Countdown timer-php+mysql+js

Question

I am working on online examination. In which the examination duration will fetch by mysql(in minutes). I want to show the countdown time on the top of the page.

current

Answer 1

You can store the current value in a cookie using the form submit or page beforeunload events. Then when a new page loads, get the remaining time and keep counting down. This also allows for some network latency.

Note that the user may be able to access and modify the value of the cookie.