/** Diff two date objects. Only full units are returned */
public static function diff(TimeInterval $interval, Date $date1, Date $date2) : int
{
if ($date1->getOffsetInSeconds() != $date2->getOffsetInSeconds()) {
// Convert date2 to same timezone as date1. To work around PHP bug #45038,
// not just take the timezone of date1, but construct a new one which will
// have a timezone ID - which is required for this kind of computation.
$tz = new TimeZone(timezone_name_from_abbr('', $date1->getOffsetInSeconds(), $date1->toString('I')));
// Now, convert both dates to the same time (actually we only need to convert the
// second one, as the first will remain in the same timezone)
$date2 = $tz->translate($date2);
}
// Then cut off timezone, by setting both to GMT
$date1 = DateUtil::setTimeZone($date1, new TimeZone('GMT'));
$date2 = DateUtil::setTimeZone($date2, new TimeZone('GMT'));
switch ($interval) {
case TimeInterval::$YEAR:
return -($date1->getYear() - $date2->getYear());
case TimeInterval::$MONTH:
return -(($date1->getYear() - $date2->getYear()) * 12 + ($date1->getMonth() - $date2->getMonth()));
case TimeInterval::$DAY:
return -(intval($date1->getTime() / 86400) - intval($date2->getTime() / 86400));
case TimeInterval::$HOURS:
return -(intval($date1->getTime() / 3600) - intval($date2->getTime() / 3600));
case TimeInterval::$MINUTES:
return -(intval($date1->getTime() / 60) - intval($date2->getTime() / 60));
case TimeInterval::$SECONDS:
return -($date1->getTime() - $date2->getTime());
}
}
/**
* Move a date to a given timezone. Does not modify the date's
* actual value.
*
* @param util.Date date
* @param util.TimeZone tz
* @return util.Date
*/
public static function moveToTimezone(Date $date, TimeZone $tz)
{
return $tz->translate($date);
}
/**
* Format a date by the given strftime()-like format string.
*
* These format tokens are not supported intentionally:
* %a, %A, %b, %B, %c, %h, %p, %U, %x, %X
*
* @see php://strftime
* @param string format
* @param util.TimeZone outtz default NULL
* @return string
* @throws lang.IllegalArgumentException if unsupported token has been given
*/
public function format($format, TimeZone $outtz = NULL)
{
return preg_replace_callback('#%([a-zA-Z%])#', array($outtz === NULL ? $this : $outtz->translate($this), 'formatCallback'), $format);
}
