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DateTime::diff

Contents

DateTimeImmutable::diff

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DateTimeInterface::diff

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date_diff

(PHP 5 >= 5.3.0, PHP 7)

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

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Description

Object oriented style

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

Procedural style

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

Returns the difference between two DateTimeInterface objects.

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Parameters

datetime

The date to compare to.

absolute

Should the interval be forced to be positive?

PHP: DateTime::diff - Manual Home of Manuel PHP  Contents Haut

Return Values

The DateInterval object representing the difference between the two dates or FALSE on failure.

PHP: DateTime::diff - Manual Home of Manuel PHP  Contents Haut

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)

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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
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