Online PHP editor | output for Xr54K

<?php $jobs = [ [ 'id' => 9, 'needed_at' => '2023-02-26 03:31:04', 'ended_at' => '2023-02-26 04:31:04', 'add' => 20 ], [ 'id' => 6, 'needed_at' => '2023-02-26 04:51:04', 'ended_at' => '2023-02-26 05:51:04', 'add' => 30 ], [ 'id' => 7, 'needed_at' => '2023-02-26 09:21:04', 'ended_at' => '2023-02-26 10:21:04', 'add' => 30 ] ]; $format = 'Y-m-d H:i:s'; foreach ($jobs as &$row) { $dt ??= new DateTime($row['needed_at']); $row['needed_at'] = $dt->format($format); $dt->modify('+ 60 minutes'); $row['ended_at'] = $dt->format($format); $dt->modify("+ {$row['add']} minutes"); } var_export($jobs);