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@ 2014-10-19T23:10:46Z

<?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 / 2012-06-30)\n", $zone, $timezone->getName(), format_offset($offset), format_offset($offset2));
}

Output for git.master, git.master_jit, rfc.property-hooks: America/New_York (America/New_York) -0500 / -0400 (2012-01-01 / 2012-06-30) US/Eastern (US/Eastern) -0500 / -0400 (2012-01-01 / 2012-06-30) EDT (EDT) -0400 / -0400 (2012-01-01 / 2012-06-30) EST (EST) -0500 / -0500 (2012-01-01 / 2012-06-30)

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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