Timimg in php

I want to write the script that allow user to playing the simple puzzle game but the amount of time. For example the game start at 10:30 and support to be finished 2 hours later i.e 12:30 after that time the score will not be calculate. Could anyone tell me how to implement such a thing. Thank you
P/s i already wrote the game i just need to do the calculating score system.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
look through there.. figure out how to find time and :

startTime = ....;
endTime = startTime + 120;
do {
/* game code */
nowTime = ....;
} while (nowTime < endTime);
Or use time() and sessions

$_SESSION["startSec"] = time();
/* game code */
if($_SESSION["startSec"] < (60*60*2) {

Instead af sessions, you could set a cookie

And with some Javascript you could show the  time there's left to play
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.