Laravel Carbon 扩展包中文详解

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2022-07-18
标签   Laravel基础

Introduction

Carbon *继承了PHP的 *Datetime *类和JsonSerialiable。所以 *Carbon *中没有涉及到的,但在 *Datetime *和JsonSerializable*中已经实现的方法都是可以使用的。

class  Carbon  extends  DateTime  implements  JsonSerializable
{
 //code here
}

Carbon 类声明在 Carbon 命名空间下,可以通过引入命名空间的方式来代替每次输入完整的类名。

 <?php 
 use  Carbon\Carbon;

要特别留意是否使用了正确的时区,比如的所有差异比较都使用或者系统设定的时区

 $dtToronto =  Carbon::create(2012,  1,  1,  0,  0,  0,  'America/Toronto');
 $dtVancouver =  Carbon::create(2012,  1,  1,  0,  0,  0,  'America/Vancouver');
 echo $dtVancouver->diffInHours($dtToronto);  //

以上进行的时间比较是在提供的 Carbon 实例所在的时区下完成的。例如作者所在的时区为 东京时间减13 小时,因此在下午一点后。Carbon::now(‘Asia/Tokyo’)->isToday() 将会返回 false ,如果在调用 now() 时设置时区为东京时区,接下来的操作都使用东京时区是说不过去的。所以在与 *now() *创建的实例进行比较时,默认是在当前时区下完成的。

Instantiation

有几种不同的方法可以创建一个新的Carbon实例。首先是构造函数。它覆盖父构造函数,您最好阅读PHP手册中的第一个参数,并了解它所接受的日期/时间字符串格式。您可能会发现自己很少使用构造函数,而是依赖于显式静态方法来提高可读性

 $carbon =  new  Carbon();  // 等同于 Carbon::now()  
 $carbon =  new  Carbon('first day of January 2008',  'America/Vancouver');
 echo get_class($carbon);  // 'Carbon\Carbon'  
 $carbon =  Carbon::now(-5);//1表示英国伦敦,2表示法国巴黎

您将在上面注意到,timezone(2nd)参数是作为字符串和整数而不是\DateTimeZone实例传递的。所有DateTimeZone参数都已被增强,因此您可以将一个DateTimeZone实例、字符串或整型偏移量传递给GMT,并为您创建时区。在下一个示例中再次显示了这一点,该示例还介绍了now()函数。

  $nowInLondonTz =  Carbon::now(new \DateTimeZone('Europe/London'));
  // 或者以字符串形式只传时区 
  $nowInLondonTz =  Carbon::now('Europe/London');
// 或者在DST期间创建一个时区为+1到GMT的日期,然后传递一个整数
echo Carbon::now(1)->tzName;  // Europe/London

如果您真的喜欢您的动态方法调用,并且对使用构造函数时所需的额外的行或难看的括号感到失望,那么您将喜欢parse方法。

 echo (new  Carbon('first day of December 2008'))->addWeeks(2);  // 2008-12-15 00:00:00 
 echo Carbon::parse('first day of December 2008')->addWeeks(2);  // 2008-12-15 00:00:00

NOTE*:PHP 5.4* 之前(new MyClass())->method()会报语法错误**, 如果你使用**PHP 5.3, 你需要创建一个变量然后再调用方法:

  $date =  new  Carbon('first day of December 2008');  
  echo $date->addWeeks(2);

传递给Carbon:::parsenew Carbon的字符串可以表示相对时间(next sunday, tomorrow, first day of next month, last year)或绝对时间(first day of December 2008, 2017-01-06)。您可以用Carbon::hasRelativeKeywords()测试一个字符串是否会产生一个相对或绝对日期。

  $string =  'first day of next month';
  if  (strtotime($string)  ===  false)  {
     echo "'$string' is not a valid date/time string.";
  } elseif (Carbon::hasRelativeKeywords($string))  {
     echo "'$string' is a relative valid date/time string, it will returns different dates depending on the current date.";
  }  else  {
    echo "'$string' is an absolute date/time string, it will always returns the same date.";
  }

为了配合now(),还存在一些静态的实例化助手来创建广为人知的实例。这里唯一需要注意的是,today()tomorrow()yesterday()除了按照预期的行为,都接受一个时区参数,每个参数的时间值都设置为00:00:00。

 $now =  Carbon::now();
 echo $now;  // 2018-07-26 16:25:49 
 $today =  Carbon::today();
 echo $today;  // 2018-07-26 00:00:00 
 $tomorrow =  Carbon::tomorrow('Europe/London');
 echo $tomorrow;  // 2018-07-27 00:00:00 
 $yesterday =  Carbon::yesterday();
 echo $yesterday;  // 2018-07-25 00:00:00

下一组静态助手是createXXX() 函数。大多数静态create函数允许您提供许多个或少量的参数,并为所有其他参数提供默认值。通常默认值是当前日期、时间或时区。更高的值将适当地包装,但无效的值将抛出一个InvalidArgumentException,并附带一条信息。错误消息从DateTime:::getLastErrors()调用中获取。

 Carbon::createFromDate($year, $month, $day, $tz);
 Carbon::createFromTime($hour, $minute, $second, $tz);
 Carbon::createFromTimeString("$hour:$minute:$second", $tz);
 Carbon::create($year, $month, $day, $hour, $minute, $second, $tz);

createFromDate() 的默认值是当前时间. createFromTime() 默认值是今天. create()如果不传参数也是当前时间. 与前面一样,$tz默认设置为当前时区,否则可以是DateTimeZone实例,也可以是字符串时区值。默认值(模拟底层PHP库)的唯一特殊情况发生在指定了小时值但没有分钟或秒时,它们将默认为0。

注:***createFromTime()** will default the date to today**。小编经实战代码打印出来发现**createFromTime()**的默认值也是当前时间,不是今天(时分秒并不是**00:00:00**)。***

$xmasThisYear =  Carbon::createFromDate(null,  12,  25);  // Year默认值是今年
$Y2K =  Carbon::create(2000,  1,  1,  0,  0,  0);  // 等价于Carbon::createMidnightDate(2000, 1, 1)
$alsoY2K =  Carbon::create(1999,  12,  31,  24);
$noonLondonTz =  Carbon::createFromTime(12,  0,  0,  'Europe/London');
$teaTime =  Carbon::createFromTimeString('17:00:00',  'Europe/London');
 // A two digit minute could not be found
try  {  
   Carbon::create(1975,  5,  21,  22,  -2,  0);  
}  catch(\InvalidArgumentException $x)  { 
   echo $x->getMessage()
}

创建异常发生在使用负值上,而不是在溢出上,要获取溢出上的异常,请使用createSafe()

echo Carbon::create(2000,  1,  35,  13,  0,  0);// 2000-02-04 13:00:00 
//(1月有31天,4天自动加上去转换成了2月4号) 
try  {
  Carbon::createSafe(2000,  1,  35,  13,  0,  0);
}  catch  (\Carbon\Exceptions\InvalidDateException $exp)  {
  echo $exp->getMessage();
}
// 会报错:day : 35 is not a valid value.

NOTE1:2018-02-29会产生一个异常,而2020-02-29不会产生异常,因为2020年是闰年。

NOTE2:Carbon::createSafe(2014,3,30,1,30,0,’Europe/London’);从PHP 5.4开始也会产生一个异常,因为在夏令时跳过一个小时,但是在PHP 5.4之前,它只会创建这个无效的日期。

 Carbon::createFromFormat($format, $time, $tz);

createFromFormat()是最基本的php函数DateTime:::createFromFormat的包装器。不同的是,$tz参数可以是DateTimeZone实例或字符串时区值。此外,如果格式有错误,这个函数将调用DateTime::getLastErrors()方法,然后抛出一个InvalidArgumentException,错误作为消息。如果您查看上面的createXX()函数的源代码,它们都会调用createFromFormat()。

 echo Carbon::createFromFormat('Y-m-d H',  '1975-05-21 22')->toDateTimeString();  // 1975-05-21 22:00:00

最后三个create函数用于使用unix时间戳。第一个将创建一个与给定的时间戳相等的Carbon实例,并将设置时区或默认为当前时区。第二个createFromTimestampUTC()是不同的,因为时区将保持UTC(GMT)。第二种方法与Carbon: createFromFormat(‘@’.$timestamp)的作用相同,但我只是让它更明确了一点。第三个是createFromTimestampMs(),它接受以毫秒而不是秒为单位的时间戳。也允许使用负时间戳。

echo Carbon::createFromTimestamp(-1)->toDateTimeString();  // 1969-12-31 18:59:59
echo Carbon::createFromTimestamp(-1,  'Europe/London')->toDateTimeString();  // 1970-01-01 00:59:59
echo Carbon::createFromTimestampUTC(-1)->toDateTimeString();  // 1969-12-31 23:59:59
echo Carbon::createFromTimestampMs(1)->format('Y-m-d\TH:i:s.uP T');  // 1969-12-31T19:00:00.001000-05:00 EST
echo Carbon::createFromTimestampMs(1,  'Europe/London')->format('Y-m-d\TH:i:s.uP T');  // 1970-01-01T01:00:00.001000+01:00 BST

您还可以copy()在现有Carbon实例上创建。如预期的那样,日期、时间和时区值都被复制到新实例。

$dt =  Carbon::now();
echo $dt->diffInYears($dt->copy()->addYear());  // 1

// $dt 实例没有改变,任然是Carbon:now()

您可以在现有的Carbon实例上使用nowWithSameTz()来在相同的时区中获取一个新的实例。

 $meeting =  Carbon::createFromTime(19,  15,  00,  'Africa/Johannesburg');
// 19:15 in Johannesburg 
 echo 'Meeting starts at '.$meeting->format('H:i').' in Johannesburg.';  // Meeting starts at 19:15 in Johannesburg.
// now in Johannesburg 
 echo "It's ".$meeting->nowWithSameTz()->format('H:i').' right now in Johannesburg.';  // It's 09:37 right now in Johannesburg.

最后,如果您发现自己从另一个库继承了\DateTime实例,不要害怕!您可以通过友好的instance()方法创建一个Carbon实例。或者使用更灵活的方法make(),它可以从DateTimeCarbonstring返回一个新的Carbon实例,否则它只返回null。

 $dt =  new \DateTime('first day of January 2008');  // <== instance from another API  
 $carbon =  Carbon::instance($dt);
 echo get_class($carbon);  // 'Carbon\Carbon'  
 echo $carbon->toDateTimeString();  // 2008-01-01 00:00:00

关于微秒的简要说明。PHP DateTime对象允许您设置一个微秒值,但是忽略它的所有日期数学。现在,1.12.0的Carbon在实例化或复制操作过程中支持微秒,并在默认情况下使用format()方法。

$dt =  Carbon::parse('1975-05-21 22:23:00.123456');
echo $dt->micro;  //
echo $dt->copy()->micro;  //

在PHP 7.1之前 DateTime微秒未添加到“now”实例,并且之后不能更改,这意味着:

$date =  new  DateTime('now');
echo $date->format('u');
 // display current microtime in PHP >= 7.1 (expect a bug in PHP 7.1.3 only)
// display 000000 before PHP 7.1 
$date =  new  DateTime('2001-01-01T00:00:00.123456Z');
echo $date->format('u');
 // display 123456 in all PHP versions
$date->modify('00:00:00.987654');
echo $date->format('u');
// display 987654 in PHP >= 7.1
// display 123456 before PHP 7.1

为了解决这个限制,我们在PHP < 7.1中调用了microseconds,但是这个特性在需要时可以被禁用(PHP >= 7.1):

Carbon::useMicrosecondsFallback(false);
var_dump(Carbon::isMicrosecondsFallbackEnabled());  // false  
 echo Carbon::now()->micro;  // 0 in PHP < 7.1, microtime in PHP >= 7.1
Carbon::useMicrosecondsFallback(true);  // default value  
 var_dump(Carbon::isMicrosecondsFallbackEnabled());  // true
echo Carbon::now()->micro;  // microtime in all PHP version

是否需要遍历一些日期以找到最早或最近的日期?不知道如何设置初始最大值/最小值?现在有两个助手可以帮助你做出简单的决定:

 echo Carbon::maxValue();  // '9999-12-31 23:59:59'
echo Carbon::minValue();  // '0001-01-01 00:00:00'

最小和最大值主要取决于系统(32位或64位)。

使用32位OS系统或32位版本的PHP(您可以在PHP中使用PHP_INT_SIZE == 4来检查它),最小值是0-unix-timestamp(1970-01-01 00:00:00),最大值是常量PHP_INT_MAX给出的时间戳。

使用64位OS系统和64位PHP版本,最小值为01-01 00:00,最大值为9999-12-31 23:59:59。

Localization

不幸的是,基类DateTime没有任何本地化支持。为了开始本地化支持,还添加了一个formatLocalized($format)方法。实现使用当前实例时间戳对strftime进行调用。如果您首先使用PHP函数setlocale()设置当前的语言环境,那么返回的字符串将被格式化为正确的语言环境。

