Question

Calculating future date from seconds.

$var = 5183990; //seconds
$today = '2013-02-16 11:00:00'; //date

like I have 5183990 seconds as a variable $var.
Now I want to know future date/time after 5183990 seconds from current time.

Answer 1

Since time() returns the current timestamp in seconds, just add your interval in seconds to it, then format it as a date:

echo date("Y-m-d H:i:s",time()+$var);