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DateTimeImmutable::__construct

date_create_immutable

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

DateTimeImmutable::__construct -- date_create_immutable — Returns new DateTimeImmutable object

Description

Object-oriented style

public DateTimeImmutable::__construct(string $datetime = "now", ?DateTimeZone $timezone = null)

Procedural style

date_create_immutable(string $datetime = "now", ?DateTimeZone $timezone = null): DateTimeImmutable|false

Returns new a DateTimeImmutable object.

Parameters

datetime

A date/time string. Valid formats are explained in Date and Time Formats.

Enter "now" here to obtain the current time when using the $timezone parameter.

timezone

A DateTimeZone object representing the timezone of $datetime.

If $timezone is omitted or null, the current timezone will be used.

Note:
The $timezone parameter and the current timezone are ignored when the $datetime parameter either is a UNIX timestamp (e.g. @946684800) or specifies a timezone (e.g. 2010-01-28T15:00:00+02:00, or 2010-07-05T06:00:00Z).

Return Values

Returns a new DateTimeImmutable instance. Procedural style returns false on failure.

Errors/Exceptions

Emits Exception in case of an error.

Changelog

Version	Description
7.1.0	From now on microseconds are filled with actual value. Not with '00000'.

Examples

Example #1 DateTimeImmutable::__construct() example

Object-oriented style

<?php
try {
    $date = new DateTimeImmutable('2000-01-01');
} catch (Exception $e) {
    echo $e->getMessage();
    exit(1);
}

echo $date->format('Y-m-d');
?>

Procedural style

<?php
$date = date_create('2000-01-01');
if (!$date) {
    $e = date_get_last_errors();
    foreach ($e['errors'] as $error) {
        echo "$error\n";
    }
    exit(1);
}

echo date_format($date, 'Y-m-d');
?>

The above examples will output:

2000-01-01

Example #2 Intricacies of DateTimeImmutable::__construct()

<?php
// Specified date/time in your computer's time zone.
$date = new DateTimeImmutable('2000-01-01');
echo $date->format('Y-m-d H:i:sP') . "\n";

// Specified date/time in the specified time zone.
$date = new DateTimeImmutable('2000-01-01', new DateTimeZone('Pacific/Nauru'));
echo $date->format('Y-m-d H:i:sP') . "\n";

// Current date/time in your computer's time zone.
$date = new DateTimeImmutable();
echo $date->format('Y-m-d H:i:sP') . "\n";

// Current date/time in the specified time zone.
$date = new DateTimeImmutable('now', new DateTimeZone('Pacific/Nauru'));
echo $date->format('Y-m-d H:i:sP') . "\n";

// Using a UNIX timestamp.  Notice the result is in the UTC time zone.
$date = new DateTimeImmutable('@946684800');
echo $date->format('Y-m-d H:i:sP') . "\n";

// Non-existent values roll over.
$date = new DateTimeImmutable('2000-02-30');
echo $date->format('Y-m-d H:i:sP') . "\n";
?>

The above example will output something similar to:

2000-01-01 00:00:00-05:00
2000-01-01 00:00:00+12:00
2010-04-24 10:24:16-04:00
2010-04-25 02:24:16+12:00
2000-01-01 00:00:00+00:00
2000-03-01 00:00:00-05:00

Example #3 Changing the associated timezone

<?php
$timeZone = new \DateTimeZone('Asia/Tokyo');

$time = new \DateTimeImmutable();
$time = $time->setTimezone($timeZone);

echo $time->format('Y/m/d H:i:s'), "\n";
?>

The above example will output something similar to:

2022/08/12 23:49:23

Example #4 Using a relative date/time string

<?php
$time = new \DateTimeImmutable("-1 year");

echo $time->format('Y/m/d H:i:s'), "\n";
?>

The above example will output something similar to:

2021/08/12 15:43:51

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User Contributed Notes 1 note

down

Dmitrii ¶

1 year ago

"If $timezone is omitted or null, the current timezone will be used." - note, that timezone IS NOT equal offset, if its important for your application.

If default timezone = Europe/Moscow, then:
echo (new \DateTimeImmutable('2014-10'))->format(DATE_ATOM); // gives "2014-10-01T00:00:00+04:00"
echo (new \DateTimeImmutable('2014-11'))->format(DATE_ATOM); // gives "2014-11-01T00:00:00+03:00"
because of law changes (abolition of "summer time").

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