 $newLocale = setlocale(LC_TIME,  'German');
 if  ($newLocale ===  false)  {
   echo '"German" locale is not installed on your machine, it may have a different name a different name on your machine or you may need to install it.';
 }
echo $dt->formatLocalized('%A %d %B %Y');  // Mittwoch 21 Mai 1975
setlocale(LC_TIME,  'English');
echo $dt->formatLocalized('%A %d %B %Y');  // Wednesday 21 May 1975
setlocale(LC_TIME,  '');  // reset locale

diffForHumans()也被定位。您可以通过使用静态Carbon::setLocale()函数来设置Carbon locale(),并使用Carbon::getLocale()获取当前的设置。

Carbon::setLocale('de');
echo Carbon::getLocale();  // de
echo Carbon::now()->addYear()->diffForHumans();  // in 1 Jahr
Carbon::setLocale('en');
echo Carbon::getLocale();  // en

或者,您可以将一些代码与给定的语言环境隔离:

Carbon::executeWithLocale('de',  function  ($newLocale)  {
  // You can optionally get $newLocale as the first argument of the closure  
  // It will be set to the new locale or false if the locale was not found.  
  echo Carbon::now()->addYear()->diffForHumans();
});  // in 1 Jahr 
// outside the function the locale did not change 
echo Carbon::getLocale();  // en  
 // or same using a return statement
$french =  Carbon::executeWithLocale('fr',  function  ()  {
  return  Carbon::now()->addYear()->diffForHumans();
});
echo $french;  // dans 1 an

有些语言需要打印utf8编码(主要以. utf8结尾的语言环境包)。在本例中,您可以使用静态方法```php

Carbon::setUtf8()对对utf8字符集的formatlocalized()调用的结果进行编码。
setlocale(LC_TIME,  'Spanish');
$dt =  Carbon::create(2016,  01,  06,  00,  00,  00);
Carbon::setUtf8(false);
echo $dt->formatLocalized('%A %d %B %Y');  // mi�rcoles 06 enero 2016 
Carbon::setUtf8(true);
echo $dt->formatLocalized('%A %d %B %Y');  // miércoles 06 enero 2016 
Carbon::setUtf8(false);
setlocale(LC_TIME,  '');

在Linux上

如果您在翻译方面有问题,请检查系统中安装的地区(本地和生产)。

区域设置-列出已启用的区域设置。

sudo locale-gen fr_FR。UTF-8安装一个新的语言环境。

sudo dpkg-reconfigure locale来发布所有启用的locale。

并重启系统。

您可以通过以下方式自定义现有语言:

Carbon::setLocale('en');
$translator =  Carbon::getTranslator();
$translator->setMessages('en', array(
   'day'  =>  ':count boring day|:count boring days',
));
$date1 =  Carbon::create(2018,  1,  1,  0,  0,  0);
$date2 =  Carbon::create(2018,  1,  4,  4,  0,  0);
echo $date1->diffForHumans($date2,  true,  false,  2);  // 3 boring days 4 hours
$translator->resetMessages('en');  // reset language customizations for en language

请注意,您还可以使用另一个转换器Carbon::setTranslator($custom),只要给定的转换器继承了Symfony\Component\Translation\TranslatorInterface。 因此,对格式本地化、getter(如localeMonth、localedayayofweek和短变体)的语言环境支持是由安装在操作系统中的语言环境驱动的。对于其他翻译,由于碳社区的支持,它在内部得到了支持。您可以使用以下方法检查支持的内容:

echo implode(', ', array_slice(Carbon::getAvailableLocales(),  0,  3)).'...';  // af, ar, ar_Shakl...
// Support diff syntax (before, after, from now, ago)
var_dump(Carbon::localeHasDiffSyntax('en'));  // bool(true)
var_dump(Carbon::localeHasDiffSyntax('zh_TW'));  // bool(true) 
 // Support 1-day diff words (just now, yesterday, tomorrow)
var_dump(Carbon::localeHasDiffOneDayWords('en'));  // bool(true)
var_dump(Carbon::localeHasDiffOneDayWords('zh_TW'));  // bool(false) 
 // Support 2-days diff words (before yesterday, after tomorrow)
var_dump(Carbon::localeHasDiffTwoDayWords('en'));  // bool(true)
var_dump(Carbon::localeHasDiffTwoDayWords('zh_TW'));  // bool(false) 
 // Support short units (1y = 1 year, 1mo = 1 month, etc.)
var_dump(Carbon::localeHasShortUnits('en'));  // bool(true)
var_dump(Carbon::localeHasShortUnits('zh_TW'));  // bool(false)
// Support period syntax (X times, every X, from X, to X)
var_dump(Carbon::localeHasPeriodSyntax('en'));  // bool(true)
var_dump(Carbon::localeHasPeriodSyntax('zh_TW'));  // bool(false)

以下是最后一个碳版本支持的73个地区的概述:

注意,如果您使用Laravel 5.5+,语言环境将根据当前的最后一个App:setLocale execution自动设置。所以扩散人类将是透明的。您可能仍然需要在某些中间件中运行setlocale以使formatlocalizedworking正确。

Testing Aids

测试方法允许您在创建“现在”实例时设置要返回的Carbon实例(real或mock)。所提供的实例将在以下条件下具体返回:

static now()方法的调用,例如

:now()

当一个空(或空字符串)被传递给构造函数或parse()时,ex.new Carbon(空)

当字符串“now”传递给构造函数或parse()时,ex. new Carbon(‘now’)

给定的实例也将作为diff方法的默认相对时间。

$knownDate =  Carbon::create(2001,  5,  21,  12);  // create testing date
Carbon::setTestNow($knownDate);  // set the mock (of course this could be a real mock object)
echo Carbon::getTestNow();  // 2001-05-21 12:00:00
echo Carbon::now();  // 2001-05-21 12:00:00
echo new  Carbon();  // 2001-05-21 12:00:00
echo Carbon::parse();  // 2001-05-21 12:00:00
echo new  Carbon('now');  // 2001-05-21 12:00:00
echo Carbon::parse('now');  // 2001-05-21 12:00:00
echo Carbon::create(2001,  4,  21,  12)->diffForHumans();  // 1 month ago
var_dump(Carbon::hasTestNow());  // bool(true)
Carbon::setTestNow();  // clear the mock
var_dump(Carbon::hasTestNow());  // bool(false)
echo Carbon::now();  // 2018-07-05 03:37:12

一个更有意义的完整例子:

class  SeasonalProduct
{
    protected $price;
    public  function __construct($price)
    {
        $this->price = $price;
    }
    public  function getPrice()  {
    $multiplier =  1;
    if  (Carbon::now()->month ==  12)  {
        $multiplier =  2;
    }
    return $this->price * $multiplier;
    }
}
$product =  new  SeasonalProduct(100);
Carbon::setTestNow(Carbon::parse('first day of March 2000'));
echo $product->getPrice();  //
Carbon::setTestNow(Carbon::parse('first day of December 2000'));
echo $product->getPrice();  //
Carbon::setTestNow(Carbon::parse('first day of May 2000'));
echo $product->getPrice();  //
Carbon::setTestNow();

根据给定的“now”实例,还可以对相关短语进行嘲笑。

$knownDate =  Carbon::create(2001,  5,  21,  12);  // create testing date
Carbon::setTestNow($knownDate);  // set the mock
echo new  Carbon('tomorrow');  // 2001-05-22 00:00:00  ... notice the time !
echo new  Carbon('yesterday');  // 2001-05-20 00:00:00
echo new  Carbon('next wednesday');  // 2001-05-23 00:00:00
echo new  Carbon('last friday');  // 2001-05-18 00:00:00
echo new  Carbon('this thursday');  // 2001-05-24 00:00:00
Carbon::setTestNow();  // always clear it !

被认为是相对修饰语的单词列表如下:

+
-
ago
first
next
last
this
today
tomorrow
yesterday

请注意,与next()、previous()和modify()方法类似,这些相对修饰符中的一些将把时间设置为00:00

Carbon: parse($time$tz)和new Carbon($time$tz)都可以将时区作为第二个参数。

echo Carbon::parse('2012-9-5 23:26:11.223', 'Europe/Paris')->timezone->getName(); // Europe/Paris

Getters

getter方法是通过PHP的__get()方法实现的。这使您能够像访问属性而不是函数调用那样访问值。

$dt =  Carbon::parse('2012-10-5 23:26:11.123789');
// 这些getter方法都将返回int类型
var_dump($dt->year);  // int(2012)
var_dump($dt->month);  // int(10)
var_dump($dt->day);  // int(5)
var_dump($dt->hour);  // int(23)
var_dump($dt->minute);  // int(26)
var_dump($dt->second);  // int(11)
var_dump($dt->micro);  // int(123789)
// dayOfWeek 返回一个数值 0 (sunday) 到 6 (saturday)
var_dump($dt->dayOfWeek);  // int(5)
// dayOfWeekIso 返回一个数值 1 (monday) 到 7 (sunday)
var_dump($dt->dayOfWeekIso);  // int(5)
setlocale(LC_TIME,  'German');
var_dump($dt->englishDayOfWeek);  // string(6) "Friday"
var_dump($dt->shortEnglishDayOfWeek);  // string(3) "Fri"
var_dump($dt->localeDayOfWeek);  // string(7) "Freitag"
var_dump($dt->shortLocaleDayOfWeek);  // string(2) "Fr"
var_dump($dt->englishMonth);  // string(7) "October"
var_dump($dt->shortEnglishMonth);  // string(3) "Oct"
var_dump($dt->localeMonth);  // string(7) "Oktober"
var_dump($dt->shortLocaleMonth);  // string(3) "Okt"
setlocale(LC_TIME,  '');
var_dump($dt->dayOfYear);  // int(278)
var_dump($dt->weekNumberInMonth);
// weekNumberInMonth consider weeks from monday to sunday, so the week 1 will
// contain 1 day if the month start with a sunday, and up to 7 if it starts with a monday
var_dump($dt->weekOfMonth);  // int(1)
// weekOfMonth will returns 1 for the 7 first days of the month, then 2 from the 8th to
// the 14th, 3 from the 15th to the 21st, 4 from 22nd to 28th and 5 above
var_dump($dt->weekOfYear);  // int(40)
var_dump($dt->daysInMonth);  // int(31)
var_dump($dt->timestamp);  // int(1349493971)
var_dump(Carbon::createFromDate(1975,  5,  21)->age);  // int(43) calculated vs now in the same tz
var_dump($dt->quarter);  // int(4)
// Returns an int of seconds difference from UTC (+/- sign included)
var_dump(Carbon::createFromTimestampUTC(0)->offset);  // int(0)
var_dump(Carbon::createFromTimestamp(0)->offset);  // int(-18000)
// Returns an int of hours difference from UTC (+/- sign included)
var_dump(Carbon::createFromTimestamp(0)->offsetHours);  // int(-5)
// Indicates if day light savings time is on
var_dump(Carbon::createFromDate(2012,  1,  1)->dst);  // bool(false)
var_dump(Carbon::createFromDate(2012,  9,  1)->dst);  // bool(true)
// Indicates if the instance is in the same timezone as the local timezone
var_dump(Carbon::now()->local);  // bool(true)
var_dump(Carbon::now('America/Vancouver')->local);  // bool(false)
// Indicates if the instance is in the UTC timezone
var_dump(Carbon::now()->utc);  // bool(false)
var_dump(Carbon::now('Europe/London')->utc);  // bool(false)
var_dump(Carbon::createFromTimestampUTC(0)->utc);  // bool(true)
// Gets the DateTimeZone instance
echo get_class(Carbon::now()->timezone);  // DateTimeZone
echo get_class(Carbon::now()->tz);  // DateTimeZone
// Gets the DateTimeZone instance name, shortcut for ->timezone->getName()
echo Carbon::now()->timezoneName;  // America/Toronto
echo Carbon::now()->tzName;  // America/Toronto

Setters

下面的setter是通过PHP的__set()方法实现的。值得注意的是,除了显式地设置时区之外,任何设置程序都不会更改实例的时区。具体地说,设置时间戳不会将相应的时区设置为UTC。

$dt =  Carbon::now();
$dt->year =  1975;
$dt->month =  13;  //强制 year++ 然后 month = 1
$dt->month =  5;
$dt->day =  21;
$dt->hour =  22;
$dt->minute =  32;
$dt->second =  5;
$dt->timestamp =  169957925;  // 这不会改变时区
// 通过DateTimeZone实例或字符串设置时区 
$dt->timezone =  new  DateTimeZone('Europe/London');
$dt->timezone =  'Europe/London';
$dt->tz =  'Europe/London';

