Given any unix-timestamp T, I want to fetch the timestamp of the midnight before T.
The given timestamp can be any integer: now, today, (not too far[]) in the future or (not too far[]) in the past.
Is there a cleaner way then (pseudocode):
<?php $midnight = strtotime("{date('d',$ts)}-{date('m',$ts)}-{date('Y', $ts)} midnight"); ?> Thanks.
[*] somewhere between 1990 and 2020.
I would do it as
$midnight = strtotime(date('Y-m-d',$ts).' 00:00:00'); ...but whether that is cleaner/better is debatable...
Since a full day is 86400 seconds, you should be able to do this:
$midnight = $ts - $ts%86400; However, this wouldn't consider any leap seconds that might have been applied to the unix timestamp.
This would be a lot more performant than using strtotime but would probably only matter if you would do this in big tight loops.
Et voila'
<?php $midnight = strtotime(date('d-m-Y',$ts)); echo date('d-m-Y H:i:s',$ts); // output 03-11-2011 12:43:41 echo date('d-m-Y H:i:s',$midnight); // ouput 03-11-2011 00:00:00 ?> 