How to iterate over arrays and then merge them into one?

Question

Laravel

Hello everyone, please tell me how to sort through the arrays and then combine them into one?

now I have like this .. but only one array is displayed

$firstDate = $this->allParties()->pluck('party_day_from')->toArray();
        $allDateParty = $this->allParties()->toArray();
        $quantityParty = count($allDateParty);

        $arrAllParty = [];

        for ($i = 0; $i <= $quantityParty; $i++) {
            $partyDayFrom = Arr::get($allDateParty, ''.$i.'.party_day_from');
            $partyDayBefore = Arr::get($allDateParty, ''.$i.'.party_day_before');

            $countDiffDay = $this->diffDate($partyDayFrom, $partyDayBefore);
            $rows = array($partyDayFrom);
            $addDay = $partyDayFrom;

            for ($i = 1; $i <= $countDiffDay; $i++){
                $addDay = date('Y-m-d', strtotime($addDay. ' + 1 days'));

                array_push($rows, $addDay);
            }

            array_shift($rows);
        }
        array_push($arrAllParty, $rows);

this is what my code outputs, does not add the remaining arrays to the final array

Answer 1

For each date, join two strings separated by a space and feed into Carbon::parse:

$dayPart = '2018-10-26';
$timePart = '04:00:00';
$date = Carbon::parse("$dayPart $timePart");

And in general it is impossible to give dates normally? This is not a standard, this is some kind of game.