DateTime::diff
DateTimeImmutable::diff
DateTimeInterface::diff
date_diff
(PHP 5 >= 5.3.0)
DateTime::diff -- DateTimeImmutable::diff -- DateTimeInterface::diff -- date_diff — Returns the difference between two DateTime objects
Description
Object oriented style
public DateInterval DateTimeImmutable::diff
( DateTimeInterface
$datetime2
[, bool $absolute = false
] )
public DateInterval DateTimeInterface::diff
( DateTimeInterface
$datetime2
[, bool $absolute = false
] )Procedural style
DateInterval date_diff
( DateTimeInterface
$datetime1
, DateTimeInterface $datetime2
[, bool $absolute = false
] )Returns the difference between two DateTimeInterface objects.
Parameters
-
datetime -
The date to compare to.
-
absolute -
Should the interval be forced to be positive?
Return Values
The DateInterval object representing the
difference between the two dates or FALSE on failure.
Examples
Example #1 DateTime::diff() example
Object oriented style
<?php
$datetime1 = new DateTime('2009-10-11');
$datetime2 = new DateTime('2009-10-13');
$interval = $datetime1->diff($datetime2);
echo $interval->format('%R%a days');
?>
Procedural style
<?php
$datetime1 = date_create('2009-10-11');
$datetime2 = date_create('2009-10-13');
$interval = date_diff($datetime1, $datetime2);
echo $interval->format('%R%a days');
?>
The above examples will output:
+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);
?>
The above example will output:
bool(false) bool(true) bool(false)
See Also
- 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
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с датой и временем
- Дата и Время
- Функция DateTime::diff() - Возвращает разницу между двумя DateTime объектами
- Функция DateTime::format() - Возвращает дату, отформатированную согласно переданному формату
- Функция DateTime::getOffset() - Возвращает смещение часовой зоны
- Функция DateTime::getTimestamp() - Возвращает временную метку Unix
- Функция DateTime::getTimezone() - Возвращает часовую зону относительно текущему значению DateTime
- Функция DateTime::__wakeup() - Обработчик __wakeup
Коментарии
DateTimeImmutable and DateTime objects can be compared using comparison operators, however `==` and `===` produce different results:
<?php
var_dump(new DateTimeImmutable('2012-10-10') === new DateTimeImmutable('2012-10-10'));
// false
?>
BUT:
<?php
var_dump(new DateTimeImmutable('2012-10-10') == new DateTimeImmutable('2012-10-10'));
// true
?>