Match array value

[zzz]

I have an array with age groups:

$ages = array(">19" => "Under 19", "20-29" => "20 to 29", ... "85>" => "85 and over");

If I have a data of birth in the following format: 1977-03-29 how do I match it to the appropriate array key?

[stewartship]

my suggestion would be to use the bday info, in a function which then categorises the birth date into the appropriate category by counting the number of years.

You can use explode to sort the bday info into year month and day (seperate and without hyphens) then calculate the number of years, and then assign to the correct category of >19, or 85 and over etc.

[zzz]

I guess my question would be better phrased:

If I know the age as in years: 26, how do I match it to 20-29 group key?

It'll be silly to do for each group:

if (20 > $age > 29) {
$key = '20-29';
}

I just thought there's a better way of doing it.

I can re-write the array, how should it look then?