Fluent Setters

对于setter没有可选参数,但是函数定义中有足够的多样性,因此无论如何都不需要它们。值得注意的是,除了显式地设置时区之外,任何设置程序都不会更改实例的时区。具体地说,设置时间戳不会将相应的时区设置为UTC。

$dt =  Carbon::now();
$dt->year(1975)->month(5)->day(21)->hour(22)->minute(32)->second(5)->toDateTimeString();
$dt->setDate(1975,  5,  21)->setTime(22,  32,  5)->toDateTimeString();
$dt->setDate(1975,  5,  21)->setTimeFromTimeString('22:32:05')->toDateTimeString();
$dt->setDateTime(1975,  5,  21,  22,  32,  5)->toDateTimeString();
$dt->timestamp(169957925)->timezone('Europe/London');
$dt->tz('America/Toronto')->setTimezone('America/Vancouver');

您还可以将日期和时间与其他DateTime/Carbon对象分开设置:

$source1 =  new  Carbon('2010-05-16 22:40:10');
$dt =  new  Carbon('2001-01-01 01:01:01');
$dt->setTimeFrom($source1);
echo $dt;  // 2001-01-01 22:40:10
$source2 =  new  DateTime('2013-09-01 09:22:56');
$dt->setDateFrom($source2);
echo $dt;  // 2013-09-01 22:40:10

IsSet

实现了PHP函数isset()。这是在一些外部系统(例如Twig)在使用属性之前验证属性的存在时完成的。这是使用isset()或empty()方法完成的。在PHP站点:isset()、isset()、empty()上,您可以阅读更多关于这些内容的信息。

var_dump(isset(Carbon::now()->iDoNotExist));  // bool(false)
var_dump(isset(Carbon::now()->hour));  // bool(true)
var_dump(empty(Carbon::now()->iDoNotExist));  // bool(true)
var_dump(empty(Carbon::now()->year));  // bool(false)

String Formatting

所有可用的toXXXString()方法都依赖于基类方法DateTime: format()。您将注意到__toString()方法的定义,它允许在字符串上下文中使用时将一个Carbon实例打印为一个漂亮的日期时间字符串。

$dt =  Carbon::create(1975,  12,  25,  14,  15,  16);
var_dump($dt->toDateTimeString()  == $dt);  // bool(true) => uses __toString()
echo $dt->toDateString();  // 1975-12-25
echo $dt->toFormattedDateString();  // Dec 25, 1975
echo $dt->toTimeString();  // 14:15:16
echo $dt->toDateTimeString();  // 1975-12-25 14:15:16
echo $dt->toDayDateTimeString();  // Thu, Dec 25, 1975 2:15 PM
// ... of course format() is still available
echo $dt->format('l jS \\of F Y h:i:s A');  // Thursday 25th of December 1975 02:15:16 PM
// The reverse hasFormat method allows you to test if a string looks like a given format
var_dump($dt->hasFormat('Thursday 25th December 1975 02:15:16 PM',  'l jS F Y h:i:s A'));  // bool(true)

您还可以设置默认的__toString()格式(默认为Y-m-d H

s),这是在发生类型杂耍时使用的格式。

Carbon::setToStringFormat('jS \o\f F, Y g:i:s a');
echo $dt;  // 25th of December, 1975 2:15:16 pm
Carbon::resetToStringFormat();
echo $dt;  // 1975-12-25 14:15:16

NOTE:对于本地化支持,请参阅本地化部分。

Common Formats

下面是DateTime类中提供的公共格式的包装器。

$dt =  Carbon::createFromFormat('Y-m-d H:i:s.u',  '2019-02-01 03:45:27.612584');
// $dt->toAtomString() is the same as $dt->format(DateTime::ATOM);
echo $dt->toAtomString();  // 2019-02-01T03:45:27-05:00
echo $dt->toCookieString();  // Friday, 01-Feb-2019 03:45:27 EST
echo $dt->toIso8601String();  // 2019-02-01T03:45:27-05:00
// Be aware we chose to use the full-extended format of the ISO 8601 norm
// Natively, DateTime::ISO8601 format is not compatible with ISO-8601 as it
// is explained here in the PHP documentation:
// https://php.net/manual/class.datetime.php#datetime.constants.iso8601
// We consider it as a PHP mistake and chose not to provide method for this
// format, but you still can use it this way:
echo $dt->format(DateTime::ISO8601);  // 2019-02-01T03:45:27-0500
echo $dt->toIso8601ZuluString();  // 2019-02-01T08:45:27Z
echo $dt->toRfc822String();  // Fri, 01 Feb 19 03:45:27 -0500
echo $dt->toRfc850String();  // Friday, 01-Feb-19 03:45:27 EST
echo $dt->toRfc1036String();  // Fri, 01 Feb 19 03:45:27 -0500
echo $dt->toRfc1123String();  // Fri, 01 Feb 2019 03:45:27 -0500
echo $dt->toRfc2822String();  // Fri, 01 Feb 2019 03:45:27 -0500
echo $dt->toRfc3339String();  // 2019-02-01T03:45:27-05:00
echo $dt->toRfc7231String();  // Fri, 01 Feb 2019 08:45:27 GMT
echo $dt->toRssString();  // Fri, 01 Feb 2019 03:45:27 -0500
echo $dt->toW3cString();  // 2019-02-01T03:45:27-05:00
var_dump($dt->toArray());
/*
 array(12) {
 ["year"]=>
int(2019)
["month"]=>
int(2)
["day"]=>
int(1)
["dayOfWeek"]=>
int(5)
["dayOfYear"]=>
 int(31)
 ["hour"]=>
 int(3)
 ["minute"]=>
int(45)
["second"]=>
 int(27)
["micro"]=>
int(612584)
["timestamp"]=>
int(1549010727)
["formatted"]=>
 string(19) "2019-02-01 03:45:27"
 ["timezone"]=>
object(DateTimeZone)#118 (2) {
["timezone_type"]=>
 int(3)
 ["timezone"]=>
 string(15) "America/Toronto"
 }
 }
*/

Comparison

通过以下函数提供了简单的比较。请记住,比较是在UTC时区进行的,所以事情并不总是像看上去的那样。

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($second));  // bool(true)
// All have verbose aliases and PHP equivalent code:
var_dump($first->eq($second));  // bool(false)
var_dump($first->equalTo($second));  // bool(false)
var_dump($first == $second);  // bool(false)
var_dump($first->ne($second));  // bool(true)
var_dump($first->notEqualTo($second));  // bool(true)
var_dump($first != $second);  // bool(true)
var_dump($first->gt($second));  // bool(false)
var_dump($first->greaterThan($second));  // bool(false)
var_dump($first > $second);  // bool(false)
var_dump($first->gte($second));  // bool(false)
var_dump($first->greaterThanOrEqualTo($second));  // bool(false)
var_dump($first >= $second);  // bool(false)
var_dump($first->lt($second));  // bool(true)
var_dump($first->lessThan($second));  // bool(true)
var_dump($first < $second);  // bool(true)
var_dump($first->lte($second));  // bool(true)
var_dump($first->lessThanOrEqualTo($second));  // bool(true)
var_dump($first <= $second);  // bool(true)

这些方法使用PHP $date1 == $date2提供的自然比较,因此在PHP 7.1之前,所有方法都将忽略milli/micro-seconds,然后从7.1开始考虑它们。

要确定当前实例是否在其他两个实例之间,可以使用恰当命名的between()方法。第三个参数表示是否应该进行相等的比较。默认值是true,它决定了它的中间值还是等于边界。

$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)

哇!你忘记了min()和max()了吗?不。这也被适当命名的min()和max()方法或minimum()和maximum()别名所覆盖。与往常一样,如果指定为null,则默认参数现在为。

$dt1 =  Carbon::createMidnightDate(2012,  1,  1);
$dt2 =  Carbon::createMidnightDate(2014,  1,  30);
echo $dt1->min($dt2);  // 2012-01-01 00:00:00
echo $dt1->minimum($dt2);  // 2012-01-01 00:00:00
$dt1 =  Carbon::createMidnightDate(2012,  1,  1);
$dt2 =  Carbon::createMidnightDate(2014,  1,  30);
echo $dt1->max($dt2);  // 2014-01-30 00:00:00
echo $dt1->maximum($dt2);  // 2014-01-30 00:00:00
// now is the default param
$dt1 =  Carbon::createMidnightDate(2000,  1,  1);
echo $dt1->max();  // 2018-07-05 03:37:12
echo $dt1->maximum();  // 2018-07-05 03:37:12
$dt1 =  Carbon::createMidnightDate(2010,  4,  1);
$dt2 =  Carbon::createMidnightDate(2010,  3,  28);
$dt3 =  Carbon::createMidnightDate(2010,  4,  16);
// returns the closest of two date (no matter before or after)
echo $dt1->closest($dt2, $dt3);  // 2010-03-28 00:00:00
echo $dt2->closest($dt1, $dt3);  // 2010-04-01 00:00:00
echo $dt3->closest($dt2, $dt1);  // 2010-04-01 00:00:00 
// returns the farthest of two date (no matter before or after)
echo $dt1->farthest($dt2, $dt3);  // 2010-04-16 00:00:00
echo $dt2->farthest($dt1, $dt3);  // 2010-04-16 00:00:00
. echo $dt3->farthest($dt2, $dt1);  // 2010-03-28 00:00:00

为了处理最常用的情况,这里有一些简单的帮助函数,希望它们的名称能很明显地反映出来。对于以某种方式与now() (ex.istoday()))进行比较的方法,now()是在与实例相同的时区创建的。

$dt =  Carbon::now();
$dt2 =  Carbon::createFromDate(1987,  4,  23);
$dt->isSameAs('w', $dt2);  // w is the date of the week, so this will return true if $dt and $dt2
// the same day of week (both monday or both sunday, etc.)
// you can use any format and combine as much as you want.
$dt->isFuture();
$dt->isPast();
$dt->isSameYear($dt2);
$dt->isCurrentYear();
$dt->isNextYear();
$dt->isLastYear();
$dt->isLongYear();  // see https://en.wikipedia.org/wiki/ISO_8601#Week_dates
$dt->isLeapYear();
$dt->isSameQuarter($dt2);  // same quarter (3 months) no matter the year of the given date
$dt->isSameQuarter($dt2,  true);  // same quarter of the same year of the given date
/*
Alternatively, you can run Carbon::compareYearWithMonth() to compare both quarter and year by default,
In this case you can use $dt->isSameQuarter($dt2, false) to compare ignoring the year
Run Carbon::compareYearWithMonth(false) to reset to the default behavior
Run Carbon::shouldCompareYearWithMonth() to get the current setting
*/
$dt->isCurrentQuarter();
$dt->isNextQuarter();  // date is in the next quarter
$dt->isLastQuarter();  // in previous quarter
$dt->isSameMonth($dt2);  // same month no matter the year of the given date
$dt->isSameMonth($dt2,  true);  // same month of the same year of the given date
/*
As for isSameQuarter, you can run Carbon::compareYearWithMonth() to compare both month and year by default,
In this case you can use $dt->isSameMonth($dt2, false) to compare ignoring the year
Run Carbon::compareYearWithMonth(false) to reset to the default behavior
Run Carbon::shouldCompareYearWithMonth() to get the current setting
*/
$dt->isCurrentMonth();
$dt->isNextMonth();
$dt->isLastMonth();
$dt->isWeekday();
$dt->isWeekend();
$dt->isMonday();
$dt->isTuesday();
$dt->isWednesday();
$dt->isThursday();
$dt->isFriday();
$dt->isSaturday();
$dt->isSunday();
$dt->isDayOfWeek(Carbon::SATURDAY);  // is a saturday
$dt->isLastOfMonth();  // is the last day of the month
$dt->isSameDay($dt2);  // Same day of same month of same year
$dt->isCurrentDay();
$dt->isYesterday();
$dt->isToday();
$dt->isTomorrow();
$dt->isNextWeek();
$dt->isLastWeek();
$dt->isSameHour($dt2);
$dt->isCurrentHour();
$dt->isSameMinute($dt2);
$dt->isCurrentMinute();
$dt->isSameSecond($dt2);
$dt->isCurrentSecond();
$dt->isStartOfDay();  // check if hour is 00:00:00
$dt->isMidnight();  // check if hour is 00:00:00 (isStartOfDay alias)
$dt->isEndOfDay();  // check if hour is 23:59:59
$dt->isMidday();  // check if hour is 12:00:00 (or other midday hour set with Carbon::setMidDayAt())
$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!

