Reduce unnecessary DB access

[pawandubey]

The same article is being fetched from the DB thrice if I do the following:

1. View an article
2. Like it
3. Unlike it

Instead of making three DB calls here, reduce it to just one, and keep the article in memory while it is being viewed, and update the DB with the like/dislike count once the user leaves the page. This would reduce load on the server.

[pawandubey]

Great work, BTW. It is a pretty good system, considering it is written from scratch. You are sanitizing the input and SQL queries, and are validating the stuff that needs to be validated. Really nice to see 👍

[bhargavkaranam]

Thank you for your inputs. Will work on converting the code to object oriented. Need to make a system so that a particular user cannot like/dislike an article more than once.