Online PHP editor | output for jMvCP

<?php $datetimes = [ "items" => [ [ "id" => 1, "start_date" => "2019-09-26", "start_time" => "07:00:00", "end_date" => "2019-09-26", "end_time" => "09:00:00" ], [ "id" => 4, "start_date" => "2019-09-26", "start_time" => "12:00:00", "end_date" => "2019-09-26", "end_time" => "14:00:00" ], [ "id" => 9, "start_date" => "2019-09-26", "start_time" => "16:00:00", "end_date" => "2019-09-26", "end_time" => "17:00:00" ], [ "id" => 13, "start_date" => "2019-09-26", "start_time" => "19:00:00", "end_date" => "2019-09-26", "end_time" => "20:00:00" ], [ "id" => 2, "start_date" => "2019-09-27", "start_time" => "07:00:00", "end_date" => "2019-09-27", "end_time" => "08:00:00" ], [ "id" => 5, "start_date" => "2019-09-27", "start_time" => "12:00:00", "end_date" => "2019-09-27", "end_time" => "14:00:00" ], [ "id" => 10, "start_date" => "2019-09-27", "start_time" => "16:00:00", "end_date" => "2019-09-27", "end_time" => "18:00:00" ], [ "id" => 14, "start_date" => "2019-09-27", "start_time" => "19:00:00", "end_date" => "2019-09-27", "end_time" => "20:00:00" ], [ "id" => 3, "start_date" => "2019-09-28", "start_time" => "07:00:00", "end_date" => "2019-09-28", "end_time" => "10:00:00" ], [ "id" => 6, "start_date" => "2019-09-28", "start_time" => "12:00:00", "end_date" => "2019-09-28", "end_time" => "13:00:00" ], [ "id" => 11, "start_date" => "2019-09-28", "start_time" => "16:00:00", "end_date" => "2019-09-28", "end_time" => "17:00:00" ], [ "id" => 15, "start_date" => "2019-09-28", "start_time" => "19:00:00", "end_date" => "2019-09-28", "end_time" => "20:00:00" ] ] ]; $openinghours = []; function openinghours($times) { global $openinghours; $openinghours[$times["start_date"]][] = $times["start_time"]; $openinghours[$times["start_date"]][] = $times["end_time"]; sort($openinghours[$times["start_date"]]); } array_map("openinghours", $datetimes["items"]); var_dump($openinghours); foreach($openinghours as $date => $times) { echo "{$date} : {$times[0]} - " . end($times) . "\n"; }