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

$tomorrow = strtotime('+1 day', strtotime(date('Y-m-d')));
$secondsLeftToday = time() - $tomorrow;