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<?php foreach (DateTimeZone::listIdentifiers() as $tz) { date_default_timezone_set($tz); $date1 = new \DateTime('2019-09-24 11:47:24'); $date2 = new \DateTime('2019-08-21 12:47:24'); $diff = $date1->diff($date2); if ($diff->h < 0) { echo $tz, PHP_EOL; } }
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