It should be noted above, be careful when manipulating the DateTime object with unix timestamps.
In the above examples you will get varying results dependent on your current timezone, method used, and version of PHP.
One would expect all of the examples above to perform the same as setTimestamp() or date('H:i', $timestamp); would.
<?php
date_default_timezone_set('America/New_York');
$ts = 1171502725;
?>
Set timestamp from UTC timezone use UTC timezone
<?php
$date = new DateTime("@$ts");
var_dump($date->format('Y-m-d H:i:s e'));
/*
string(26) "2007-02-15 01:25:25 +00:00" //PHP 5.3.0 - 5.6.8
*/
?>
To convert the above to use the current timezone simply use
<?php
$date->setTimezone(date_default_timezone_get());
//string(36) "2007-02-14 20:25:25 America/New_York"
?>
Set the timestamp from UTC timezone use current timezone
<?php
$date = new DateTime;
$date->modify('@' . $ts);
var_dump($date->format('Y-m-d H:i:s e'));
/*
string(36) "2007-02-15 01:25:25 America/New_York" //PHP 5.3.6 - 5.6.8
string(36) "2052-06-20 18:53:24 America/New_York" //PHP 5.3.0 - 5.3.5
*/
?>
Set the timestamp from current timezone use current timezone
<?php
$date = new DateTime;
$date->setTimestamp($ts);
var_dump($date->format('Y-m-d H:i:s e'));
/*
string(36) "2007-02-14 20:25:25 America/New_York" //PHP 5.3.0 - 5.6.8
*/
?>
DateTime::setTimestamp
date_timestamp_set
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
DateTime::setTimestamp -- date_timestamp_set — Legt Datum und Zeit basierend auf einem Unix-Zeitstempel fest
Beschreibung
Objektorientierter Stil
Prozeduraler Stil
Legt Datum und Zeit basierend auf einem Unix-Zeitstempel fest.
Wie DateTimeImmutable::setTimestamp(), verwendet aber DateTime.
Die prozedurale Version verwendet das DateTime-Objekt als ersten Parameter.
Parameter-Liste
-
object -
Nur bei prozeduralem Aufruf: Ein von date_create() zurückgegebenes DateTime-Objekt. Diese Funktion verändert dieses Objekt.
-
timestamp -
Ein Unix-Zeitstempel, der das Datum angibt. Es ist möglich, Zeitstempel außerhalb des Bereichs von Integer zu setzen, indem man DateTimeImmutable::modify() mit dem
@-Format verwendet.
Rückgabewerte
Gibt das geänderte DateTime-Objekt für die Methodenverkettung zurück.
Siehe auch
- DateTimeImmutable::setTimestamp() - Legt das Datum und die Uhrzeit basierend auf einem Unix-Zeitstempel fest
add a note
User Contributed Notes 4 notes
admin at torntech dot com ¶
9 years ago
Arnb ¶
11 years ago
When you need to manipulate a unix timestamp like field (seconds since 1970-01-01) that may be greater than the drop dead date of 2038-01-19.
<?php
function secs2date($secs,$date)
{
if ($secs>2147472000) //2038-01-19 expire dt
{
$date->setTimestamp(2147472000);
$s=$secs-2147472000;
$date->add(new DateInterval('PT'.$s.'S'));
}
else
$date->setTimestamp($secs);
}
function date2secs($date,$datebeg)
{
$diff = $datebeg->diff($date);
$secs=$diff->format('%a') * (60*60*24); //total days
$secs+=$diff->format('%h') * (60*60); //hours
$secs+=$diff->format('%i') * 60; //minutes
$secs+=$diff->format('%s'); //seconds
return $secs;
}
$datebeg = new DateTime('1970-01-01');
$date=new dateTime();
$secs=2017472000; //2033-12-06 08:53:20
secs2date($secs,$date);
$dt=$date->format('Y-m-d H:i:s');
echo $dt."<br>";
$sec2=date2secs($date,$datebeg);
echo '(1) ',$sec2,'***',$secs,'<br>';
$secs=2397472000; //2045-12-21 12:26:40
secs2date($secs,$date);
$dt=$date->format('Y-m-d H:i:s');
echo $dt."<br>";
$sec2=date2secs($date,$datebeg);
echo '(2) ',$sec2,'***',$secs,'<br>';
?>
Use Web Form at Aouie.net ¶
14 years ago
When the exact time is important then it is important to note the difference between this and the UnixTimeStamp. The function will change the timestamp if necessary to take into account the daylight savings time.
e.g. Working with the 'Europe/London' timezone and setting the DateTime object to a timestamp of 1288486753 will result in the function automatically altering it to 1288490353.
This is because it is taking the fall time instead of the summer time (they will both be Sun, 31-Oct-2010 01:X:Y (I didn't check the hour and minute)).
Sincerely,
Aouie
linblow at hotmail dot fr ¶
13 years ago
If your PHP version is lower than 5.3 then you can use this class to be able to use the functions "setTimestamp" and "getTimestamp":
<?php
class MyDateTime extends DateTime
{
public function setTimestamp( $timestamp )
{
$date = getdate( ( int ) $timestamp );
$this->setDate( $date['year'] , $date['mon'] , $date['mday'] );
$this->setTime( $date['hours'] , $date['minutes'] , $date['seconds'] );
}
public function getTimestamp()
{
return $this->format( 'U' );
}
}
$date = new MyDateTime();
$date->setTimestamp( $someTimestamp );
echo $date->format( 'd/m/Y H:i:s' );
?>
