/**
* Adds Seconds to a given UTC Timestamp.
* Respects Winter/Summertime, because of given Timezone of Event
* Returns UTC Timestamp
*
* @param integer $intUtcTimestamp
* @param integer $intSecondsToAdd
* @param string $strEventTimezone
* @return integer UTC Timestamp
*/
public function createRepeatableEvents($intUtcTimestamp, $intSecondsToAdd, $strEventTimezone = '')
{
$objTimeZone = $strEventTimezone === '' ? $this->userTimeZone : new DateTimeZone($strEventTimezone);
$objTime = new DateTimeLocale($this->helper_dtime($intUtcTimestamp), $objTimeZone);
$objTime->setTimezone($objTimeZone);
if ($intSecondsToAdd > 0) {
$objTime->add(new DateInterval("PT" . $intSecondsToAdd . "S"));
} else {
$objTime->sub(new DateInterval("PT" . $intSecondsToAdd . "S"));
}
return $objTime->format("U");
}
public function dateDiff($ts1, $ts2, $out = 'sec')
{
// Build the Dates
if (!is_numeric($ts1)) {
$dt1 = new DateTimeLocale($dt1, $this->userTimeZone);
$ts1 = $dt1->format('U');
}
if (!is_numeric($ts2)) {
$dt2 = new DateTimeLocale($dt2, $this->userTimeZone);
$ts2 = $dt2->format('U');
}
// calculate the difference
$secs['sec'] = 1;
$secs['min'] = 60;
$secs['hour'] = $secs['min'] * 60;
$secs['day'] = $secs['hour'] * 24;
$secs['week'] = $secs['day'] * 7;
$secs['month'] = $secs['day'] * 30;
$secs['year'] = $secs['day'] * 365;
return ($ts2 - $ts1 - ($ts2 - $ts1) % $secs[$out]) / $secs[$out];
}
