What you ask is simple. You must use MySQL to save what would be the articles in a database. I do not recommend that you save images in a database, since they are very heavy and can significantly lower performance.
So, if you want to save an article there are several aspects to take into account;
Each article is unique, so each article must have a different id
Each article has title and content, so you must create a column called title and content
If you add images, I recommend that you save the images in a separate folder, then what you would gaurdarias in the database, would be your name and extension and you would program the address with PHP.
I would really help you to show you a PHP code, but what you ask is very extensive, I recommend that you see some simple PHP tutorials, tutorials that teach you how to work PHP files, since you can avoid an SQL injection or upload of unwanted files