Show age in year

hello, I'm working with divi and I have this code in the template
"echo do_shortcode('[et_pb_section global_module="4084"][/et_pb_section]');"

the problem I have is that it is a group of acf fields and I have a data Picker and it gives me the date of birth when what I am looking for is that it gives me the age

I have seen code like this:

"function get_age_by_date($date_of_birth)
{
$birth = new DateTime($date_birth);
$now = new DateTime(date("Y-m-d"));
$difference = $now->diff($birth);
return $difference->format("%y");
}
// Try
$dates = ['2020-05-05', '1990-01-01', '1999-01-01', '2002-12-31'];
foreach($dates as $date){
printf("Age for %s: %d\n", $date, get_age_according to_date($date));
}"

but i have no idea if i can implement this, thanks in advance