/**
* Returns the date the specified no of seconds from the given date
*
* If leap seconds are specified to be counted, the passed time must be UTC.
* To subtract seconds use a negative value for the '$pn_seconds' parameter.
*
* N.B. the return type of the second part of the date is float if
* either '$pn_seconds' or '$pn_second' is a float; otherwise, it
* is integer.
*
* @param mixed $pn_seconds seconds to add as integer or float
* @param int $pn_day the day of the month
* @param int $pn_month the month
* @param int $pn_year the year
* @param int $pn_hour the hour
* @param int $pn_minute the minute
* @param mixed $pn_second the second as integer or float
* @param bool $pb_countleap whether to count leap seconds (defaults to
* DATE_COUNT_LEAP_SECONDS)
*
* @return array array of year, month, day, hour, minute, second
* @access public
* @static
* @since Method available since Release 1.5.0
*/
function addSeconds($pn_seconds, $pn_day, $pn_month, $pn_year, $pn_hour, $pn_minute, $pn_second, $pb_countleap = DATE_COUNT_LEAP_SECONDS)
{
if ($pn_seconds == 0) {
return array((int) $pn_year, (int) $pn_month, (int) $pn_day, (int) $pn_hour, (int) $pn_minute, $pn_second);
}
if ($pb_countleap) {
$hn_seconds = $pn_seconds;
$hn_day = (int) $pn_day;
$hn_month = (int) $pn_month;
$hn_year = (int) $pn_year;
$hn_hour = (int) $pn_hour;
$hn_minute = (int) $pn_minute;
$hn_second = $pn_second;
$hn_days = Date_Calc::dateToDays($pn_day, $pn_month, $pn_year);
$hn_secondsofmonth = 86400 * ($hn_days - Date_Calc::firstDayOfMonth($pn_month, $pn_year)) + Date_Calc::secondsPastMidnight($pn_hour, $pn_minute, $pn_second);
if ($hn_seconds > 0) {
// Advance to end of month:
//
if ($hn_secondsofmonth != 0 && $hn_secondsofmonth + $hn_seconds >= ($hn_secondsinmonth = Date_Calc::getSecondsInMonth($hn_month, $hn_year))) {
$hn_seconds -= $hn_secondsinmonth - $hn_secondsofmonth;
$hn_secondsofmonth = 0;
list($hn_year, $hn_month) = Date_Calc::nextMonth($hn_month, $hn_year);
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
$hn_hour = $hn_minute = $hn_second = 0;
}
// Advance to end of year:
//
if ($hn_secondsofmonth == 0 && $hn_month != Date_Calc::getFirstMonthOfYear($hn_year)) {
while ($hn_year == $pn_year && $hn_seconds >= ($hn_secondsinmonth = Date_Calc::getSecondsInMonth($hn_month, $hn_year))) {
$hn_seconds -= $hn_secondsinmonth;
list($hn_year, $hn_month) = Date_Calc::nextMonth($hn_month, $hn_year);
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
}
}
if ($hn_secondsofmonth == 0) {
// Add years:
//
if ($hn_month == Date_Calc::getFirstMonthOfYear($hn_year)) {
while ($hn_seconds >= ($hn_secondsinyear = Date_Calc::getSecondsInYear($hn_year))) {
$hn_seconds -= $hn_secondsinyear;
$hn_month = Date_Calc::getFirstMonthOfYear(++$hn_year);
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
}
}
// Add months:
//
while ($hn_seconds >= ($hn_secondsinmonth = Date_Calc::getSecondsInMonth($hn_month, $hn_year))) {
$hn_seconds -= $hn_secondsinmonth;
list($hn_year, $hn_month) = Date_Calc::nextMonth($hn_month, $hn_year);
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
}
}
} else {
//
// (if $hn_seconds < 0)
// Go back to start of month:
//
if ($hn_secondsofmonth != 0 && -$hn_seconds >= $hn_secondsofmonth) {
$hn_seconds += $hn_secondsofmonth;
