I am creating a online examination portal where the students get a total of 3 hrs to answer the question , i want to save the value of the countdown timer in the database so that if there is a power failure then the timer can again start from the last saved value
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- dscjp19831212 2014-02-18 12:22关注
You should track the date when the timer starts (which can be a mysql datetime column) and now you can calculate the time which is past.
Here an example for calculate the time:
<?php // load the date from the database $timeDate = strottime($data['created_at']); $now = time(); $diff = $now - $timeDate; // $diff is now an \DateInterval if ($diff > 10800) { // If the difference more than 3 hours // show some errors or do whatever you want :) }
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