In 32-bit system the unix timestamp will overflow if the date goes beyond year 2038 and this method will return false. In 64-bit systems this function will still work as intended. For more information please see http://en.wikipedia.org/wiki/Year_2038_problem.
DateTime::getTimestamp
DateTimeImmutable::getTimestamp
DateTimeInterface::getTimestamp
date_timestamp_get
(PHP 5 >= 5.3.0, PHP 7)
DateTime::getTimestamp -- DateTimeImmutable::getTimestamp -- DateTimeInterface::getTimestamp -- date_timestamp_get — Gets the Unix timestamp
Beschreibung
Objektorientierter Stil
public DateTime::getTimestamp
( void
) : int
public DateTimeImmutable::getTimestamp
( void
) : int
public DateTimeInterface::getTimestamp
( void
) : int
Prozeduraler Stil
Gets the Unix timestamp.
Parameter-Liste
Diese Funktion besitzt keine Parameter.
Rückgabewerte
Returns the Unix timestamp representing the date.
Beispiele
Beispiel #1 DateTime::getTimestamp() example
Objektorientierter Stil
<?php
$date = new DateTime();
echo $date->getTimestamp();
?>
Prozeduraler Stil
<?php
$date = date_create();
echo date_timestamp_get($date);
?>
Oben gezeigte Beispiele erzeugen eine ähnliche Ausgabe wie:
1272509157
Anmerkungen
Using U as the parameter to DateTime::format() is an alternative when using PHP 5.2.
Siehe auch
- DateTime::setTimestamp() - Legt Datum und Zeit basierend auf einem Unix-Zeitstempel fest
- DateTime::format() - Returns date formatted according to given format
add a note
User Contributed Notes 4 notes
heiccih at gmail dot com ¶
5 years ago
Justin Heesemann ¶
9 years ago
Note that for dates before the unix epoch getTimestamp() will return false, whereas format("U") will return a negative number.
<?php
$date = new DateTime("1899-12-31");
// "-2209078800"
echo $date->format("U");
// false
echo $date->getTimestamp();
?>
mindplay.dk ¶
3 years ago
Miguel's comment is wrong - getTimeStamp() always returns a timestamp, this has nothing to do with timezones at all, as you can see below.
What's really happening in Miguel's example, is he is parsing the input dates in different timezones.
There is no such thing as "a timestamp relative to the timezone".
<?php
$d = new DateTime('2016-03-11 11:00:00', new DateTimeZone('Europe/Rome'));
var_dump($d->getTimestamp()); // 1457690400
$d->setTimeZone(new DateTimeZone('America/New_York'));
var_dump($d->getTimestamp()); // 1457690400
miguelmuscat93 at gmail dot com ¶
3 years ago
Note that getTimestamp() does not return the UTC timestamp. It returns the timestamp relative to the set timezone, or the default server timezone. This also applies to dates in timezones with Daylight Savings.
<?php
// 11th March 2016 @ 11:00 UTC has timestamp: 1457694000
$d1 = new DateTime('2016-03-11 11:00:00', new DateTimeZone('Europe/Rome'));
$t1 = $d1->getTimestamp();
// 11th April 2016 @ 11:00 UTC has timestamp: 1460372400
$d2 = new DateTime('2016-04-11 11:00:00', new DateTimeZone('Europe/Rome'));
$t2 = $d2->getTimestamp();
printf("11 March: %d (diff = %d less)\n", $t1, 1457694000 - $t1);
printf("11 April: %d (diff = %d less)", $t2, 1460372400 - $t2);
// Prints:
// 1457690400 (diff = 3600)
// 1460365200 (diff = 7200)
