How Can I Prevent Cheating in a PHP Quiz Without Completely Disabling the Browser Back Button?

Preventing Browser Back Button in a PHP Quiz Application with JavaScript

In an online PHP quiz application, it may be necessary to restrict users from navigating back during an exam to prevent cheating. While disabling the back button can be tempting, it poses challenges due to security restrictions.

Attempted Solution and Issues

You have employed a script that leverages window.history.forward() and the noBack() function to prevent back navigation. However, this approach interferes with the functionality of your exam timer, stored in the cdtimer.js file.

Alternative Approach

Disabling the back button completely may not be practical. Instead, consider warning users about potential data loss if they attempt to navigate back:

window.onbeforeunload = function() { return "Your work will be lost."; };

This prompts users before leaving the page, reminding them of any unsaved progress.

Considerations

However, browsers implement back button policies that vary. Some may offer options to circumnavigate such restrictions, limiting the effectiveness of this approach. For a more comprehensive understanding of browser back button behavior, refer to:

http://www.irt.org/script/311.htm

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