/**
* Converts the date to the specified no of months from the given date
*
* To subtract months use a negative value for the '$pn_months'
* parameter
*
* @param int $pn_months months to add
*
* @return void
* @access public
* @since Method available since Release 1.5.0
*/
function addMonths($pn_months)
{
list($hs_year, $hs_month, $hs_day) = explode(" ", Date_Calc::addMonths($pn_months, $this->day, $this->month, $this->year, "%Y %m %d"));
$this->setLocalTime($hs_day, $hs_month, $hs_year, $this->hour, $this->minute, $this->second, $this->partsecond);
}
/**
* Returns date of the first day of the month in the number of months
* from the given date
*
* @param int $months the number of months from the date provided.
* Positive numbers go into the future.
* Negative numbers go into the past.
* 0 is the month presented in $month.
* @param string $month the month, default is current local month
* @param string $year the year in four digit format, default is the
* current local year
* @param string $format the string indicating how to format the output
*
* @return string the date in the desired format
* @access public
* @static
* @since Method available since Release 1.4.4
*/
function beginOfMonthBySpan($months = 0, $month = 0, $year = null, $format = DATE_CALC_FORMAT)
{
if (is_null($year)) {
$year = Date_Calc::dateNow('%Y');
}
if (empty($month)) {
$month = Date_Calc::dateNow('%m');
}
return Date_Calc::addMonths($months, Date_Calc::getFirstDayOfMonth($month, $year), $month, $year, $format);
}
/**
* Returns an array of dates for a monthly schedule (like subscription)
* @param $startDate date('Y-m-d')
* @param int number of months
* @param bool (optional, default true) include start date in the schedule
*/
public static function monthlySchedule($startDate, $num, $inclstart = true)
{
$startTime = strtotime($startDate);
$startDay = date('d', $startTime);
$startMonth = date('m', $startTime);
$startYear = date('Y', $startTime);
$startoffset = $inclstart ? 0 : 1;
for ($i = $startoffset; $i < $num; $i++) {
$dt[] = Date_Calc::addMonths($i, $startDay, $startMonth, $startYear, '%Y-%m-%d');
// Correcting not valid dates (e.g. february 30, june 31)
/* $tempdt = date('d',strtotime($dt[$i]));
$numd = date('t',strtotime($dt[$i]));
if($tempdt>$numd) {
$dt[$i] = date('Y',strtotime($dt[$i])).'-'.date('m',strtotime($dt[$i])).'-'.$numd;
}*/
}
return $dt;
}