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I am using Laravel and Livewire for this purpose. I have created already a subject with livewire and laravel. The livewire part is very simple and it takes care of js and ajax without any js code.

Do you actually know JavaScript?.. @debjit

I mean, can you at least read it?.. Using AJAX (Asynchronous JavaScript and XML) techniques without some background in JavaScript will limit its potential usefulness.. You need to be thinking as a full-stack developer (aware of the front-end code and the back-end code and how they interact optimally for the benefit of the App) not as a back-end coder (doing all the logic server-side and dumping the result as is) for it to be of any help.

I will be sharing my journey creating this application on Twitter Facebook and LinkedIn. So follow me there and I am thinking it will be completed within a month.

Would be nice if you share that journey with this community too.. May be we can be of some help.

To be frank I never used cookies. I have always relied on server season, it's more secure and does not take any extra effort. ...

Why PHP sessions are more secure?.. Besides, I hope you're aware that PHP sessions use a particular form of cookies too.. Do you know the difference between Cookies and Session cookies?

Yup, you are right. I have used cookies to store the user preferences and save some temp data. laravel remember me and login details also uses a cookie. laravel makes the cookie more secure.

So, you did actually use cookies :-) Now, can you tell us how Laravel PHP framework makes cookies more secure?..

I am adding more data to secure cookies so it eliminates some of the server request, and loads.

Bad idea!!.. Can you think of the why it's a bad idea to store too much date in cookies?.. and can you think of a better alternative for storing data than in cookies ?

Finally, where is the code of the free Open Source Version?!..

Please share have you used any examination system?

No!.. never used one but I did code one basic quiz WebApp in PHP a long time ago (+10 years ago.)

Do you think this feature set is enough for a standard examination web app?
If not what you wanted to see improved?
What should I add to its paid version?

It's hard to say if you don't layout the whole business logic of the App from start to finish.