Re: PHP 4.0 Bug #9998: mktime() calculation error - 25 hours in a day

You've discovered a problem with daylight savings time, as the dates you found are the end of DST (at least in the US) when we set our clocks back an hour. I suspect you'll find 23 hour days in April. -david <beartales@earthlink.net> wrote in message news:20010326170514.15800.qmail@php2.chek.com... > From: beartales@earthlink.net > Operating system: freebsd 4.2 > PHP version: 4.0.4pl1 > PHP Bug Type: Date/time related > Bug description: mktime() calculation error - 25 hours in a day > > using mktime() one day per year has 25 hours in it > if you substract one date from the previous day and divide > by 3600 you should find there are 24 hours in that day. > however, one day per year has 25 hours. > so far i have found one day per year. > and a different day every year. > > 10/29/2000 25 hours > 10/28/2001 25 hours > 10/27/2002 25 hours > > to reproduce the problem: > > (mktime(0,0,0,10,30,2000)-mktime(0,0,0,10,29,2000))/3600 > > (mktime(0,0,0,10,29,2001)-mktime(0,0,0,10,28,2001))/3600 > > (mktime(0,0,0,10,28,2002)-mktime(0,0,0,10,27,2002))/3600 > > i found the problem because i was creating date ranges for > the user and putting them into a database. if i add the > number of days in a month to a date, i should then have the > same numeric date in the new month. for instance convert > 08/10/2001: > $new_day = mktime(0,0,0,8,10,2001) + ( 31 * 86400 ) > ( 31 number of days in august ) > ( 86400 seconds in a day ) > convert back to date date("Y-m-d", $new_day ) > should and does = 09/10/2001 > > i have now tried this on two different servers. > one - PII 350 freebsd 4.2, apache 1.3.17, php 4.0.4pl1 > two - PIII 667 freebsd 4.2, apache 1.3.17, php 4.0.4pl1 > > both return the same problem > > thanks for any insight > James Lose 03/26/2001 > > > -- > Edit Bug report at: http://bugs.php.net/?id=9998&edit=1 > > > > -- > PHP Development Mailing List <http://www.php.net/> > To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > For additional commands, e-mail: php-dev-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net >