DateTime::diff

date_diff

(PHP 5 >= 5.3.0)

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

Opis

Styl obiektowy

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

Styl proceduralny

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

Returns the difference between two DateTime objects.

Parametry

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

Zwracane wartości

The DateInterval object representing the difference between the two dates lub FALSE w przypadku niepowodzenia.

Przykłady

Przykład #1 DateTime::diff() example

Styl obiektowy


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

Styl proceduralny


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

Powyższe przykłady wyświetlą:

+2 days

Przykład #2 DateTime object comparison

Informacja:
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);
?>

Powyższy przykład wyświetli:

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

Zobacz też:

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