How to create a DateTime from a DateTimeInterface in PHP?

Question

This is a rather simple question, but I couldn't really find an answer on the Internet.

So suppose, in PHP, I have an instance of a DateTimeInterface, and I need a DateTime for the same moment in time. What is the preferred way to do so? Conversion via a string seems rather convoluted, and I'm not sure which format to use. Maybe via the timestamp? I'm not sure if this will work when timezones are involved.

Answer 1

In PHP 8: createFromInterface:

$dateTime = DateTime::createFromInterface($dateTimeInterface);

Answer 2

In you are in PHP 7 (and maybe even earlier), this little helper class can do the trick for you:

class DateTimeConverter
{
    public static function mutableFromInterface(\DateTimeInterface $dateTimeInterface): \DateTime
    {
        return new \DateTime('@'.$dateTimeInterface->getTimestamp(), $dateTimeInterface->getTimezone());
    }
}