Datetime conversion methods. Convert server datetime to UTC and convert UTC to server datetime.

datetimeConvert

/**
 * Datetime conversion methods. Convert server datetime to UTC and convert UTC to server datetime.
 * @author https://gist.github.com/dirte/
 * @version 1.0.1
 * @category DateTime
 */

/**
 * datetimeConvertServerToUTC
 *
 * @example $utc = datetimeConvertServerToUTC();
 * @return date UTC datetime of NOW in format YYYY-MM-DD HH:MM:SS
 * @todo optional param for desired timezone to convert server value to
 * @todo optional param for desired return datetime format
 */
function datetimeConvertServerToUTC() {
	return $gmdate = gmdate("Y-m-d H:i:s");
}

/**
 * datetimeConvertUTCToServer
 *
 * @example datetimeConvertUTCToServer($utc);
 * @var timezone Default timezone to use if server datetime not configured in php.ini
 * @param date $utcDatetime UTC datetime
 * @return date $serverDatetime
 * @todo optional param for desired timezone to convert UTC value to
 * @todo optional param for desired return datetime format
 */
function datetimeConvertUTCToServer($utcDatetime) {
    // Attempt to use date.timezone declared in servers php.ini
    $TZ = ini_get('date.timezone');
    // Manually set our own timezone if server does not declare a default
    if (empty($TZ)):
        $TZ = new DateTimeZone('America/New_York');
    endif;
    // UTC DateTime
    $utcDatetime = new DateTime($utcDatetime, new DateTimeZone('UTC'));
    // Converted UTC DateTime to Server DateTime
    $serverDatetime = clone $utcDatetime;
    $serverDatetime->setTimezone($TZ);
	return $serverDatetime->format("Y-m-d H:i:s");
}

/**
 * Example usage:
 */
$utc = datetimeConvertServerToUTC();
echo 'datetimeConvertServerToUTC(): '.$utc.'<hr />';
echo 'datetimeConvertUTCToServer(): '.datetimeConvertUTCToServer($utc);