DateTimeInterface::diff

DateTimeImmutable::diff

DateTime::diff

date_diff

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

DateTimeInterface::diff -- DateTimeImmutable::diff -- DateTime::diff -- date_diff ā€” Returns the difference between two DateTime objects

AƧıklama

Nesne yƶnelimli kullanım

public function DateTimeInterface::diff(DateTimeInterface $targetObject, bool $absolute = false): DateInterval
public function DateTimeImmutable::diff(DateTimeInterface $targetObject, bool $absolute = false): DateInterval
public function DateTime::diff(DateTimeInterface $targetObject, bool $absolute = false): DateInterval

Yordamsal kullanım

function date_diff(DateTimeInterface $baseObject, DateTimeInterface $targetObject, bool $absolute = false): DateInterval

Returns the difference between two DateTimeInterface objects.

Bağımsız Değişkenler

datetime

The date to compare to.

absolute

Should the interval be forced to be positive?

Dƶnen Değerler

The DateInterval object represents the difference between the two dates.

The absolute parameter only affects the invert property of a DateInterval object.

The return value more specifically represents the clock-time interval to apply to the original object ($this or $originObject) to arrive at the $targetObject. This process is not always reversible.

The method is aware of DST changeovers, and hence can return an interval of 24 hours and 30 minutes, as per one of the examples. If you want to calculate with absolute time, you need to convert both the $this/$baseObject, and $targetObject to UTC first.

Ɩrnekler

Ɩrnek 1 DateTimeImmutable::diff() example

Nesne yƶnelimli kullanım

<?php
$origin = new DateTimeImmutable('2009-10-11');
$target = new DateTimeImmutable('2009-10-13');
$interval = $origin->diff($target);
echo $interval->format('%R%a days');

Yukarıdaki ƶrneğin Ƨıktısı:

+2 days

Yordamsal kullanım

<?php
$origin = date_create('2009-10-11');
$target = date_create('2009-10-13');
$interval = date_diff($origin, $target);
echo $interval->format('%R%a days');

Yukarıdaki ƶrneğin Ƨıktısı:

+2 days

Ɩrnek 2 DateTimeInterface::diff() during DST changeover

<?php
$originalTime = new DateTimeImmutable("2021-10-30 09:00:00 Europe/London");
$targetTime = new DateTimeImmutable("2021-10-31 08:30:00 Europe/London");
$interval = $originalTime->diff($targetTime);
echo $interval->format("%H:%I:%S (Full days: %a)"), "\n";

Yukarıdaki ƶrneğin Ƨıktısı:

24:30:00 (Full days: 0)

Ɩrnek 3 DateTimeInterface::diff() range

The value that the method returns is the exact amount of time to get from $this to $targetObject. Comparing January 1st to December 31st returns therefore 364, and not 365, days (for non-leap years).

<?php
$originalTime = new DateTimeImmutable("2023-01-01 UTC");
$targetTime = new DateTimeImmutable("2023-12-31 UTC");
$interval = $originalTime->diff($targetTime);
echo "Full days: ", $interval->format("%a"), "\n";

Yukarıdaki ƶrneğin Ƨıktısı:

Full days: 364

Ɩrnek 4 DateTime object comparison

Bilginize:

DateTimeImmutable and DateTime objects can be compared using comparison operators.

<?php
$date1 = new DateTime("now");
$date2 = new DateTime("tomorrow");

var_dump($date1 == $date2);
var_dump($date1 < $date2);
var_dump($date1 > $date2);

Yukarıdaki ƶrneğin Ƨıktısı:

bool(false)
bool(true)
bool(false)

Ayrıca Bakınız

  • DateInterval::format() - Zaman aralığını biƧimler
  • DateTime::add() - Modifies a DateTime object, with added amount of days, months, years, hours, minutes and seconds
  • DateTime::sub() - Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object

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