Date Code

[NZ_Kiwi]

Hi,

This should be easy but i've never used a date in my code!
I want to convert my date of birth to my age...

so.. if a user has a dob of 15 May 1990 the age would show on my screen as 14 ect

any ideas

[LordShryku]

$dob = '1990-05-15';
$age = floor((time() - strtotime($dob)) / 31536000);

time() generates current timestamp, strtotime() to make the dob a timestamp, 31536000 seconds in a year. floor() to get a solid number.

[TheDefender]

Just out of curiosity LordShryku, can you add some code in there to account for leap years?

[LordShryku]

Hrmm....guess I could. Just woke up and got to work. Let me get all settled and I'll see what I can think of.

So now that I've got some coffee in my system, I don't think the current method would be the best way to take leap years into account. Since the epoch only goes back to 1969, we'd only be taking a few leap years into account. Plus, the length of time shortens on a Windows PC. So this probably wouldn't be the best method. But there are calendar and mcal functions that would help here.

But you asked for this to take leap years into account, so here goes:

$dob  = '1990-05-15';
$time = strtotime($dob);
$year = date('Y', $time);
$age  = 0;
if((($year % 4 == 0) && ($year % 100 != 0)) || ($year % 400 == 0)) {
   $age += ((time() - $time) / 31449600);
}
else {
   $age += ((time() - $time) / 31536000);
}

$age = floor($age);
echo $age;