Online PHP editor | refs for AjUIH

<?php //$tz = new DateTimeZone('Europe/Amsterdam'); foreach (DateTimeZone::listIdentifiers() as $tz) { $now = new DateTime('2015-10-01', $tz); $then = new DateTime('2015-01-01', $tz); $diff = $now->diff($then); echo sprintf("Expected: %d. Returned: %d\n", 9, $diff->format('%m')); $now = new DateTime('2015-09-01', $tz); $then = new DateTime('2015-01-01', $tz); $diff = $now->diff($then); echo sprintf("Expected: %d. Returned: %d\n", 8, $diff->format('%m')); $now = new DateTime('2015-11-01', $tz); $then = new DateTime('2015-01-01', $tz); $diff = $now->diff($then); echo sprintf("Expected: %d. Returned: %d\n", 10, $diff->format('%m')); }