Addition and Subtraction

默认的DateTime提供了几种不同的方法来方便地添加和减少时间。有modify()、add()和sub()。modify()使用一个魔术date/time格式字符串“last day of next month”,它解析并应用修改,而add()和sub()则期望一个不那么明显的日期间隔实例(例如新的\日期间隔(‘P6YT5M’)将意味着65分钟)。希望使用这些流畅的函数将会更加清晰,并且在几个星期内没有看到您的代码后更容易阅读。当然,我不会让您选择,因为基类函数仍然可用。

$dt =  Carbon::create(2012,  1,  31,  0);
echo $dt->toDateTimeString();  // 2012-01-31 00:00:00
echo $dt->addCenturies(5);  // 2512-01-31 00:00:00
echo $dt->addCentury();  // 2612-01-31 00:00:00
echo $dt->subCentury();  // 2512-01-31 00:00:00
echo $dt->subCenturies(5);  // 2012-01-31 00:00:00
echo $dt->addYears(5);  // 2017-01-31 00:00:00
echo $dt->addYear();  // 2018-01-31 00:00:00
echo $dt->subYear();  // 2017-01-31 00:00:00
echo $dt->subYears(5);  // 2012-01-31 00:00:00
echo $dt->addQuarters(2);  // 2012-07-31 00:00:00
echo $dt->addQuarter();  // 2012-10-31 00:00:00
echo $dt->subQuarter();  // 2012-07-31 00:00:00
echo $dt->subQuarters(2);  // 2012-01-31 00:00:00
echo $dt->addMonths(60);  // 2017-01-31 00:00:00
echo $dt->addMonth();  // 2017-03-03 00:00:00 equivalent of $dt->month($dt->month + 1); so it wraps
echo $dt->subMonth();  // 2017-02-03 00:00:00
echo $dt->subMonths(60);  // 2012-02-03 00:00:00
echo $dt->addDays(29);  // 2012-03-03 00:00:00
echo $dt->addDay();  // 2012-03-04 00:00:00
echo $dt->subDay();  // 2012-03-03 00:00:00
echo $dt->subDays(29);  // 2012-02-03 00:00:00
echo $dt->addWeekdays(4);  // 2012-02-09 00:00:00
echo $dt->addWeekday();  // 2012-02-10 00:00:00
echo $dt->subWeekday();  // 2012-02-09 00:00:00
echo $dt->subWeekdays(4);  // 2012-02-03 00:00:00
echo $dt->addWeeks(3);  // 2012-02-24 00:00:00
echo $dt->addWeek();  // 2012-03-02 00:00:00
echo $dt->subWeek();  // 2012-02-24 00:00:00
echo $dt->subWeeks(3);  // 2012-02-03 00:00:00
echo $dt->addHours(24);  // 2012-02-04 00:00:00
echo $dt->addHour();  // 2012-02-04 01:00:00
echo $dt->subHour();  // 2012-02-04 00:00:00
echo $dt->subHours(24);  // 2012-02-03 00:00:00
echo $dt->addMinutes(61);  // 2012-02-03 01:01:00
echo $dt->addMinute();  // 2012-02-03 01:02:00
echo $dt->subMinute();  // 2012-02-03 01:01:00
echo $dt->subMinutes(61);  // 2012-02-03 00:00:00
echo $dt->addSeconds(61);  // 2012-02-03 00:01:01
echo $dt->addSecond();  // 2012-02-03 00:01:02
echo $dt->subSecond();  // 2012-02-03 00:01:01
echo $dt->subSeconds(61);  // 2012-02-03 00:00:00

为了好玩,您还可以将负值传递给addXXX(),实际上这就是subXXX()实现的方式。 附注:如果你忘记并使用addDay(5) 或subYear(3),我支持你; 默认情况下,Carbon依赖于底层父类PHP DateTime行为。因此,增加或减少月份可能会溢出,例如:

$dt =  Carbon::create(2017,  1,  31,  0);
echo $dt->copy()->addMonth();  // 2017-03-03 00:00:00
echo $dt->copy()->subMonths(2);  // 2016-12-01 00:00:00
为了防止溢出Carbon:usemonthverflow (false)
Carbon::useMonthsOverflow(false);
$dt =  Carbon::createMidnightDate(2017,  1,  31);
echo $dt->copy()->addMonth();  // 2017-02-28 00:00:00
echo $dt->copy()->subMonths(2);  // 2016-11-30 00:00:00
// Call the method with true to allow overflow again
Carbon::resetMonthsOverflow();  // same as Carbon::useMonthsOverflow(true);

方法Carbon:::shouldOverflowMonths()允许您知道当前是否启用了溢出。您也可以使用->addMonthsNoOverflow, ->subMonthsNoOverflow, ->addMonthsWithOverflow, -> submonth withoverflow(或单数方法,不含s至“month”),显式add/sub,无论当前模式如何,都可以添加或不添加溢出。

Carbon::useMonthsOverflow(false);
$dt =  Carbon::createMidnightDate(2017,  1,  31);
echo $dt->copy()->addMonthWithOverflow();  // 2017-03-03 00:00:00
// plural addMonthsWithOverflow() method is also available
echo $dt->copy()->subMonthsWithOverflow(2);  // 2016-12-01 00:00:00
// singular subMonthWithOverflow() method is also available
echo $dt->copy()->addMonthNoOverflow();  // 2017-02-28 00:00:00
// plural addMonthsNoOverflow() method is also available
echo $dt->copy()->subMonthsNoOverflow(2);  // 2016-11-30 00:00:00
// singular subMonthNoOverflow() method is also available
echo $dt->copy()->addMonth();  // 2017-02-28 00:00:00
echo $dt->copy()->subMonths(2);  // 2016-11-30 00:00:00
Carbon::useMonthsOverflow(true);
$dt =  Carbon::createMidnightDate(2017,  1,  31);
echo $dt->copy()->addMonthWithOverflow();  // 2017-03-03 00:00:00
echo $dt->copy()->subMonthsWithOverflow(2);  // 2016-12-01 00:00:00
echo $dt->copy()->addMonthNoOverflow();  // 2017-02-28 00:00:00
echo $dt->copy()->subMonthsNoOverflow(2);  // 2016-11-30 00:00:00
echo $dt->copy()->addMonth();  // 2017-03-03 00:00:00
echo $dt->copy()->subMonths(2);  // 2016-12-01 00:00:00
Carbon::resetMonthsOverflow();

1.23.0版本开始,在以下年份也可以使用溢出控制:

Carbon::useYearsOverflow(false);
$dt =  Carbon::createMidnightDate(2020,  2,  29);
var_dump(Carbon::shouldOverflowYears());  // bool(false)
echo $dt->copy()->addYearWithOverflow();  // 2021-03-01 00:00:00
// plural addYearsWithOverflow() method is also available
echo $dt->copy()->subYearsWithOverflow(2);  // 2018-03-01 00:00:00
// singular subYearWithOverflow() method is also available
echo $dt->copy()->addYearNoOverflow();  // 2021-02-28 00:00:00
// plural addYearsNoOverflow() method is also available
echo $dt->copy()->subYearsNoOverflow(2);  // 2018-02-28 00:00:00
// singular subYearNoOverflow() method is also available
echo $dt->copy()->addYear();  // 2021-02-28 00:00:00
echo $dt->copy()->subYears(2);  // 2018-02-28 00:00:00
Carbon::useYearsOverflow(true);
$dt =  Carbon::createMidnightDate(2020,  2,  29);
var_dump(Carbon::shouldOverflowYears());  // bool(true)
echo $dt->copy()->addYearWithOverflow();  // 2021-03-01 00:00:00
echo $dt->copy()->subYearsWithOverflow(2);  // 2018-03-01 00:00:00
echo $dt->copy()->addYearNoOverflow();  // 2021-02-28 00:00:00
echo $dt->copy()->subYearsNoOverflow(2);  // 2018-02-28 00:00:00
echo $dt->copy()->addYear();  // 2021-03-01 00:00:00
echo $dt->copy()->subYears(2);  // 2018-03-01 00:00:00
Carbon::resetYearsOverflow();

Difference

由于Carbon继承了DateTime,它继承了它的方法,如diff(),它将第二个date对象作为参数,并返回一个DateInterval实例。

我们还提供了diffAsCarbonInterval(),类似于diff(),但返回一个CarbonInterval实例。检查CarbonInterval 章节了解更多信息。每个单元的Carbon添加了diff方法,如diffInYears()、diffInMonths()等。diffAsCarbonInterval()和diffIn*()方法都可以使用两个可选参数:date to compare with(如果缺失,now是默认值),以及一个绝对布尔选项(默认为true),无论哪个日期大于另一个,该方法都返回一个绝对值。如果设置为false,则在调用方法的实例大于比较日期(第一个参数或now)时返回负值。注意,diff()原型是不同的:它的第一个参数(date)是强制性的,第二个参数(绝对选项)默认为false

这些函数总是返回在指定的时间内表示的总差异。这与基类diff()函数不同,该函数的时间间隔为122秒,通过DateInterval实例返回2分零2秒。diffInMinutes()函数只返回2,而diffInSeconds()将返回122。所有的值都被截断而不是四舍五入。下面的每个函数都有一个默认的第一个参数,该参数是要比较的Carbon实例,如果您想使用now(),则为null。第二个参数也是可选的,如果您希望返回值是绝对值,或者如果传递的日期小于当前实例,则返回值可能具有-(负)符号的相对值。这将默认为true,返回绝对值。

echo Carbon::now('America/Vancouver')->diffInSeconds(Carbon::now('Europe/London'));  //
$dtOttawa =  Carbon::createMidnightDate(2000,  1,  1,  'America/Toronto');
$dtVancouver =  Carbon::createMidnightDate(2000,  1,  1,  'America/Vancouver');
echo $dtOttawa->diffInHours($dtVancouver);  //
echo $dtVancouver->diffInHours($dtOttawa);  //
echo $dtOttawa->diffInHours($dtVancouver,  false);  //
echo $dtVancouver->diffInHours($dtOttawa,  false);  // -3
$dt =  Carbon::createMidnightDate(2012,  1,  31);
echo $dt->diffInDays($dt->copy()->addMonth());  //
echo $dt->diffInDays($dt->copy()->subMonth(),  false);  // -31
$dt =  Carbon::createMidnightDate(2012,  4,  30);
echo $dt->diffInDays($dt->copy()->addMonth());  //
echo $dt->diffInDays($dt->copy()->addWeek());  //
$dt =  Carbon::createMidnightDate(2012,  1,  1);
echo $dt->diffInMinutes($dt->copy()->addSeconds(59));  //
echo $dt->diffInMinutes($dt->copy()->addSeconds(60));  //
echo $dt->diffInMinutes($dt->copy()->addSeconds(119));  //
echo $dt->diffInMinutes($dt->copy()->addSeconds(120));  //
echo $dt->addSeconds(120)->secondsSinceMidnight();  //
$interval = $dt->diffAsCarbonInterval($dt->copy()->subYears(3),  false);
echo ($interval->invert ?  'minus '  :  'plus ')  . $interval->years;  // minus 3

关于夏令时(DST)的重要注意,默认情况下,PHP DateTime不考虑DST,这意味着,像2014330日这样只有23小时的一天在伦敦将被计算为24小时。

$date =  new  DateTime('2014-03-30 00:00:00',  new  DateTimeZone('Europe/London'));  // DST off
echo $date->modify('+25 hours')->format('H:i');  // 01:00 (DST on, 24 hours only have been actually added)

Carbon也遵循这种行为,增加/减少/降低秒/分钟/小时。但是我们提供了使用时间戳进行实时工作的方法:

$date =  new  Carbon('2014-03-30 00:00:00',  'Europe/London');  // DST off
echo $date->addRealHours(25)->format('H:i');  // 02:00 (DST on)
echo $date->diffInRealHours('2014-03-30 00:00:00');  //
echo $date->diffInHours('2014-03-30 00:00:00');  //
echo $date->diffInRealMinutes('2014-03-30 00:00:00');  //
echo $date->diffInMinutes('2014-03-30 00:00:00');  //
echo $date->diffInRealSeconds('2014-03-30 00:00:00');  //
echo $date->diffInSeconds('2014-03-30 00:00:00');  //
echo $date->subRealHours(25)->format('H:i');  // 00:00 (DST off)

同样的方法可以使用addRealMinutes()、subRealMinutes()、addRealSeconds()、subRealSeconds()和所有它们的唯一快捷方式:addRealHour()、subRealHour()、addrealmin()、subRealMinute()、addRealSecond()、subRealSecond()。

还有特殊的过滤器函数diffindaysfilter()、diffinhoursfilter()和difffilter(),以帮助您按天数、小时或自定义间隔过滤差异。例如,计算两个实例之间的周末天数:

