Online PHP editor | refs for ritN8

<?php $testCases = [ ['2017-06-30 15:00:00', '2017-06-30 15:01:00'], ['2017-06-30 15:00:00', '2017-06-30 15:15:00'], ['2017-06-30 15:00:00', '2017-06-30 15:16:34'], ['2017-06-30 15:00:00', '2017-07-01 12:48:34'], ['2017-06-30 16:18:45', '2017-07-01 11:54:34'], ]; foreach ($testCases as $test) { list($inicio, $encerramento) = $test; $inicio = DateTime::createFromFormat('Y-m-d H:i:s', $inicio); $encerramento = DateTime::createFromFormat('Y-m-d H:i:s', $encerramento); $duracao = $inicio->diff($encerramento, true); var_dump($duracao); var_dump(join(':', [ str_pad($duracao->days*24 + $duracao->h, 2, STR_PAD_RIGHT, '0'), str_pad($duracao->i, 2, STR_PAD_RIGHT, '0'), str_pad($duracao->s, 2, STR_PAD_RIGHT, '0'), ])); }