/**
* Returns number of days between two given dates
*
* @param int $day1
* the day of the month
* @param int $month1
* the month
* @param int $year1
* the year. Use the complete year instead of the
* abbreviated version. E.g. use 2005, not 05.
* Do not add leading 0's for years prior to 1000.
* @param int $day2
* the day of the month
* @param int $month2
* the month
* @param int $year2
* the year. Use the complete year instead of the
* abbreviated version. E.g. use 2005, not 05.
* Do not add leading 0's for years prior to 1000.
*
* @return int the absolute number of days between the two dates.
* If an error occurs, -1 is returned.
*
* @access public
* @static
*
*/
static function dateDiff($day1, $month1, $year1, $day2, $month2, $year2)
{
if (!Calc::isValidDate($day1, $month1, $year1)) {
return -1;
}
if (!Calc::isValidDate($day2, $month2, $year2)) {
return -1;
}
return abs(Calc::dateToDays($day1, $month1, $year1) - Calc::dateToDays($day2, $month2, $year2));
}
