Online PHP editor | output for 4vfhq

<?php $input = [ [ 'date' => '2023-11-01', 'MinStay' => 1 ], [ 'date' => '2023-11-02', 'MinStay' => 1 ], [ 'date' => '2023-11-03', 'MinStay' => 1 ], [ 'date' => '2023-11-04', 'MinStay' => 2 ], [ 'date' => '2023-11-05', 'MinStay' => 2 ], [ 'date' => '2023-11-06', 'MinStay' => 2 ], [ 'date' => '2023-12-10', 'MinStay' => 1 ], [ 'date' => '2023-12-11', 'MinStay' => 1 ], [ 'date' => '2023-12-12', 'MinStay' => 3 ], [ 'date' => '2023-12-13', 'MinStay' => 2 ], [ 'date' => '2023-12-14', 'MinStay' => 2 ], [ 'date' => '2023-12-24', 'MinStay' => 2 ], // <-- added challenge where same minstay is not on contiguous date [ 'date' => '2024-01-01', 'MinStay' => 4 ], [ 'date' => '2024-01-02', 'MinStay' => 4 ], [ 'date' => '2024-01-03', 'MinStay' => 4 ], [ 'date' => '2024-01-04', 'MinStay' => 4 ], ]; $result = []; $lastMinStay = null; foreach ($input as ['date' => $d, 'MinStay' => $ms]) { if ($ms !== $lastMinStay || $d !== date('Y-m-d', strtotime("{$ref['dateTo']} +1 day"))) { unset($ref); $ref = ['dateFrom' => $d, 'dateTo' => $d, 'MinStay' => $ms]; $result[] =& $ref; $lastMinStay = $ms; continue; } $ref['dateTo'] = $d; } var_export($result);