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<?php $date = new \DateTime('now', new \DateTimeZone('UTC')); $currentHour = (int)$date->format('G'); var_dump($currentHour);
Output for 8.1.34, 8.2.29 - 8.2.30, 8.3.5 - 8.3.30, 8.4.8 - 8.4.18, 8.5.0 - 8.5.3
int(19)

preferences:
55.41 ms | 602 KiB | 4 Q