$dt =  Carbon::create(2014,  1,  1);
$dt2 =  Carbon::create(2014,  12,  31);
$daysForExtraCoding = $dt->diffInDaysFiltered(function(Carbon $date)  {
    return $date->isWeekend();
}, $dt2);
echo $daysForExtraCoding;  //
$dt =  Carbon::create(2014,  1,  1)->endOfDay();
$dt2 = $dt->copy()->startOfDay();
$littleHandRotations = $dt->diffFiltered(CarbonInterval::minute(),  function(Carbon $date)  {
    return $date->minute ===  0;
}, $dt2,  true);  // true as last parameter returns absolute value
echo $littleHandRotations;  //
$date =  Carbon::now()->addSeconds(3666);
echo $date->diffInSeconds();  //
echo $date->diffInMinutes();  //
echo $date->diffInHours();  //
echo $date->diffInDays();  //
$date =  Carbon::create(2016,  1,  5,  22,  40,  32);
echo $date->secondsSinceMidnight();  //
echo $date->secondsUntilEndOfDay();  //
$date1 =  Carbon::createMidnightDate(2016,  1,  5);
$date2 =  Carbon::createMidnightDate(2017,  3,  15);
echo $date1->diffInDays($date2);  //
echo $date1->diffInWeekdays($date2);  //
echo $date1->diffInWeekendDays($date2);  //
echo $date1->diffInWeeks($date2);  //
echo $date1->diffInMonths($date2);  //
echo $date1->diffInYears($date2);  //

所有的diffIn*滤波方法都采用1个可调用滤波器作为必要参数,一个date对象作为可选的第二个参数,如果缺失,使用now。您也可以将true作为第三个参数传递,以获得绝对值。

对于周/周末的高级处理,使用以下工具:

echo implode(', ',  Carbon::getDays());  // Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
$saturday =  new  Carbon('first saturday of 2019');
$sunday =  new  Carbon('first sunday of 2019');
$monday =  new  Carbon('first monday of 2019');
echo implode(', ',  Carbon::getWeekendDays());  // 6, 0
var_dump($saturday->isWeekend());  // bool(true)
var_dump($sunday->isWeekend());  // bool(true)
var_dump($monday->isWeekend());  // bool(false)
Carbon::setWeekendDays(array(
    Carbon::SUNDAY,
    Carbon::MONDAY,
));  //自定义设置“周末”
echo implode(', ',  Carbon::getWeekendDays());  // 0, 1
var_dump($saturday->isWeekend());  // bool(false),周六返回false
var_dump($sunday->isWeekend());  // bool(true)
var_dump($monday->isWeekend());  // bool(true),周一返回true
Carbon::setWeekendDays(array(
    Carbon::SATURDAY,
    Carbon::SUNDAY,
 ));
// weekend days and start/end of week or not linked
Carbon::setWeekStartsAt(Carbon::FRIDAY);
Carbon::setWeekEndsAt(Carbon::WEDNESDAY);  // and it does not need neither to precede the start
var_dump(Carbon::getWeekStartsAt()  ===  Carbon::FRIDAY);  // bool(true)
var_dump(Carbon::getWeekEndsAt()  ===  Carbon::WEDNESDAY);  // bool(true)
echo $saturday->copy()->startOfWeek()->toRfc850String();  // Friday, 06-Jul-18 00:00:00 EDT
echo $saturday->copy()->endOfWeek()->toRfc850String();  // Wednesday, 11-Jul-18 23:59:59 EDT
Carbon::setWeekStartsAt(Carbon::MONDAY);
Carbon::setWeekEndsAt(Carbon::SUNDAY);
echo $saturday->copy()->startOfWeek()->toRfc850String();  // Monday, 02-Jul-18 00:00:00 EDT
echo $saturday->copy()->endOfWeek()->toRfc850String();  // Sunday, 08-Jul-18 23:59:59 EDT
Difference for Humans

对人类来说,一个月前比30天前更容易阅读。这是在大多数日期库中常见的函数,所以我也想在这里添加它。函数的唯一参数是另一个要对其进行diff的Carbon实例,当然,如果没有指定,它默认为now()。

此方法将在相对于实例的差值和传入实例的差值之后添加短语。有4个可能性:

当将过去的值与现在的默认值进行比较时:

1小时前

5个月前

当将未来的值与现在的默认值进行比较时:

从现在开始的1小时

从现在开始的5个月

当比较一个过去的值与另一个值时:

1小时

5个月前

当比较未来的价值与另一个价值时:

1小时后

5个月后

您还可以将true作为第二个参数传递,以便从现在开始删除修饰符,等等:diffforhuman ($other, true)。

如果在所使用的语言环境:diffforhuman ($other, false, true)中可用,您可以将true作为第三个参数传递给它,以使用简短语法。

您可以将16之间的数字作为第4个参数传递给diffforhuman ($other, false, false, 4)。

$other实例可以是DateTime、Carbon实例或任何实现DateTimeInterface的对象,如果传递了一个字符串,它将被解析为获取一个Carbon实例,如果传递了null,那么将使用Carbon: now()。

// The most typical usage is for comments
// The instance is the date the comment was created and its being compared to default now()
echo Carbon::now()->subDays(5)->diffForHumans();  // 5 days ago
echo Carbon::now()->diffForHumans(Carbon::now()->subYear());  // 1 year after
$dt =  Carbon::createFromDate(2011,  8,  1);
echo $dt->diffForHumans($dt->copy()->addMonth());  // 1 month before
echo $dt->diffForHumans($dt->copy()->subMonth());  // 1 month after
echo Carbon::now()->addSeconds(5)->diffForHumans();  // 5 seconds from now
echo Carbon::now()->subDays(24)->diffForHumans();  // 3 weeks ago(21-27都返回这个,一个周的单位是7天,小于7直接舍去)
echo Carbon::now()->subDays(24)->diffForHumans(null,  true);  // 3 weeks(21-27都返回这个,一个周的单位是7天,小于7直接舍去)
echo Carbon::parse('2019-08-03')->diffForHumans('2019-08-13');  // 1 week before(时间间隔7-13天都是返回这个,一个周的单位是7天,小于7直接舍去)
echo Carbon::parse('2000-01-01 00:50:32')->diffForHumans('@946684800');  // 5 hours after(同理,都是舍去的)
echo Carbon::create(2018,  2,  26,  4,  29,  43)->diffForHumans(Carbon::create(2016,  6,  21,  0,  0,  0),  false,  false,  6);  // 1 year 8 months 5 days 4 hours 29 minutes 43 seconds after

您还可以在调用diffforhuman()之前使用Carbon::setLocale(‘fr’)更改字符串的locale。有关更多细节,请参见本地化部分。

可以通过以下方式启用/禁用diffforhuman()选项:

Carbon::enableHumanDiffOption(Carbon::NO_ZERO_DIFF);
var_dump((bool)  (Carbon::getHumanDiffOptions()  &  Carbon::NO_ZERO_DIFF));  // bool(true)
Carbon::disableHumanDiffOption(Carbon::NO_ZERO_DIFF);
var_dump((bool)  (Carbon::getHumanDiffOptions()  &  Carbon::NO_ZERO_DIFF));  // bool(false)

可用的选项是:

Carbon::NO_ZERO_DIFF(默认启用):将空diff变为1秒
Carbon::JUST_NOW在默认情况下是禁用的):从现在开始变为“刚才”
Carbon:ONE_DAY_WORDS(默认禁用):将“从现在/之前1天”变为“昨天/明天”
Carbon::TWO_DAY_WORDS(默认禁用):将“从现在/之前2天”变为“昨天/之后”
Carbon::JUST_NOW,Carbon::ONE_DAY_WORDS和Carbon::TWO_DAY_WORDS现在只能使用en和fr语言,其他语言将会恢复到以前的行为,直到添加缺失的翻译。

使用管道操作符一次启用/禁用多个选项,例如

:ONE_DAY_WORDS | Carbon::TWO_DAY_WORDS

您还可以使用setHumanDiffOptions($options)禁用所有选项,然后只激活作为参数传递的选项。

Modifiers

这些方法组对当前实例进行了有益的修改。他们中的大多数方法的名字都是不言自明的……或者至少应该是这样。您还会注意到startOfXXX()、next()和previous()方法将时间设置为00:00,endOfXXX()方法将时间设置为23:59:59

唯一稍有不同的是average()函数。它将实例移动到其本身和提供的碳参数之间的中间日期。

$dt =  Carbon::create(2012,  1,  31,  15,  32,  45);
echo $dt->startOfMinute();  // 2012-01-31 15:32:00
$dt =  Carbon::create(2012,  1,  31,  15,  32,  45);
echo $dt->endOfMinute();  // 2012-01-31 15:32:59
$dt =  Carbon::create(2012,  1,  31,  15,  32,  45);
echo $dt->startOfHour();  // 2012-01-31 15:00:00
$dt =  Carbon::create(2012,  1,  31,  15,  32,  45);
echo $dt->endOfHour();  // 2012-01-31 15:59:59
$dt =  Carbon::create(2012,  1,  31,  15,  32,  45);
echo Carbon::getMidDayAt();  // 12获取正午时间
echo $dt->midDay();  // 2012-01-31 12:00:00
Carbon::setMidDayAt(13);  //设置正午时间为13点
echo Carbon::getMidDayAt();  //
echo $dt->midDay();  // 2012-01-31 13:00:00
Carbon::setMidDayAt(12);
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->startOfDay();  // 2012-01-31 00:00:00
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->endOfDay();  // 2012-01-31 23:59:59
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->startOfMonth();  // 2012-01-01 00:00:00
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->endOfMonth();  // 2012-01-31 23:59:59
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->startOfYear();  // 2012-01-01 00:00:00
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->endOfYear();  // 2012-12-31 23:59:59
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->startOfDecade();  // 2010-01-01 00:00:00 十年(“年代?”)的开始1990,2000,2010,2010
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->endOfDecade();  // 2019-12-31 23:59:59
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->startOfCentury();  // 2001-01-01 00:00:00 世纪的开始?为什么不是2000-01-01 00:00:00???可能老外就是这个定义的吧……
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->endOfCentury();  // 2100-12-31 23:59:59 世纪的结束?为什么不是2099-12-31 23:59:59???
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->startOfWeek();  // 2012-01-30 00:00:00
var_dump($dt->dayOfWeek ==  Carbon::MONDAY);  // bool(true) : ISO8601 week starts on Monday ISO8601标准每周的开始是周一,老外好像认为每周的开始是周日……
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->endOfWeek();  // 2012-02-05 23:59:59
var_dump($dt->dayOfWeek ==  Carbon::SUNDAY);  // bool(true) : ISO8601 week ends on Sunday
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->next(Carbon::WEDNESDAY);  // 2012-02-01 00:00:00 传了参数表示“下一个周三”,不传表示“明天”
var_dump($dt->dayOfWeek ==  Carbon::WEDNESDAY);  // bool(true)
$dt =  Carbon::create(2012,  1,  1,  12,  0,  0);
echo $dt->next();  // 2012-01-08 00:00:00
$dt =  Carbon::create(2012,  1,  31,  12,  0,  0);
echo $dt->previous(Carbon::WEDNESDAY);  // 2012-01-25 00:00:00 传了参数表示“上一个周三”,不传表示“昨天”
var_dump($dt->dayOfWeek ==  Carbon::WEDNESDAY);  // bool(true)
$dt =  Carbon::create(2012,  1,  1,  12,  0,  0);
echo $dt->previous();  // 2011-12-25 00:00:00
$start =  Carbon::create(2014,  1,  1,  0,  0,  0);
$end =  Carbon::create(2014,  1,  30,  0,  0,  0);
echo $start->average($end);  // 2014-01-15 12:00:00 (1+30)/2 = 15 int运算
echo Carbon::create(2014,  5,  30,  0,  0,  0)->firstOfMonth();  // 2014-05-01 00:00:00 这个月的第一天
echo Carbon::create(2014,  5,  30,  0,  0,  0)->firstOfMonth(Carbon::MONDAY);  // 2014-05-05 00:00:00 这个月的第一个周一
echo Carbon::create(2014,  5,  30,  0,  0,  0)->lastOfMonth();  // 2014-05-31 00:00:00 这个月的最后一天
echo Carbon::create(2014,  5,  30,  0,  0,  0)->lastOfMonth(Carbon::TUESDAY);  // 2014-05-27 00:00:00 这个月的最后一个周二
echo Carbon::create(2014,  5,  30,  0,  0,  0)->nthOfMonth(2,  Carbon::SATURDAY);  // 2014-05-10 00:00:00 这个月的第“2”个“周六”,2和周六是参数
echo Carbon::create(2014,  5,  30,  0,  0,  0)->firstOfQuarter();  // 2014-04-01 00:00:00 这个季度的第一天(5月是第二个季度,所以是4月1号)
echo Carbon::create(2014,  5,  30,  0,  0,  0)->firstOfQuarter(Carbon::MONDAY);  // 2014-04-07 00:00:00 这个季度的第一个周一
echo Carbon::create(2014,  5,  30,  0,  0,  0)->lastOfQuarter();  // 2014-06-30 00:00:00 这个季度的最后一天
echo Carbon::create(2014,  5,  30,  0,  0,  0)->lastOfQuarter(Carbon::TUESDAY);  // 2014-06-24 00:00:00 这个季度的最后一个周二
echo Carbon::create(2014,  5,  30,  0,  0,  0)->nthOfQuarter(2,  Carbon::SATURDAY);  // 2014-04-12 00:00:00 这个季度的第“2”个“周六”,2和周六是参数
echo Carbon::create(2014,  5,  30,  0,  0,  0)->startOfQuarter();  // 2014-04-01 00:00:00 这个季度的开始
echo Carbon::create(2014,  5,  30,  0,  0,  0)->endOfQuarter();  // 2014-06-30 23:59:59 这个季度的结束
echo Carbon::create(2014,  5,  30,  0,  0,  0)->firstOfYear();  // 2014-01-01 00:00:00 同上……
echo Carbon::create(2014,  5,  30,  0,  0,  0)->firstOfYear(Carbon::MONDAY);  // 2014-01-06 00:00:00
echo Carbon::create(2014,  5,  30,  0,  0,  0)->lastOfYear();  // 2014-12-31 00:00:00
echo Carbon::create(2014,  5,  30,  0,  0,  0)->lastOfYear(Carbon::TUESDAY);  // 2014-12-30 00:00:00
echo Carbon::create(2014,  5,  30,  0,  0,  0)->nthOfYear(2,  Carbon::SATURDAY);  // 2014-01-11 00:00:00
echo Carbon::create(2018,  2,  23,  0,  0,  0)->nextWeekday();  // 2018-02-26 00:00:00 下周一
echo Carbon::create(2018,  2,  23,  0,  0,  0)->previousWeekday();  // 2018-02-22 00:00:00 这周的上一个工作日
echo Carbon::create(2018,  2,  21,  0,  0,  0)->nextWeekendDay();  // 2018-02-24 00:00:00 即将要过的周末的第一天(即这星期的周六,如果今天是周六,则结果是周日)
echo Carbon::create(2018,  2,  21,  0,  0,  0)->previousWeekendDay();  // 2018-02-18 00:00:00 刚过完的周末的最后一个(即上一周的周日,如果今天是周日,则结果是周六)

