Bug #10694 Updated: mktime leap year bug

ID: 10694 Updated by: derick Reported By: schnitten@gmx.at Status: Closed Bug Type: Date/time related Operating System: Redhat 6.2 PHP Version: 4.0.4 Assigned To: derick New Comment: Ok, I was just trying to explain the same thing after some investigating... Derick Previous Comments: ------------------------------------------------------------------------ [2001-08-31 14:05:10] schnitten@gmx.at The problem is how you look at it: mktime first calculates year + month... the last step is to add the seconds. I wanted this the other way round. Would be a nice feature to select the priority of the different input values. When you use unix timestamps for calculations its very difficult to add 1 year (or something similar) to that date... ------------------------------------------------------------------------ [2001-08-31 12:06:36] sander@php.net Status after almost three months??? ------------------------------------------------------------------------ [2001-05-07 04:23:18] derick@php.net Assigning to myself ------------------------------------------------------------------------ [2001-05-07 01:50:21] schnitten@gmx.at first of all: I use php 4.0.1pl2 and don't have the possibility to upgrade. Please verify with latest version. I tried to add 12 months to a given timestamp and figured out that mktime() doesn't include a 29th February into its calculations. Effect is, that following code doesn't jump forward 1 year during each loop. Every leap year 1 day gets lost! $a = mktime(0,0,0,1,1,1970); for ($i=0; $i<20; $i++) { $a = mktime(0,0,3600 +$a,1+12,1,1970); $b = date("d-m-Y", $a); print "Date: $b<br>"; } ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=10694&edit=1