Is this an accurate age calculation algorithm?

[fallus]

$age=date("Y",$now)-date("Y",$birthdate);
if (date("m",$now)<date("m",$birthdate)) {
	$age--;
} elseif ((date("m",$now)==date("m",$birthdate))) {
	if (date("d",$now)<date("d",$birthdate)) {
		$age--;
	}
}

I didn't want to do $now-$birthdate and divide by (606024*365) because of leap years. so what I did was calculate the difference in years, so you have the age that person becomes in the $now year. Then I look at the month -> is it smaller than the month of the birthday, the age is one less. If this is not the case, check if it is the same month. If so, I needed to check the day of the month.

So, is this accurate?

Thanks a lot for your feedback.

[PHPThorsten]

why reinventing the wheel?

have a look at http://www.phpinsider.com/php/code/Date_Calc/

and the funktion date_diff()

[fallus]

I would have spent as much time or more trying to find this function, check whether it was accurate and not buggy, implement it in my code (there are lots of functions in there that I don't need and I don't want that overhead), test it, etc... plus, I'm not lazy and like figuering out things like this myself. and I never trust other people's code :p

Could anyone just confirm that my code is accurate? I believe it is...

[barand]

Looks OK to me