Constants

下面的常数是在Carbon中定义的。

// These getters specifically return integers, ie intval()
var_dump(Carbon::SUNDAY);  // int(0)
var_dump(Carbon::MONDAY);  // int(1)
var_dump(Carbon::TUESDAY);  // int(2)
var_dump(Carbon::WEDNESDAY);  // int(3)
var_dump(Carbon::THURSDAY);  // int(4)
var_dump(Carbon::FRIDAY);  // int(5)
var_dump(Carbon::SATURDAY);  // int(6)
var_dump(Carbon::YEARS_PER_CENTURY);  // int(100)
var_dump(Carbon::YEARS_PER_DECADE);  // int(10)
var_dump(Carbon::MONTHS_PER_YEAR);  // int(12)
var_dump(Carbon::WEEKS_PER_YEAR);  // int(52)
var_dump(Carbon::DAYS_PER_WEEK);  // int(7)
var_dump(Carbon::HOURS_PER_DAY);  // int(24)
var_dump(Carbon::MINUTES_PER_HOUR);  // int(60)
var_dump(Carbon::SECONDS_PER_MINUTE);  // int(60)
$dt =  Carbon::createFromDate(2012,  10,  6);
if  ($dt->dayOfWeek ===  Carbon::SATURDAY)  {
    echo 'Place bets on Ottawa Senators Winning!';
}

Serialization

Carbon实例能被序列化的。

$dt =  Carbon::create(2012,  12,  25,  20,  30,  00,  'Europe/Moscow');
echo serialize($dt);  // O:13:"Carbon\Carbon":3:{s:4:"date";s:26:"2012-12-25 20:30:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/Moscow";}
// 等同于:
echo $dt->serialize();  // O:13:"Carbon\Carbon":3:{s:4:"date";s:26:"2012-12-25 20:30:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/Moscow";}
$dt =  'O:13:"Carbon\Carbon":3:{s:4:"date";s:26:"2012-12-25 20:30:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/Moscow";}';
echo unserialize($dt)->format('Y-m-d\TH:i:s.uP T');  // 2012-12-25T20:30:00.000000+04:00 MSK
// 等同于:
echo Carbon::fromSerialized($dt)->format('Y-m-d\TH:i:s.uP T');  // 2012-12-25T20:30:00.000000+04:00 MSK

JSON

Carbon实例可以从JSON编码和解码(这些特性只能从PHP 5.4+中获得,参见下面关于PHP 5.3的注释)。

$dt =  Carbon::create(2012,  12,  25,  20,  30,  00,  'Europe/Moscow');
echo json_encode($dt);
// {"date":"2012-12-25 20:30:00.000000","timezone_type":3,"timezone":"Europe\/Moscow"}
$json =  '{"date":"2012-12-25 20:30:00.000000","timezone_type":3,"timezone":"Europe\/Moscow"}';
$dt =  Carbon::__set_state(json_decode($json,  true));
echo $dt->format('Y-m-d\TH:i:s.uP T');
// 2012-12-25T20:30:00.000000+04:00 MSK
您可以使用serializeUsing()自定义序列化。
$dt =  Carbon::create(2012,  12,  25,  20,  30,  00,  'Europe/Moscow');
    Carbon::serializeUsing(function  ($date)  {
    return $date->getTimestamp();
});
echo json_encode($dt);
/*
1356453000
*/
// Call serializeUsing with null to reset the serializer:
Carbon::serializeUsing(null);

jsonSerialize()方法返回中间通过“json_encode”将其转换为字符串,它还允许您使用PHP 5.3兼容性。

$dt =  Carbon::create(2012,  12,  25,  20,  30,  00,  'Europe/Moscow');
echo json_encode($dt->jsonSerialize());
// {"date":"2012-12-25 20:30:00.000000","timezone_type":3,"timezone":"Europe\/Moscow"}
// This is equivalent to the first json_encode example but works with PHP 5.3.
// And it can be used separately: 
 var_dump($dt->jsonSerialize());
  // array(3) {
 ["date"]=>
 string(26)  "2012-12-25 20:30:00.000000"
 ["timezone_type"]=>
 int(3)
["timezone"]=>
 string(13)  "Europe/Moscow"
 }

Macro

如果您习惯于使用Laravel和对象(如响应或集合),您可能熟悉这个宏概念。Carbon macro()的工作方式与Laravel宏特性相同,它将方法名作为第一个参数,闭包作为第二个参数。这使得闭包操作可以作为一个具有给定名称的方法在所有Carbon实例(也可以作为Carbon static方法)上使用。

在PHP 5.4中,$this可用于闭包中引用当前实例。对于PHP 5.3的兼容性,我们还向闭包添加了一个“$self”属性。例子:

Carbon::macro('diffFromYear',  function  ($year, $self =  null)  {
    // 这个块是为了在独立的Carbon上与PHP版本< 5.4和Laravel兼容 
    if  (!isset($self)  && isset($this))  {
        $self = $this;
    }
    //兼容性块的结束。 
    return $self->diffForHumans(Carbon::create($year,  1,  1,  0,  0,  0),  false,  false,  3);
});
 echo Carbon::parse('2020-01-12 12:00:00')->diffFromYear(2019);  // 1 year 1 week 4 days after

兼容性块允许您确保宏的完全兼容性。一个关于Illuminate\Support\Carbon (Laravel包装类)的宏将不会被定义,正如上面在PHP 5.3 $this中提到的,这个不会被定义。要使宏在任何地方都能工作,只需粘贴这个if语句测试如果它是定义的,而不是$self然后复制它,然后在函数体中使用$self

不管您是否省略了一些可选参数,只要$self有这个名称,并且是最后一个参数:

Carbon::macro('diffFromYear',  function  ($year, $absolute =  false, $short =  false, $parts =  1, $self =  null)  {
    // compatibility chunk 
    if  (!isset($self)  && isset($this))  {
        $self = $this;
    }
    return $self->diffForHumans(Carbon::create($year,  1,  1,  0,  0,  0), $absolute, $short, $parts);
});
echo Carbon::parse('2020-01-12 12:00:00')->diffFromYear(2019);  // 1 year after
echo Carbon::parse('2020-01-12 12:00:00')->diffFromYear(2019,  true);  // 1 year
echo Carbon::parse('2020-01-12 12:00:00')->diffFromYear(2019,  true,  true);  // 1yr
echo Carbon::parse('2020-01-12 12:00:00')->diffFromYear(2019,  true,  true,  5);  // 1yr 1w 4d 12h

还可以将宏分组到类中,并与mixin()一起应用

Class  BeerDayCarbonMixin
{
    public  function nextBeerDay()
    {
        return  function  ($self =  null)  {
            // compatibility chunk 
            if  (!isset($self)  && isset($this))  {
                $self = $this;
            }
            return $self->modify('next wednesday');
        };
    }
    public  function previousBeerDay()
    {
        return  function  ($self =  null)  {
            // compatibility chunk 
            if  (!isset($self)  && isset($this))  {
                $self = $this;
            }
            return $self->modify('previous wednesday');
        };
    }
}
Carbon::mixin(new  BeerDayCarbonMixin());
$date =  Carbon::parse('First saturday of December 2018');
echo $date->previousBeerDay();  // 2018-11-28 00:00:00
echo $date->nextBeerDay();  // 2018-12-05 00:00:00

您可以用hasMacro()检查是否可用宏(包括mixin)

var_dump(Carbon::hasMacro('previousBeerDay'));  // bool(true)
var_dump(Carbon::hasMacro('diffFromYear'));  // bool(true)
var_dump(Carbon::hasMacro('dontKnowWhat'));  // bool(false)

你猜怎么着?在CarbonInterval和CarbonPeriod类上也可以使用所有的宏方法。

CarbonInterval::macro('twice',  function  ($self =  null)  {
    return $self->times(2);
});
echo CarbonInterval::day()->twice()->forHumans();  // 2 days
echo CarbonInterval::hours(2)->minutes(15)->twice()->forHumans(true);  // 4h 30m
CarbonPeriod::macro('countWeekdays',  function  ($self =  null)  {
    return $self->filter('isWeekday')->count();
});
echo CarbonPeriod::create('2017-11-01',  '2017-11-30')->countWeekdays();  //
echo CarbonPeriod::create('2017-12-01',  '2017-12-31')->countWeekdays();  //

以下是社区提出的一些有用的宏:

Carbon::macro('isHoliday',  function  ($self =  null)  {
    // compatibility chunk 
    if  (!isset($self)  && isset($this))  {
        $self = $this;
    }
    return in_array($self->format('d/m'),  [
        '25/12',  // Christmas
        '01/01',  // New Year
        // ...
        ]);
    });
var_dump(Carbon::createMidnightDate(2012,  12,  25)->isHoliday());  // bool(true)
var_dump(Carbon::createMidnightDate(2017,  6,  25)->isHoliday());  // bool(false)
var_dump(Carbon::createMidnightDate(2021,  1,  1)->isHoliday());  // bool(true)

检查cmixin/业务日以获得更完整的业务日处理程序。

Class  CurrentDaysCarbonMixin
{
    /**
    * Get the all dates of week
    .  *
    * [[@return](https://learnku.com/users/31554)](https://learnku.com/users/31554) array
    */ 
    public  static  function getCurrentWeekDays()
    {
        return  function  ($self =  null)  {
            // compatibility chunk 
            if  (!isset($self)  && isset($this))  {
                $self = $this;
            }
            $startOfWeek =  ($self ?:  static::now())->startOfWeek()->subDay();
            $weekDays = array();
            for  ($i =  0; $i <  static::DAYS_PER_WEEK; $i++)  {
                $weekDays[]  = $startOfWeek->addDay()->startOfDay()->copy();
            }
        return $weekDays;
        };
    }
/**
 * Get the all dates of month
 *

