<?php
/**
* @link http://stackoverflow.com/questions/26453510/datetimezone-and-utc-offset-for-standard-and-daylight-times
*/
/**
* @param $seconds
*
* @return string +\d\d\d\d / -\d\d\d\d
*/
function format_offset($seconds) {
$minutes = (int) ($seconds / 60);
$hours = (int) ($minutes / 60);
$leftover = abs($minutes - $hours * 60);
return sprintf("%+03d%02d", $hours, $leftover);
}
$zones = array('America/New_York', 'US/Eastern', 'EDT', 'EST');
foreach ($zones as $zone) {
// get offset
$timezone = new DateTimeZone($zone);
$offset = $timezone->getOffset(new DateTime('2012-01-01', $timezone));
$offset2 = $timezone->getOffset(new DateTime('2012-06-30', $timezone));
printf("%s (%s) %s / %s (2012-01-01 / 2012-06-03)\n", $zone, $timezone->getName(), format_offset($offset), format_offet($offset2));
}
preferences:
33.17 ms | 402 KiB | 5 Q