php - Divide HH:mm:ss string data with integer value

Question

I have some string value with time format ie 20:30:00 and I want to divide it by 2 (this is an integer value referencing to number of hours), and expected result must be 10:30:00.
What I have heard is that I need to change it string time format to seconds and then divide it but I don't have any sample to compute it.

Answer 1

This is fairly simple using the date function with a time argument. strtotime will convert the time to an integer (unix timestamp).

date('H:i:s', strtotime($time)/2);