 */ 
    public  static  function getCurrentMonthDays()
     {
        return  function  ($self =  null)  {
            // compatibility chunk 
            if  (!isset($self)  && isset($this))  {
                $self = $this;
            }
            $startOfMonth =  ($self ?:  static::now())->startOfMonth()->subDay();
            $endOfMonth =  ($self ?:  static::now())->endOfMonth()->format('d');
            $monthDays = array();
            for  ($i =  0; $i < $endOfMonth; $i++)
            {
                $monthDays[]  = $startOfMonth->addDay()->startOfDay()->copy();
            }
            return $monthDays;
            };
        }
    }
    Carbon::mixin(new  CurrentDaysCarbonMixin());
    function dumpDateList($dates)  {
    echo substr(implode(', ', $dates),  0,  100).'...';
 }
dumpDateList(Carbon::getCurrentWeekDays());  // 2018-07-02 00:00:00, 2018-07-03 00:00:00, 2018-07-04 00:00:00, 2018-07-05 00:00:00, 2018-07-06 00:00...
dumpDateList(Carbon::getCurrentMonthDays());  // 2018-07-01 00:00:00, 2018-07-02 00:00:00, 2018-07-03 00:00:00, 2018-07-04 00:00:00, 2018-07-05 00:00...
dumpDateList(Carbon::now()->subMonth()->getCurrentWeekDays());  // 2018-06-04 00:00:00, 2018-06-05 00:00:00, 2018-06-06 00:00:00, 2018-06-07 00:00:00, 2018-06-08 00:00...
dumpDateList(Carbon::now()->subMonth()->getCurrentMonthDays());  // 2018-06-01 00:00:00, 2018-06-02 00:00:00, 2018-06-03 00:00:00, 2018-06-04 00:00:00, 2018-06-05 00:00...
Carbon::macro('toAtomStringWithNoTimezone',  function  ($self =  null)  {
// compatibility chunk
if  (!isset($self)  && isset($this))  {
    $self = $this;
}
return $self->format('Y-m-d\TH:i:s');
});
echo Carbon::parse('2021-06-16 20:08:34')->toAtomStringWithNoTimezone();  // 2021-06-16T20:08:34
    *Credit: afrojuju1 (#1063).*
    Carbon::macro('easterDate',  function  ($year)  {
    return  Carbon::createMidnightDate($year,  3,  21)->addDays(easter_days($year));
});
echo Carbon::easterDate(2015)->format('d/m');  // 05/04
echo Carbon::easterDate(2016)->format('d/m');  // 27/03
echo Carbon::easterDate(2017)->format('d/m');  // 16/04
echo Carbon::easterDate(2018)->format('d/m');  // 01/04
echo Carbon::easterDate(2019)->format('d/m');  // 21/04

查看cmixin/工作日以获得更完整的假日处理程序。

Carbon::macro('range',  function  ($startDate, $endDate)  {
    return  new  DatePeriod($startDate,  new  DateInterval('P1D'), $endDate);
});
foreach  (Carbon::range(Carbon::createMidnightDate(2019,  3,  28),  Carbon::createMidnightDate(2019,  4,  3))  as $date)  {
    echo "$date\n";
}
/*
2019-03-28 00:00:00
2019-03-29 00:00:00
2019-03-30 00:00:00
2019-03-31 00:00:00
. 2019-04-01 00:00:00
2019-04-02 00:00:00
*/

class  UserTimezoneCarbonMixin
{
    public $userTimeZone;
    /**
    * Set user timezone, will be used before format function to apply current user timezone
    *
    * @param $timezone
    */ 
    public  function setUserTimezone()
    {
        $mixin = $this;
        return  function  ($timezone)  use  ($mixin)  {
            $mixin->userTimeZone = $timezone;
        };
    }
     /**
     * Returns date formatted according to given format.
     *
     * @param string $format
    . *
     *
     * @link http://php.net/manual/en/datetime.format.php
     */ 
    public  function tzFormat()
    {
        $mixin = $this;
        return  function  ($format, $self =  null)  use  ($mixin)  {
            // compatibility chunk 
            if  (!isset($self)  && isset($this))  {
                $self = $this;
            }
            if  (!is_null($mixin->userTimeZone))  {
                $self->timezone($mixin->userTimeZone);
            }
            return $self->format($format);
        };
    }
}
Carbon::mixin(new  UserTimezoneCarbonMixin());
Carbon::setUserTimezone('Europe/Berlin');
echo Carbon::createFromTime(12,  0,  0,  'UTC')->tzFormat('H:i');  // 14:00
echo Carbon::createFromTime(15,  0,  0,  'UTC')->tzFormat('H:i');  // 17:00
Carbon::setUserTimezone('America/Toronto');
echo Carbon::createFromTime(12,  0,  0,  'UTC')->tzFormat('H:i');  // 08:00
echo Carbon::createFromTime(15,  0,  0,  'UTC')->tzFormat('H:i');  // 11:00

CarbonInterval

CarbonInterval类继承了PHP DateInterval类。

<?php
class  CarbonInterval  extends \DateInterval
{
 // code here
}

你可以通过以下方式创建实例

echo CarbonInterval::year();  // 1 year
echo CarbonInterval::months(3);  // 3 months
echo CarbonInterval::days(3)->seconds(32);  // 3 days 32 seconds
echo CarbonInterval::weeks(3);  // 3 weeks
echo CarbonInterval::days(23);  // 3 weeks 2 days
echo CarbonInterval::create(2,  0,  5,  1,  1,  2,  7);  // 2 years 5 weeks 1 day 1 hour 2 minutes 7 seconds

如果您发现自己从另一个库继承了\DateInterval实例,不要害怕!您可以通过一个友好的instance()函数创建一个CarbonInterval实例。

$di =  new \DateInterval('P1Y2M');  // <== instance from another API
$ci =  CarbonInterval::instance($di);
echo get_class($ci);  // 'Carbon\CarbonInterval'
echo $ci;  // 1 year 2 months

其他的帮助程序,但是要注意实现提供了帮助程序来处理几周,但是只节省了几天。数周是根据当前实例的总天数计算的。

echo CarbonInterval::year()->years;  //
echo CarbonInterval::year()->dayz;  //
echo CarbonInterval::days(24)->dayz;  //
echo CarbonInterval::days(24)->daysExcludeWeeks;  //
echo CarbonInterval::weeks(3)->days(14)->weeks;  // 2  <-- days setter overwrites the current value
echo CarbonInterval::weeks(3)->weeks;  //
echo CarbonInterval::minutes(3)->weeksAndDays(2,  5);  // 2 weeks 5 days 3 minutes

CarbonInterval扩展DateInterval,您可以使用ISO-8601的持续时间格式创建这两种格式:

$ci =  CarbonInterval::create('P1Y2M3D');
$ci =  new  CarbonInterval('PT0S');

借助fromString()方法,可以从友好的字符串创建Carbon intervals。

CarbonInterval::fromString('2 minutes 15 seconds');
CarbonInterval::fromString('2m 15s');  // or abbreviated

注意这个月缩写为“mo”以区别于分钟和整个语法不区分大小写。

它还有一个方便的for human(),它被映射为__toString()实现,用于为人类打印间隔。

CarbonInterval::setLocale('fr');
echo CarbonInterval::create(2,  1)->forHumans();  // 2 ans 1 mois
echo CarbonInterval::hour()->seconds(3);  // 1 heure 3 secondes
CarbonInterval::setLocale('en');

如您所见,您可以使用CarbonInterval::setLocale(‘fr’)更改字符串的语言环境。

至于Carbon,您可以使用make方法从其他区间或字符串返回一个新的CarbonInterval实例:

 $dateInterval =  new  DateInterval('P2D');
$carbonInterval =  CarbonInterval::month();
echo CarbonInterval::make($dateInterval)->forHumans();  // 2 days 
echo CarbonInterval::make($carbonInterval)->forHumans();  // 1 month 
echo CarbonInterval::make('PT3H')->forHumans();  // 3 hours 
echo CarbonInterval::make('1h 15m')->forHumans();  // 1 hour 15 minutes
// Pass true to get short format 
echo CarbonInterval::make('1h 15m')->forHumans(true);  // 1h 15m

本机DateInterval分别添加和相乘,因此:

$interval =  CarbonInterval::make('7h 55m');
$interval->add(CarbonInterval::make('17h 35m'));
$interval->times(3);
echo $interval->forHumans();  // 72 hours 270 minutes

从单位到单位的输入中得到纯计算。将分钟级联成小时、小时级联成天等。使用级联方法:

echo $interval->forHumans();  // 72 hours 270 minutes
echo $interval->cascade()->forHumans();  // 3 days 4 hours 30 minutes

默认的因素有:

1分钟= 60

1小时=60分钟

1天=24小时

1周= 7

1个月= 4

1年= 12个月

CarbonIntervals 没有上下文,所以它们不能更精确(没有DST、没有闰年、没有实际的月长或年长)。但是你可以完全定制这些因素。例如处理工作时间日志:

$cascades =  CarbonInterval::getCascadeFactors();  // save initial factors 
CarbonInterval::setCascadeFactors(array(
    'minute'  => array(60,  'seconds')
    'hour'  => array(60,  'minutes'),
    'day'  => array(8,  'hours'),
    'week'  => array(5,  'days'),
    // in this example the cascade won't go farther than week unit
));
echo CarbonInterval::fromString('20h')->cascade()->forHumans();  // 2 days 4 hours 
echo CarbonInterval::fromString('10d')->cascade()->forHumans();  // 2 weeks 
echo CarbonInterval::fromString('3w 18d 53h 159m')->cascade()->forHumans();  // 7 weeks 4 days 7 hours 39 minutes 
// You can see currently set factors with getFactor: 
echo CarbonInterval::getFactor('minutes',  /* per */  'hour');  // 
echo CarbonInterval::getFactor('days',  'week');  // 5 
// And common factors can be get with short-cut methods: 
echo CarbonInterval::getDaysPerWeek();  //
echo CarbonInterval::getHoursPerDay();  // 
echo CarbonInterval::getMinutesPerHours();  //
echo CarbonInterval::getSecondsPerMinutes();  // 
CarbonInterval::setCascadeFactors($cascades);  // restore original factors

是否可能将间隔转换为给定的单元(使用提供的级联因子)。

echo CarbonInterval::days(3)->hours(5)->total('hours');  //
echo CarbonInterval::days(3)->hours(5)->totalHours;  //
echo CarbonInterval::months(6)->totalWeeks;  //
echo CarbonInterval::year()->totalDays;  //

您还可以使用spec()获得inverval的ISO 8601规范

echo CarbonInterval::days(3)->hours(5)->spec();  // P3DT5H

也可以从DateInterval对象获取它,因为它是静态助手:

echo CarbonInterval::getDateIntervalSpec(new  DateInterval('P3DT6M10S'));  // P3DT6M10S

使用compare()和comparedateinterval()方法可以对日期间隔列表进行排序:

$halfDay =  CarbonInterval::hours(12);
$oneDay =  CarbonInterval::day();
$twoDay =  CarbonInterval::days(2);
echo CarbonInterval::compareDateIntervals($oneDay, $oneDay);  //
echo $oneDay->compare($oneDay);  //
echo CarbonInterval::compareDateIntervals($oneDay, $halfDay);  //
echo $oneDay->compare($halfDay);  //
echo CarbonInterval::compareDateIntervals($oneDay, $twoDay);  // -1
echo $oneDay->compare($twoDay);  // -1
$list = array($twoDay, $halfDay, $oneDay);
usort($list, array('Carbon\CarbonInterval',  'compareDateIntervals'));
 echo implode(', ', $list);  // 12 hours, 1 day, 2 days

最后,通过使用互补参数调用toPeriod(),可以将一个CarbonInterval实例转换为一个CarbonPeriod实例。

我听到你问什么是CarbonPeriod 实例。哦!完美过渡到下一章。

CarbonPeriod

CarbonPeriod是一个友好的DatePeriod版本,具有许多快捷方式。

// Create a new instance:
$period =  new  CarbonPeriod('2018-04-21',  '3 days',  '2018-04-27');
// Use static constructor:
$period =  CarbonPeriod::create('2018-04-21',  '3 days',  '2018-04-27');
// Use the fluent setters:
$period =  CarbonPeriod::since('2018-04-21')->days(3)->until('2018-04-27');
// Start from a CarbonInterval:
$period =  CarbonInterval::days(3)->toPeriod('2018-04-21',  '2018-04-27');

CarbonPeriod可以通过多种方式构建:

开始日期、结束日期和可选间隔(默认为1天),

起始日期,递归次数和可选区间,

ISO 8601间隔规范。

日期可以是DateTime/Carbon实例,绝对字符串如“2007-10-15 15:00”或相对字符串,例如“next monday”。Interval可以作为DateInterval/CarbonInterval实例、ISO 8601的Interval规范(如“P4D”)或人类可读字符串(如“4 days”)给出。

默认构造函数和create()方法在参数类型和顺序方面都很容易理解,所以如果您想要更精确,建议使用fluent语法。另一方面,您可以将动态值数组传递给createFromArray(),它将使用给定的数组作为参数列表构造一个新实例。

CarbonPeriod实现迭代器接口。它意味着它可以直接传递给foreach循环:

$period =  CarbonPeriod::create('2018-04-21',  '3 days',  '2018-04-27');
foreach  ($period as $key => $date)  {
    if  ($key)  {
        echo ', ';
    }
    echo $date->format('m-d');
}
// 04-21, 04-24, 04-27
// Here is what happens under the hood:
$period->rewind();  // restart the iteration
while  ($period->valid())  {  // check if current item is valid 
    if  ($period->key())  {  // echo comma if current key is greater than 0 
        echo ', ';
    }
    echo $period->current()->format('m-d');  // echo current date 
    $period->next();  // move to the next item
}
// 04-21, 04-24, 04-27

