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I want to know how to apply a timer banks in ONLINE EXAM USING PHP? |
I want to know how to apply a timer banks in ONLINE EXAM USING PHP? If you mean, you want to require an exam to be completed within a given time frame, or a section of the exam to be completed within a given time frame, the easiest thing to do is record the Unix timestamp when the user began, then test the page on every post, seeing if the time for the exam has expired. Example: Test has 20 questions on one page. The user can have up to 30 minutes to complete the questions. 1: User logs in. Database saves user info, records test number. You imprint the test number as a hidden field in the test form. 2. User sees page explaining test. User clicks button when he is ready to begin. 3. On button click, current Unix timestamp is entered into table, associated with same test ID. Test ID is stamped onto test page. 4. User takes test. On test submission, you query for the test ID and see if the user has completed the test in time, by adding 30 minutes (1800 seconds) to the timestamp of when the test began. If it's completed in time, you store the results. If not, you invalidate the test. You could also amend this to use AJAX to give a running countdown of time remaining; to allow the person to save his test as he goes along, and keep the test running; to post back automatically every time an answer is provided; etc. If you are creating an online exam using PHP, then I assume you have a mechanism for saving the results, such as using a database management system (MySQL) or saving results into a text file. Whenever you save the results, have the timestamp be saved as well. So if you are using MySQL, have a field with a timestamp type. If you want to force the exam to close when time runs out, then you need to use JavaScript. |
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