function compare_month_gap($first_date, $second_date, $monthgap)
{
// checks gap in months between two dates (to check for birth less than X months after wedding)
include_once CMS_ROOTPATH . 'include/calculate_age_cls.php';
$process_date = new calculate_year_cls();
// take care of combined julian/gregorian dates (1678/9)
if (strpos($first_date, '/') > 0) {
$temp = explode('/', $first_date);
$first_date = $temp[0];
}
if (strpos($second_date, '/') > 0) {
$temp = explode('/', $second_date);
$second_date = $temp[0];
}
$first_date = strtoupper($first_date);
// $process_date->search_month uses upppercase months: DEC, FEB
$second_date = strtoupper($second_date);
$year1 = $process_date->search_year($first_date);
$month1 = $process_date->search_month($first_date);
$day1 = $process_date->search_day($first_date);
$year2 = $process_date->search_year($second_date);
$month2 = $process_date->search_month($second_date);
$day2 = $process_date->search_day($second_date);
if ($year1 and $year2 and $month1 and $month2) {
if ($year1 == $year2) {
// dates in same year - we can deduct month1 from month2
if ($month2 - $month1 < $monthgap) {
return $month2 - $month1;
} else {
return false;
}
} elseif ($year1 + 1 == $year2) {
// consecutive years
if (12 - $month1 + $month2 < $monthgap) {
return 12 - $month1 + $month2;
} else {
return false;
}
} else {
return false;
}
} else {
return false;
}
// insufficient data
}
