Online PHP editor | output for WZv34

<?php final class Rfc7231Formatter { public static function format(DateTimeImmutable $dt): string { return $dt->setTimezone(new DateTimeZone('GMT'))->format('D, d M Y H:i:s') . ' GMT'; } } echo Rfc7231Formatter::format(new DateTimeImmutable('2026-01-21 12:23:34.567890+01:00')); echo PHP_EOL; echo Rfc7231Formatter::format(new DateTimeImmutable('2026-01-21 12:23:34.567890-08:00'));