The 4th Annual China PHP Conference

DateTime::getTimestamp

DateTimeImmutable::getTimestamp

DateTimeInterface::getTimestamp

date_timestamp_get

(PHP 5 >= 5.3.0, PHP 7)

DateTime::getTimestamp -- DateTimeImmutable::getTimestamp -- DateTimeInterface::getTimestamp -- date_timestamp_getGets the Unix timestamp

Descrierea

Stil obiect-orientat

public int DateTime::getTimestamp ( void )
public int DateTimeImmutable::getTimestamp ( void )
public int DateTimeInterface::getTimestamp ( void )

Stil procedural

Gets the Unix timestamp.

Parametri

Această funcție nu are parametri.

Valorile întoarse

Returns the Unix timestamp representing the date.

Exemple

Example #1 DateTime::getTimestamp() example

Stil obiect-orientat

<?php
$date 
= new DateTime();
echo 
$date->getTimestamp();
?>

Stil procedural

<?php
$date 
date_create();
echo 
date_timestamp_get($date);
?>

Exemplele de mai sus vor afișa ceva similar cu:

1272509157

Note

Using U as the parameter to DateTime::format() is an alternative when using PHP 5.2.

A se vedea și

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User Contributed Notes 3 notes

up
24
Justin Heesemann
5 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();
?>
up
6
heiccih at gmail dot com
2 years ago
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.
up
0
miguelmuscat93 at gmail dot com
1 month 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)
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