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<?php function timezoneExhibitsDST($tzId) { $tz = new DateTimeZone($tzId); $date = new DateTime("now",$tz); return $date->format('I'); /*$trans = $tz->getTransitions(); foreach ($trans as $k => $t) if ($t["ts"] > $date->format('U')) { print_r($t); print_r($trans[$k-1]); return $trans[$k-1]['isdst']; }*/ } var_dump(timezoneExhibitsDST("Europe/London"));
Output for 5.2.6
string(1) "1"