(PHP 5 >= 5.3.0, PHP 7)
DateTime::diff -- DateTimeImmutable::diff -- DateTimeInterface::diff -- date_diff — Returns the difference between two DateTime objects
Objektorientierter Stil
$datetime2
[, bool $absolute
= false
] )$datetime2
[, bool $absolute
= false
] )Prozeduraler Stil
$datetime1
, DateTimeInterface $datetime2
[, bool $absolute
= false
] )Returns the difference between two DateTimeInterface objects.
datetime
The date to compare to.
absolute
Should the interval be forced to be positive?
The DateInterval object representing the
difference between the two datesIm Fehlerfall wird FALSE
zurückgegeben..
Beispiel #1 DateTime::diff() example
Objektorientierter Stil
<?php
$datetime1 = new DateTime('2009-10-11');
$datetime2 = new DateTime('2009-10-13');
$interval = $datetime1->diff($datetime2);
echo $interval->format('%R%a days');
?>
Prozeduraler Stil
<?php
$datetime1 = date_create('2009-10-11');
$datetime2 = date_create('2009-10-13');
$interval = date_diff($datetime1, $datetime2);
echo $interval->format('%R%a days');
?>
Die obigen Bespiele erzeugen folgende Ausgabe:
+2 days
Beispiel #2 DateTime object comparison
Hinweis:
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);
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
bool(false) bool(true) bool(false)