DateTime::diff

DateTimeImmutable::diff

DateTimeInterface::diff

date_diff

(PHP 5 >= 5.3.0, PHP 7)

DateTime::diff -- DateTimeImmutable::diff -- DateTimeInterface::diff -- date_diff — Returns the difference between two DateTime objects

설명

객체 기반 형식

public DateInterval DateTime::diff ( DateTimeInterface $datetime2 [, bool $absolute = false ] )

public DateInterval DateTimeImmutable::diff ( DateTimeInterface $datetime2 [, bool $absolute = false ] )

public DateInterval DateTimeInterface::diff ( DateTimeInterface $datetime2 [, bool $absolute = false ] )

절차식 형식

DateInterval date_diff ( DateTimeInterface $datetime1 , DateTimeInterface $datetime2 [, bool $absolute = false ] )

Returns the difference between two DateTimeInterface objects.

인수

datetime: The date to compare to.
absolute: Should the interval be forced to be positive?

반환값

The DateInterval object representing the difference between the two dates실패 시 FALSE를 반환합니다.

예제

Example #1 DateTime::diff() example

객체 기반 형식


<?php
$datetime1 = new DateTime('2009-10-11');
$datetime2 = new DateTime('2009-10-13');
$interval = $datetime1->diff($datetime2);
echo $interval->format('%R%a days');
?>

절차식 형식


<?php
$datetime1 = date_create('2009-10-11');
$datetime2 = date_create('2009-10-13');
$interval = date_diff($datetime1, $datetime2);
echo $interval->format('%R%a days');
?>

위 예제들의 출력:

+2 days

Example #2 DateTime object comparison

Note:
As of PHP 5.2.2, 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);
?>

위 예제의 출력:

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

참고

DateInterval::format() - Formats the interval
DateTime::add() - Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object
DateTime::sub() - Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object