Determine Age?

[rayge]

I have 2 Lines of code here one that gets their birthday from a form and then one for todays DATE.

<? $dob = $month."-".$day."-".$year; ?>
<? $today = date("m-d-Y"); ?>

What i HAVE to do is make sure that the User signing up is 13years of age or older..

How can i accuratly Determine that information?

Thanks for any assistance!

[mithril]

Easiest way is to use timestamps to calculate the difference in seconds between 2 dates, then divide by the number of seconds in a year. Check out the Date Time Functions section of the manual for all functions relating is date calculations.

&nbsp;<?php

&nbsp;&nbsp;&nbsp;// number of seconds in 365 days
&nbsp;&nbsp;&nbsp;$yearSec = 31536000;

&nbsp;&nbsp;&nbsp;$dob = mktime(0,0,0,$month,$day,$year);
&nbsp;&nbsp;&nbsp;$current = mktime(0,0,0,date("m"),date("d"),date("Y"));

&nbsp;&nbsp;&nbsp;if (round((($current - $dob)/$yearSec),0) >= 13)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo "13 or older\n";
&nbsp;&nbsp;&nbsp;else
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo "12 or younger";

&nbsp;?>

-geoff

[mithril]

Opps.... change

if (round((($current - $dob)/$yearSec),0) >= 13)

to

if (number_format((($current - $dob)/$yearSec),0) >= 13)

The first will round 12.5 - 12.9 up to 13..... and that's a Bad Thing(tm).

-geoff