(PHP 5 >= 5.5.0, PHP 7, PHP 8)
DateTimeImmutable::setTimestamp — Sets the date and time based on a Unix timestamp
Returns a new DateTimeImmutable object constructed from the old one, with the date and time set based on an Unix timestamp.
timestamp
Unix timestamp representing the date.
Setting timestamps outside the range of int is possible by using
DateTimeImmutable::modify() with the @ format.
返回带有修改数据的新 DateTimeImmutable 对象。
示例 #1 DateTimeImmutable::setTimestamp() example
面向对象风格
<?php
$date = new DateTimeImmutable();
echo $date->format('U = Y-m-d H:i:s') . "\n";
$newDate = $date->setTimestamp(1171502725);
echo $newDate->format('U = Y-m-d H:i:s') . "\n";
?>以上示例的输出类似于：
1272508903 = 2010-04-28 22:41:43 1171502725 = 2007-02-14 20:25:25
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(); // 1693382400var_dump($usingAt === $origin); // falsevar_dump($usingSetTimestamp === $origin); // true