Such things like copyright dates, ages, etc. can cause problems on websites unless they are dynamic. For example, I have my age in the little about me blurb in the sidebar. I made a little function to calculate my age so that I don’t have to go in every year on my birthday and add another year to my age.

The Function

function age($bMonth,$bDay,$bYear) {

	$cMonth = date('n');
	$cDay = date('j');
	$cYear = date('Y');

	if(($cMonth >= $bMonth && $cDay >= $bDay) || ($cMonth > $bMonth)) {
		return ($cYear - $bYear);
	} else {
		return ($cYear - $bYear - 1);
	}
}

This function takes 3 arguments: the birth month, the birth day, and the birth year. It will return the calculated age. It obviously won’t work with an age in the future; it will return a negative number. I could add in checking to see if it’s a valid date, but I don’t think it’s really necessary.

Check Out Some Examples

Nothing too complicated. Let me know if anyone has any suggestions to shorten the code.

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Kaimite
3.10.2008 at 5:36 am
#
Reply »

Hello :

Here is 2 suggestions :

function age2($bDate) {
	list($bYear, $bMonth, $bDay) = explode("-", $bDate);
	list($cYear, $cMonth, $cDay) = explode("-", date("Y-m-d"));
	return ( ($cMonth >= $bMonth && $cDay >= $bDay) || ($cMonth > $bMonth) ) ? $cYear - $bYear : $cYear - $bYear - 1;
}

echo age2("1978-01-14");

function age2($bMonth,$bDay,$bYear) {
	list($cYear, $cMonth, $cDay) = explode("-", date("Y-m-d"));
	return ( ($cMonth >= $bMonth && $cDay >= $bDay) || ($cMonth > $bMonth) ) ? $cYear - $bYear : $cYear - $bYear - 1;
}

echo age2(1,14,1978);

See you.

Kaimite

- Sony AK
- 6.19.2008 at 3:22 am
- #
- Reply »
Great post :) i’m using it :)
- Matthew Pennell
- 6.21.2008 at 10:45 am
- #
- Reply »
Sorry for the much delayed comment, but how about this much simpler solution:

echo intval((time() - strtotime(‘14-01-1978’)) / 31557600);

It will tick over at some point during the day of your birthday, as it uses an approximation of a year (365.25 days to represent a partial leap-year).

- 9.12.2008 at 5:19 pm
- #
How to take out user's AGE in PHP? - DesignersTalk

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Hi, I’m Trevor Davis

I’m a 25 year old Front-End Developer living in Alexandria, VA. I work full-time at Matrix Group International and freelance on the side.

I specialize in CSS, HTML, jQuery & WordPress. See more of my work, and then hire me.

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