Re: Date math
| From: | Richard Lynch | Date: | Wed, 26 Mar 2008 14:23:14 +0000 |
| Subject: | Re: Date math | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-272129@lists.php.net to get a copy of this message | ||
On Sun, March 23, 2008 11:17 pm, Ron Piggott wrote:
> I have this math equation this list helped me generate a few weeks
> ago.
> The purpose is to calculate how many days have passed between 2 dates.
>
> Right now my output ($difference) is 93.9583333333 days.
>
> I am finding this a little weird. Does anyone see anything wrong with
> the way this is calculated:
>
> $date1 = strtotime($date1); (March 21st 2008)
> $date2 = strtotime($date2); (December 18th 2007)
>
> echo $date1 => 1206072000
> echo $date2 => 1197954000
>
> #86400 is 60 seconds x 60 minutes x 24 hours (in other words 1 days
> worth of seconds)
>
> $factor = 86400;
>
> $difference = (($date1 - $date2) / $factor);
float division introduces rounding errors, by the nature of a floating
point representation in a finite number of bits.
Use http://php.net/round and http://php.net/int
--
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?