Getting the total number of seconds

[Alecardo]

Hello,
I have been working on a new update rule for the program. Unfortunately, my return statement only gives me the time I need in the form of 1 day 2 hours 3 minutes. I would like this in total seconds. Is there any code readily available in the program or by php to convert that string into seconds.
Thank you

[Alecardo]

Nevermind, I used the strtotime() function to get timestamp and subtracted from it the current time stamp which I got using time()