How do I find the unix timestamp for the start of the next day in php?

Question

I have a unix timestamp for the current time. I want to get the unix timestamp for the start of the next day.

$current_timestamp = time();
$allowable_start_d         


        

Answer 1

The most straightforward way to simply "make" that time:

$tomorrowMidnight = mktime(0, 0, 0, date('n'), date('j') + 1);

Quote:

I would like to figure out how many seconds are left in this current day, and only add that many seconds in order to get the unix timestamp for the very first minute of the next day.

Don't do it like that. Avoid relative calculations whenever possible, especially if it's so trivial to "absolutely" get the timestamp without seconds arithmetics.