(PHP 5 >= 5.3.0, PHP 7)
Returns the difference between two DateTime objects
public DateInterval DateTime::diff ( DateTimeInterface $datetime2 [, bool $absolute = false ] )
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?
Returns:
The DateInterval object representing the difference between the two dates or FALSE
on failure.
Examples:
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
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:
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