(PHP 5 >= 5.5.0, PHP 7, PHP 8)
DateTimeImmutable::setTimestamp — Establece la fecha y hora basadas en una marca de tiempo Unix
Igual que DateTime::setTimestamp() excepto que trabaja con DateTimeImmutable.
This function will not change the value of the DateTimeImmutable object as the method name might suggest. The object, after all, immutable.
<?php
$dti = new DateTimeImmutable();
echo $dti->getTimestamp(); // e.g. 123456789
$dti->setTimestamp(987654321);
echo $dti->getTimestamp(); // 123456789
$x = $dti->setTimestamp (987654321);
echo $x->getTimestamp(); // 987654321
?>While modifying Datetime with the timezone, the user should be aware that changing the timestamp using "@".\time() is not the same as changing the timestamp using setTimestamp().
$now = new \DateTimeImmutable('August 30, 2023 09:00:00 GMT+01');
$origin = $now->getTimestamp(); // 1693382400
$usingAt = $now->modify('@'.$now->getTimestamp())->getTimestamp(); // 1693378800
$usingSetTimestamp = $now->setTimestamp($now->getTimestamp())->getTimestamp(); // 1693382400
var_dump($usingAt === $origin); // false
var_dump($usingSetTimestamp === $origin); // true