$hn_secondsofmonth = 0;
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
$hn_hour = $hn_minute = $hn_second = 0;
}
// Go back to start of year:
//
if ($hn_secondsofmonth == 0) {
while ($hn_month != Date_Calc::getFirstMonthOfYear($hn_year)) {
list($hn_year, $hn_prevmonth) = Date_Calc::prevMonth($hn_month, $hn_year);
if (-$hn_seconds >= ($hn_secondsinmonth = Date_Calc::getSecondsInMonth($hn_prevmonth, $hn_year))) {
$hn_seconds += $hn_secondsinmonth;
$hn_month = $hn_prevmonth;
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
} else {
break;
}
}
}
if ($hn_secondsofmonth == 0) {
// Subtract years:
//
if ($hn_month == Date_Calc::getFirstMonthOfYear($hn_year)) {
while (-$hn_seconds >= ($hn_secondsinyear = Date_Calc::getSecondsInYear($hn_year - 1))) {
$hn_seconds += $hn_secondsinyear;
$hn_month = Date_Calc::getFirstMonthOfYear(--$hn_year);
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
}
}
// Subtract months:
//
list($hn_pmyear, $hn_prevmonth) = Date_Calc::prevMonth($hn_month, $hn_year);
while (-$hn_seconds >= ($hn_secondsinmonth = Date_Calc::getSecondsInMonth($hn_prevmonth, $hn_pmyear))) {
$hn_seconds += $hn_secondsinmonth;
$hn_year = $hn_pmyear;
$hn_month = $hn_prevmonth;
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
list($hn_pmyear, $hn_prevmonth) = Date_Calc::prevMonth($hn_month, $hn_year);
}
}
}
if ($hn_seconds < 0 && $hn_secondsofmonth == 0) {
list($hn_year, $hn_month) = Date_Calc::prevMonth($hn_month, $hn_year);
$hn_day = Date_Calc::getFirstDayOfMonth($hn_month, $hn_year);
$hn_seconds += Date_Calc::getSecondsInMonth($hn_month, $hn_year);
}
$hn_seconds += Date_Calc::secondsPastMidnight($hn_hour, $hn_minute, $hn_second);
if ($hn_seconds < 0) {
$hn_daysadd = intval($hn_seconds / 86400) - 1;
} else {
if ($hn_seconds < 86400) {
$hn_daysadd = 0;
} else {
$hn_daysadd = intval($hn_seconds / 86400) - 1;
}
}
if ($hn_daysadd != 0) {
list($hn_year, $hn_month, $hn_day) = explode(" ", Date_Calc::addDays($hn_daysadd, $hn_day, $hn_month, $hn_year, "%Y %m %d"));
$hn_seconds -= $hn_daysadd * 86400;
}
$hn_secondsinday = Date_Calc::getSecondsInDay($hn_day, $hn_month, $hn_year);
if ($hn_seconds >= $hn_secondsinday) {
list($hn_year, $hn_month, $hn_day) = explode(" ", Date_Calc::addDays(1, $hn_day, $hn_month, $hn_year, "%Y %m %d"));
$hn_seconds -= $hn_secondsinday;
}
list($hn_hour, $hn_minute, $hn_second) = Date_Calc::secondsPastMidnightToTime($hn_seconds);
return array((int) $hn_year, (int) $hn_month, (int) $hn_day, $hn_hour, $hn_minute, $hn_second);
} else {
// Assume every day has 86400 seconds exactly (ignore leap seconds):
//
$hn_minutes = intval($pn_seconds / 60);
if (is_float($pn_seconds)) {
$hn_second = $pn_second + fmod($pn_seconds, 60);
} else {
$hn_second = $pn_second + $pn_seconds % 60;
}
if ($hn_second >= 60) {
++$hn_minutes;
$hn_second -= 60;
} else {
if ($hn_second < 0) {
--$hn_minutes;
$hn_second += 60;
}
}
if ($hn_minutes == 0) {
$hn_year = $pn_year;
$hn_month = $pn_month;
$hn_day = $pn_day;
$hn_hour = $pn_hour;
$hn_minute = $pn_minute;
} else {
list($hn_year, $hn_month, $hn_day, $hn_hour, $hn_minute) = Date_Calc::addMinutes($hn_minutes, $pn_day, $pn_month, $pn_year, $pn_hour, $pn_minute);
}
return array($hn_year, $hn_month, $hn_day, $hn_hour, $hn_minute, $hn_second);
}
}