Get timestamp from date('z') and year

Question

I know the year and the day of year (0-365). Is there any way to get back from it to timestamp?

Something like:

$day=date('z');
$year=2012;

$timestamp=strtotime($day.'-nd day of '.$year);

Answer 1

Try the following:

$timestamp = mktime(0,0,0,1,$day,$year);

It will produce a timestamp where the time is set to 0:00:00. (I am not sure if it will behave correctly with respect to daylight savings though...)

Check the PHP manual for further details: PHP: mktime - Manual

Answer 2

Maybe strtotime gets handy here: php -r 'echo @date("Y-m-d H:s", strtotime("january 2012 +200 day")).PHP_EOL;' In your example $timestamp = strtotime("january $year +$day day");