Online PHP editor | refs for NLoiE

<?php // Works $date = new DateTime('2013-12-27', new DateTimeZone('GMT')); var_dump($date); var_dump($date->modify('+1 day')); // Doesn't work $date = new DateTime('2013-12-27', new DateTimeZone('GMT')); var_dump($date); var_dump($date->modify('-1 weekday'));