<?php

$tz = new DateTimezone('Europe/Berlin');

$dt = new DateTime();
$dt->setTimezone($tz);

echo '<b>available datetime formats</b>' . PHP_EOL;

echo $dt->format(DateTime::ATOM) . PHP_EOL;
echo $dt->format(DateTime::COOKIE) . PHP_EOL;
echo $dt->format(DateTime::RSS) . PHP_EOL;
echo $dt->format(DateTime::W3C) . PHP_EOL;

echo $dt->format(DateTime::ISO8601) . PHP_EOL;
echo $dt->format(DateTime::RFC822) . PHP_EOL;
echo $dt->format(DateTime::RFC850) . PHP_EOL;
echo $dt->format(DateTime::RFC1036) . PHP_EOL;
echo $dt->format(DateTime::RFC1123) . PHP_EOL;
echo $dt->format(DateTime::RFC2822) . PHP_EOL;
echo $dt->format(DateTime::RFC3339) . PHP_EOL . PHP_EOL;

echo '<b>create DateTime from a string with predefined format</b>' . PHP_EOL;

$dt = DateTime::createFromFormat(
    DateTime::RSS,
    'Sat, 04 Oct 2014 14:38:40 +0200'
);

dump($dt);



available datetime formats
2021-09-20T16:38:07+02:00
Monday, 20-Sep-2021 16:38:07 CEST
Mon, 20 Sep 2021 16:38:07 +0200
2021-09-20T16:38:07+02:00
2021-09-20T16:38:07+0200
Mon, 20 Sep 21 16:38:07 +0200
Monday, 20-Sep-21 16:38:07 CEST
Mon, 20 Sep 21 16:38:07 +0200
Mon, 20 Sep 2021 16:38:07 +0200
Mon, 20 Sep 2021 16:38:07 +0200
2021-09-20T16:38:07+02:00

create DateTime from a string with predefined format

^ DateTime @1412426320 {#1392

  date: 2014-10-04 14:38:40.0 +02:00

}

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PHP 8.0, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8