PHP如何使用日期时间类Carbon

use Carbon\Carbon; $today = new Carbon('2018-08-01');

$first_day = new Carbon('first day of this month'); $first_day = new Carbon('first day of last month'); return $month->format('Y-m'); // 2018-08

echo Carbon::today()->toDateString();// 2018-09-10

Carbon::yesterday()->toDateString();

Carbon::now(); // 2018-10-08 14:24:15.074542 Asia/Shanghai (+08:00) echo Carbon::now(); // 2018-10-08 14:28:10

$start = new Carbon('2018-10-04 15:00:03'); $end = new Carbon('2018-10-05 17:00:09'); $start->diff($end)->format('%H:%I:%S'); 02:00:06

>>> Carbon::parse('today 8am'); => Carbon\Carbon @1563148800 {#3955 date: 2019-07-15 08:00:00.0 Asia/Shanghai (+08:00), } >>> Carbon::parse('yesterday 6pm'); => Carbon\Carbon @1563098400 {#3954 date: 2019-07-14 18:00:00.0 Asia/Shanghai (+08:00), }

$orders = Order::whereDate('created_at', Carbon::today())->get();

date("Ymd", strtotime("+7 day")); // "20190716" date("Ymd", strtotime("-7 day"));