public function calculateAgeOnDate($date)
{
$ageInfo = parseAgeInfo($this->dob, $date);
return $ageInfo['age'];
}
/**
* Function to find age in months (with decimal) on the target date
*
* @param string $dob date of birth
* @param string $target date to calculate age on
* @return float months(decimal) from dob to target(date)
*/
function convertDobtoAgeMonthDecimal($dob, $target)
{
$ageInfo = parseAgeInfo($dob, $target);
return $ageInfo['age_in_months'];
}