (
                        [0] => Array
                            (
                                [FROM] => 22:00
                                [TO] => 00:00
                            )
                    )
                [DAYS] => Array
                    (
                        [0] => 5
                    )
            )
    )

What I would like to do is to combine (or merge?) array columns if DAYS key is common so the result would look like this:

    Array
    (
        ...,
        [1] => Array
            (
                [TIME] => Array
                    (
                        [0] => Array
                            (
                                [FROM] => 10:00
                                [TO] => 20:00
                            )
                        [1] => Array
                            (
                                [FROM] => 22:00
                                [TO] => 00:00
                            )
                    )
                [DAYS] => Array
                    (
                        [0] => 5
                    )
            )
    )

I used to try array_merge() and array_combine() functions but they didn’t work as I thought they should.

Will appreciate any help!

>Solution :

So something i tried with your given input and output, assuming Days just has one value, correct?

$schedules = 
[
    [
        'TIME' => 
            [
                [
                    "FROM" => "10:00",
                    "TO" => "20:00"
                ]
            ],
        'DAYS' => [5]
    ],
    [
        'TIME' => 
            [
                [
                    "FROM" => "22:00",
                    "TO" => "00:00"
                ]
            ],
        'DAYS' => [5]
    ]
];
$hashmap = [];
foreach ($schedules as $schedule) {
    $days = $schedule['DAYS'][0];
    if (!isset($hashmap[$days])) {
        $hashmap[$days] = $schedule;
    } else {
        $hashmap[$days]['TIME'] = array_merge($hashmap[$days]['TIME'], $schedule['TIME']);
    }
}
$hashmap = array_values($hashmap);

Hope this helps