参数可以在迭代过程中进行修改:

$period =  CarbonPeriod::create('2018-04-29',  7);
$dates = array();
foreach  ($period as $key => $date)  {
    if  ($key ===  3)  {
        $period->invert()->start($date);  // invert() is an alias for invertDateInterval()
    }
    $dates[]  = $date->format('m-d');
}
echo implode(', ', $dates);  // 04-29, 04-30, 05-01, 05-02, 05-01, 04-30, 04-29
和DatePeriod一样,CarbonPeriod也支持ISO 8601时间间隔规范。

请注意,本机日期周期将递归处理为多次重复间隔。因此,在排除开始日期时,它将减少一个结果。CarbonPeriod的自定义过滤器的引入使得知道结果的数量变得更加困难。由于这个原因,我们稍微改变了实现,递归被视为返回日期的总体限制。

// Possible options are: CarbonPeriod::EXCLUDE_START_DATE | CarbonPeriod::EXCLUDE_END_DATE
// Default value is 0 which will have the same effect as when no options are given.
$period =  CarbonPeriod::createFromIso('R4/2012-07-01T00:00:00Z/P7D',  CarbonPeriod::EXCLUDE_START_DATE);
$dates = array();
foreach  ($period as $date)  {
    $dates[]  = $date->format('m-d');
}
echo implode(', ', $dates);  // 07-08, 07-15, 07-22, 07-29

您可以从不同的getter中检索数据:

$period =  CarbonPeriod::create('2010-05-06',  '2010-05-25',  CarbonPeriod::EXCLUDE_START_DATE);
$exclude = $period->getOptions()  &  CarbonPeriod::EXCLUDE_START_DATE;
echo $period->getStartDate();  // 2010-05-06 00:00:00
echo $period->getEndDate();  // 2010-05-25 00:00:00
echo $period->getDateInterval();  // 1 day
echo $exclude ?  'exclude'  :  'include';  // exclude
var_dump($period->isStartExcluded());  // bool(true)
var_dump($period->isEndExcluded());  // bool(false)
echo $period->toString();  // Every 1 day from 2010-05-06 to 2010-05-25
echo $period;  /*implicit toString*/  // Every 1 day from 2010-05-06 to 2010-05-25

附加的getter允许您以数组的形式访问结果:

$period =  CarbonPeriod::create('2010-05-11',  '2010-05-13');
echo $period->count();  // 3, equivalent to count($period)
echo implode(', ', $period->toArray());  // 2010-05-11 00:00:00, 2010-05-12 00:00:00, 2010-05-13 00:00:00
echo $period->first();  // 2010-05-11 00:00:00
echo $period->last();  // 2010-05-13 00:00:00

注意,如果您打算使用上述函数,将toArray()调用的结果存储为变量并使用它是一个好主意,因为每个调用在内部执行一个完整的迭代。

想要更改参数,可以使用setter方法:

$period =  CarbonPeriod::create('2010-05-01',  '2010-05-14',  CarbonPeriod::EXCLUDE_END_DATE);
$period->setStartDate('2010-05-11');
echo implode(', ', $period->toArray());  // 2010-05-11 00:00:00, 2010-05-12 00:00:00, 2010-05-13 00:00:00
// Second argument can be optionally used to exclude the date from the results.
$period->setStartDate('2010-05-11',  false);
$period->setEndDate('2010-05-14',  true);
echo implode(', ', $period->toArray());  // 2010-05-12 00:00:00, 2010-05-13 00:00:00, 2010-05-14 00:00:00
$period->setRecurrences(2);
echo implode(', ', $period->toArray());  // 2010-05-12 00:00:00, 2010-05-13 00:00:00
$period->setDateInterval('PT12H');
echo implode(', ', $period->toArray());  // 2010-05-11 12:00:00, 2010-05-12 00:00:00

您可以使用setOptions()更改选项以替换所有选项,但也可以分别更改:

$period =  CarbonPeriod::create('2010-05-06',  '2010-05-25');
var_dump($period->isStartExcluded());  // bool(false)
var_dump($period->isEndExcluded());  // bool(false)
$period->toggleOptions(CarbonPeriod::EXCLUDE_START_DATE,  true);  // true, false or nothing to invert the option
var_dump($period->isStartExcluded());  // bool(true)
var_dump($period->isEndExcluded());  // bool(false) (unchanged)
$period->excludeEndDate();  // specify false to include, true or omit to exclude
var_dump($period->isStartExcluded());  // bool(true) (unchanged)
var_dump($period->isEndExcluded());  // bool(true)
$period->excludeStartDate(false);  // specify false to include, true or omit to exclude
var_dump($period->isStartExcluded());  // bool(false)
var_dump($period->isEndExcluded());  // bool(true)

如前所述,根据ISO 8601规范,递归是重复间隔的数倍。因此,本机DatePeriod将根据开始日期的排除而改变返回日期的数量。与此同时,CarbonPeriod在输入和允许自定义过滤器方面更加宽容,将递归作为返回日期的总体限制:

$period =  CarbonPeriod::createFromIso('R4/2012-07-01T00:00:00Z/P7D');
$days = array();
foreach  ($period as $date)  {
    $days[]  = $date->format('d');
}
echo $period->getRecurrences();  //
echo implode(', ', $days);  // 01, 08, 15, 22
$days = array();
$period->setRecurrences(3)->excludeStartDate();
foreach  ($period as $date)  {
    $days[]  = $date->format('d');
}
echo $period->getRecurrences();  //
echo implode(', ', $days);  // 08, 15, 22
$days = array();
$period =  CarbonPeriod::recurrences(3)->sinceNow();
foreach  ($period as $date)  {
    $days[]  = $date->format('Y-m-d');
}
echo implode(', ', $days);  // 2018-07-05, 2018-07-06, 2018-07-07

DatePeriod返回的日期可以很容易地过滤。例如,过滤器可以用于跳过某些日期或只在工作日或周末迭代。筛选函数应该返回true以接受日期,返回false以跳过日期,但继续搜索或CarbonPeriod::END_ITERATION以结束迭代。

$period =  CarbonPeriod::between('2000-01-01',  '2000-01-15');
$weekendFilter =  function  ($date)  {
    return $date->isWeekend();
};
$period->filter($weekendFilter);
$days = array();
foreach  ($period as $date)  {
    $days[]  = $date->format('m-d');
}
echo implode(', ', $days);  // 01-01, 01-02, 01-08, 01-09, 01-15

您还可以跳过循环中的一个或多个值。

$period =  CarbonPeriod::between('2000-01-01',  '2000-01-10');
$days = array();
foreach  ($period as $date)  {
    $day = $date->format('m-d');
    $days[]  = $day;
    if  ($day ===  '01-04')  {
        $period->skip(3);
    }
}
echo implode(', ', $days);  // 01-01, 01-02, 01-03, 01-04, 01-08, 01-09, 01-10

getFilters()

允许您在一个时间段内检索所有存储的过滤器。但是要注意递归限制和结束日期将出现在返回的数组中,因为它们作为过滤器存储在内部。

$period =  CarbonPeriod::end('2000-01-01')->recurrences(3);
var_export($period->getFilters());
  /*
  array (
  0 =>
  array (
  0 => 'Carbon\\CarbonPeriod::filterEndDate',
  1 => NULL,
  ),
 1 =>
 array (
 0 => 'Carbon\\CarbonPeriod::filterRecurrences',
1 => NULL,
 ),
 )
 */
过滤器存储在堆栈中,可以使用一组特殊的方法进行管理:
$period =  CarbonPeriod::between('2000-01-01',  '2000-01-15');

$weekendFilter = function ($date) {

    return $date->isWeekend();
};
var_dump($period->hasFilter($weekendFilter));  // bool(false)
$period->addFilter($weekendFilter);
var_dump($period->hasFilter($weekendFilter));  // bool(true)
$period->removeFilter($weekendFilter);
var_dump($period->hasFilter($weekendFilter));  // bool(false)
// To avoid storing filters as variables you can name your filters:
$period->prependFilter(function  ($date)  {
    return $date->isWeekend();
},  'weekend');
var_dump($period->hasFilter('weekend'));  // bool(true)
$period->removeFilter('weekend');
var_dump($period->hasFilter('weekend'));  // bool(false)

添加过滤器的顺序会对性能和结果产生影响,因此您可以使用addFilter()在堆栈末尾添加过滤器;您可以使用prependFilter()在开始时添加一个。甚至可以使用setfilter()替换所有的过滤器。请注意,您必须保持堆栈的正确格式,并记住关于递归限制和结束日期的内部过滤器。或者,您可以使用resetFilters()方法,然后逐个添加新的过滤器。

例如,当您添加一个限制尝试日期数量的自定义过滤器时,如果您在工作日过滤器之前或之后添加它,那么结果将是不同的。

// Note that you can pass a name of any Carbon method starting with "is", including macros
$period =  CarbonPeriod::between('2018-05-03',  '2018-05-25')->filter('isWeekday');
$attempts =  0;
$attemptsFilter =  function  ()  use  (&$attempts)  {
    return  ++$attempts <=  5  ?  true  :  CarbonPeriod::END_ITERATION;
};
$period->prependFilter($attemptsFilter,  'attempts');
$days = array();
foreach  ($period as $date)  {
    $days[]  = $date->format('m-d');
}
echo implode(', ', $days);  // 05-03, 05-04, 05-07
$attempts =  0;
$period->removeFilter($attemptsFilter)->addFilter($attemptsFilter,  'attempts');
$days = array();
foreach  ($period as $date)  {
    $days[]  = $date->format('m-d');
}
 echo implode(', ', $days);  // 05-03, 05-04, 05-07, 05-08, 05-09

注意,内置的递归过滤器不是这样工作的。相反,它基于当前键,每个条目只增加一次,无论在找到有效日期之前需要检查多少个日期。如果您将它放在堆栈的开头或末尾,那么这个技巧将使它的工作方式相同。

为了简化CarbonPeriod的构建,添加了一些别名:

// "start", "since", "sinceNow":
CarbonPeriod::start('2017-03-10')  ==  CarbonPeriod::create()->setStartDate('2017-03-10');
// Same with optional boolean argument $inclusive to change the option about include/exclude start date:
CarbonPeriod::start('2017-03-10',  true)  ==  CarbonPeriod::create()->setStartDate('2017-03-10',  true);
// "end", "until", "untilNow":
CarbonPeriod::end('2017-03-20')  ==  CarbonPeriod::create()->setEndDate('2017-03-20');
// Same with optional boolean argument $inclusive to change the option about include/exclude end date:
CarbonPeriod::end('2017-03-20',  true)  ==  CarbonPeriod::create()->setEndDate('2017-03-20',  true);
 // "dates", "between":
 CarbonPeriod::dates(...,  ...)  ==  CarbonPeriod::create()->setDates(...,  ...);
// "recurrences", "times":
CarbonPeriod::recurrences(5)  ==  CarbonPeriod::create()->setRecurrences(5);
 // "options":
CarbonPeriod::options(...)  ==  CarbonPeriod::create()->setOptions(...);
// "toggle":
CarbonPeriod::toggle(...,  true)  ==  CarbonPeriod::create()->toggleOptions(...,  true);
// "filter", "push":
CarbonPeriod::filter(...)  ==  CarbonPeriod::create()->addFilter(...);
// "prepend":
 CarbonPeriod::prepend(...)  ==  CarbonPeriod::create()->prependFilter(...);
// "filters":
CarbonPeriod::filters(...)  ==  CarbonPeriod::create()->setFilters(...);
// "interval", "each", "every", "step", "stepBy":
CarbonPeriod::interval(...)  ==  CarbonPeriod::create()->setDateInterval(...);
// "invert":
CarbonPeriod::invert()  ==  CarbonPeriod::create()->invertDateInterval();
// "year", "months", "month", "weeks", "week", "days", "dayz", "day",
// "hours", "hour", "minutes", "minute", "seconds", "second":
 CarbonPeriod::hours(5)  ==  CarbonPeriod::create()->setDateInterval(new  CarbonInterval::hours(5));

可以很容易地将CarbonPeriod转换为人类可读的字符串和ISO 8601规范:

$period =  CarbonPeriod::create('2000-01-01 12:00',  '3 days 12 hours',  '2000-01-15 12:00');
echo $period->toString();  // Every 3 days 12 hours from 2000-01-01 12:00:00 to 2000-01-15 12:00:00 
echo $period->toIso8601String();  // 2000-01-01T12:00:00-05:00/P3DT12H/2000-01-15T12:00:00-05:00