php 日期相关的类 DateInterval DateTimeZone DatePeriod

<?php/** * Created by PhpStorm. * User: Mch * Date: 7/18/18 * Time: 21:30 */$datetime = new DateTime(‘2018-07-18 21:30:00‘);// +2 weeks$interval = new DateInterval(‘P2W‘);$datetime->add($interval);echo $datetime->format(‘Y-m-d H:i:s‘).PHP_EOL;// + 1month$datetime->add( ???new DateInterval(‘P1M‘));echo $datetime->format(‘Y-m-d H:i:s‘).PHP_EOL;// -1month -2weeks$datetime->add( ???\DateInterval::createFromDateString("-1 month -2 weeks"));echo $datetime->format(‘Y-m-d H:i:s‘).PHP_EOL;echo ‘------------------‘,PHP_EOL;// start, interval, recurrences$datePeriod = new \DatePeriod( ???$datetime, ???\DateInterval::createFromDateString(‘-1 day‘), ???3);foreach ($datePeriod as $date) { ???echo $date->format(‘Y-m-d‘),PHP_EOL;}

<?php/** * Created by PhpStorm. * User: Mch * Date: 7/18/18 * Time: 21:42 */$timezone = new DateTimeZone(‘Asia/Tokyo‘);$datetime = new \DateTime(‘2018-07-18 22:42:00‘, $timezone);$datetime->setTimezone( ???new DateTimeZone(‘Asia/Shanghai‘));echo $datetime->format(‘Y-m-d H:i:s‘).PHP_EOL;// 2018-07-18 21:42:00

<?php/** * Created by PhpStorm. * User: Mch * Date: 7/18/18 * Time: 21:51 */$start = new DateTime();// $interval = new DateInterval(‘P2W‘);$interval = new DateInterval(‘P1D‘);$period = new DatePeriod( ???$start, ???$interval, ???3, ???DatePeriod::EXCLUDE_START_DATE);foreach ($period as $nextDateTime) { ???echo $nextDateTime->format(‘Y-m-d H:i:s‘),PHP_EOL;}/**2018-07-19 15:54:202018-07-20 15:54:202018-07-21 15:54:20 */