On Jul 6, 2005, at 5:31 PM, Edward Vermillion wrote:
On Jul 6, 2005, at 5:17 PM, Edward Vermillion wrote:
On Jul 6, 2005, at 4:44 PM, Philip Hallstrom wrote:
of leap years between the two dates. Leap years occur every 4
years, and 17 / 4 = 4.25, so there were 4 leap years between 7/6/88
and 7/6/05 and
Just to nitpick... :-)
http://en.wikipedia.org/wiki/Leap_year
The Gregorian calendar adds an extra day to February, making it 29
days long, in years where the quotient has no remainder when divided
by 4, excluding years where the quotient has no remainder when
divided by 100, but including years where the quotient has no
remainder when divided by 400. So 1996, 2000, and 2400 are leap
years but 1800, 1899, 1900 and 2100 are not.
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I always wondered what kind of drugs those guys were on when they
came up with the leap-year system... :P
One interesting side note to the op's problem, since I'm not going to
be able to do anything else till I figure this out now..., if one of
the dates is a leap year the 365.25 works fine, which make me wonder
how the strtotime() function is working... or maybe that's what it's
supposed to do... ;)
But then, even if I do figure this out, it's still going to tell me
I'm only 35... which is a bit off...
As usual Richard's way is probably the best for any "real world" age
deduction. ;)
Well, I'll let you test through it but it seems to work with the two or
three dates I ran through...
<?php
$bd="1988-07-07"; // birth date
$td="2005-07-06"; // today
$day1 = strtotime($bd);
$day2 = strtotime($td);
$sy = 31536000; // short year 365 days
$spd = 86400; // seconds per day
$realAge = floor(($day2-$day1-($spd*floor((($day2 -
$day1)/$sy)/4)))/$sy);
print $realAge;
exit;
?>
I left $sy and $spd in so you could see where those values were coming
from
but you could just as well stick the numbers in for the vars and only
have $day1
and $day2 hanging around.
of course it only works on most systems with "birth dates" before the
epoch... :P
Edward Vermillion
[EMAIL PROTECTED]
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