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<?php function timezoneExhibitsDST($tzId) { $tz = new DateTimeZone($tzId); $date = new DateTime("now",$tz); $trans = $tz->getTransitions(); foreach ($trans as $k => $t) if ($t["ts"] > $date->format('U')) { return $trans[$k-1]['isdst']; } } var_dump(timezoneExhibitsDST("Europe/London"));
Output for 7.3.24 - 7.3.33, 7.4.12 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
bool(true)
preferences:
107.93 ms | 403 KiB | 119 Q