Online PHP editor | output for 233hp

<?php date_default_timezone_set('Europe/Madrid'); $start = new DateTime('2017-03-26 01:59:00'); $increments = array( '+60 minutes' => '2017-03-26 03:59:00', '+61 minutes' => '2017-03-26 04:00:00', ); echo 'Start: ' . $start->format('r') . PHP_EOL; $local = $start->getTimezone(); $utc = new DateTimeZone('UTC'); foreach ($increments as $increment => $expected_string) { echo '>>> ' . $increment . PHP_EOL; $expected_end = new DateTime($expected_string); $actual_end = clone $start; $actual_end->setTimezone($utc); $actual_end->modify($increment); $actual_end->setTimezone($local); echo 'Expected end: ' . $expected_end->format('r') . PHP_EOL; echo 'Actual end: ' . $actual_end->format('r') . PHP_EOL; echo ($expected_end->format('c')===$actual_end->format('c') ? 'OK' : 'ERROR') . PHP_EOL; echo PHP_EOL; }