function compare_gap($first_date, $second_date)
{
// finds gap between 2 years. No need for months or days, since we look for gaps of several years
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];
}
$year1 = $process_date->search_year($first_date);
$year2 = $process_date->search_year($second_date);
if ($year1 and $year2) {
return $year2 - $year1;
} else {
return false;
}
}
