About the use of the date and time processing package Carbon in Laravel

<?php
namespace Carbon;
 
class Carbon extends \DateTime
{
 // code here
}

composer require nesbot/carbon

use Carbon\Carbon;

<?php
echo Carbon::now(); //2016-10-14 20:21:20
?>

// 直接使用字符串
echo Carbon::now('Europe/London'); //2016-10-14 20:21:20
// 或者
echo Carbon::now(new DateTimeZone('Europe/London'));

echo Carbon::now();        // 2016-10-14 15:18:34
echo Carbon::today();       // 2016-10-14 00:00:00
echo Carbon::tomorrow('Europe/London');       // 2016-10-14 00:00:00
echo Carbon::yesterday();       // 2016-10-14 00:00:00

Carbon {#179 ▼
 +"date": "2016-06-14 00:00:00.000000"
 +"timezone_type": 3
 +"timezone": "UTC"
}

echo Carbon::today()->toDateTimeString();
echo Carbon::yesterday()->toDateTimeString();
echo Carbon::tomorrow()->toDateTimeString();

echo Carbon::now()->toDateString(); //2016-10-14
echo Carbon::now()->toDateTimeString(); //2016-10-14 20:22:50

echo Carbon::parse('2016-10-15')->toDateTimeString(); //2016-10-15 00:00:00
echo Carbon::parse('2016-10-15')->toDateTimeString(); //2016-10-15 00:00:00
echo Carbon::parse('2016-10-15 00:10:25')->toDateTimeString(); //2016-10-15 00:10:25
 
echo Carbon::parse('today')->toDateTimeString(); //2016-10-15 00:00:00
echo Carbon::parse('yesterday')->toDateTimeString(); //2016-10-14 00:00:00
echo Carbon::parse('tomorrow')->toDateTimeString(); //2016-10-16 00:00:00
echo Carbon::parse('2 days ago')->toDateTimeString(); //2016-10-13 20:49:53
echo Carbon::parse('+3 days')->toDateTimeString(); //2016-10-18 20:49:53
echo Carbon::parse('+2 weeks')->toDateTimeString(); //2016-10-29 20:49:53
echo Carbon::parse('+4 months')->toDateTimeString(); //2017-02-15 20:49:53
echo Carbon::parse('-1 year')->toDateTimeString(); //2015-10-15 20:49:53
echo Carbon::parse('next wednesday')->toDateTimeString(); //2016-10-19 00:00:00
echo Carbon::parse('last friday')->toDateTimeString(); //2016-10-14 00:00:00

$year = '2015';
$month = '04';
$day = '12';
 
echo Carbon::createFromDate($year, $month, $day); //2015-04-12 20:55:59
 
$hour = '02';
$minute = '15':
$second = '30';
 
echo Carbon::create($year, $month, $day, $hour, $minute, $second); //2015-04-12 02:15:30
 
echo Carbon::createFromDate(null, 12, 25); // 年默认为当前年份

echo Carbon::now()->addDays(25); //2016-11-09 14:00:01
echo Carbon::now()->addWeeks(3); //2016-11-05 14:00:01
echo Carbon::now()->addHours(25); //2016-10-16 15:00:01
echo Carbon::now()->subHours(2); //2016-10-15 12:00:01
echo Carbon::now()->addHours(2)->addMinutes(12); //2016-10-15 16:12:01
echo Carbon::now()->modify('+15 days'); //2016-10-30 14:00:01
echo Carbon::now()->modify('-2 days'); //2016-10-13 14:00:01

echo Carbon::now()->tzName;            // America/Toronto
$first = Carbon::create(2012, 9, 5, 23, 26, 11);
$second = Carbon::create(2012, 9, 5, 20, 26, 11, 'America/Vancouver');
 
echo $first->toDateTimeString();          // 2012-09-05 23:26:11
echo $first->tzName;                // America/Toronto
echo $second->toDateTimeString();         // 2012-09-05 20:26:11
echo $second->tzName;               // America/Vancouver
 
var_dump($first->eq($second));           // bool(true)
var_dump($first->ne($second));           // bool(false)
var_dump($first->gt($second));           // bool(false)
var_dump($first->gte($second));          // bool(true)
var_dump($first->lt($second));           // bool(false)
var_dump($first->lte($second));          // bool(true)
 
$first->setDateTime(2012, 1, 1, 0, 0, 0);
$second->setDateTime(2012, 1, 1, 0, 0, 0);     // Remember tz is 'America/Vancouver'
 
var_dump($first->eq($second));           // bool(false)
var_dump($first->ne($second));           // bool(true)
var_dump($first->gt($second));           // bool(false)
var_dump($first->gte($second));          // bool(false)
var_dump($first->lt($second));           // bool(true)
var_dump($first->lte($second));          // bool(true)

$first = Carbon::create(2012, 9, 5, 1);
$second = Carbon::create(2012, 9, 5, 5);
var_dump(Carbon::create(2012, 9, 5, 3)->between($first, $second));     // bool(true)
var_dump(Carbon::create(2012, 9, 5, 5)->between($first, $second));     // bool(true)
var_dump(Carbon::create(2012, 9, 5, 5)->between($first, $second, false));  // bool(false)

$dt = Carbon::now();
 
$dt->isWeekday();
$dt->isWeekend();
$dt->isYesterday();
$dt->isToday();
$dt->isTomorrow();
$dt->isFuture();
$dt->isPast();
$dt->isLeapYear();
$dt->isSameDay(Carbon::now());
$born = Carbon::createFromDate(1987, 4, 23);
$noCake = Carbon::createFromDate(2014, 9, 26);
$yesCake = Carbon::createFromDate(2014, 4, 23);
$overTheHill = Carbon::now()->subYears(50);
var_dump($born->isBirthday($noCake));       // bool(false)
var_dump($born->isBirthday($yesCake));       // bool(true)
var_dump($overTheHill->isBirthday());       // bool(true) -> default compare it to today!

echo Carbon::now()->subDays(5)->diffForHumans();        // 5天前
 
echo Carbon::now()->diffForHumans(Carbon::now()->subYear());  // 1年后
 
$dt = Carbon::createFromDate(2011, 8, 1);
 
echo $dt->diffForHumans($dt->copy()->addMonth());       // 1月前
echo $dt->diffForHumans($dt->copy()->subMonth());       // 11月后
 
echo Carbon::now()->addSeconds(5)->diffForHumans();      // 5秒距现在
 
echo Carbon::now()->subDays(24)->diffForHumans();       // 3周前
echo Carbon::now()->subDays(24)->diffForHumans(null, true);  // 3周

public function boot()
{
  \Carbon\Carbon::setLocale('zh');
}

$article->created_at->diffForHumans();