if the age of the child is 1 year old because the child birthdate is year 2020 then the child need to be vaccinated at the age of 2 years old then how can I get the date of the child vaccination that is supposed to be in year 2021?
$fname = $_POST['fname'];
$addre = $_POST['addre'];
$purok = $_POST['purok'];
$num = $_POST['num'];
$bdate = date('Y-m-d', strtotime($_POST['bdate']));
$mname = $_POST['mname'];
$ubrananay = $_POST['ubrananay'];
$tname = $_POST['tname'];
$ubratatay = $_POST['ubratatay'];
$bweight = $_POST['bweight'];
$tbirth = $_POST['tbirth'];
$pbirth = $_POST['pbirth'];
$ba = $_POST['ba'];
//$bcg = $_POST['bcg'];
$bcg = date($bdate'Y-m-d', strtotime('+1 year'));