Website Backend For Adding Articles

I need a script to be upload articles to my website. I currently enter the article details separately into the MySQL database. I am sure most of you have done an admin system before and most include adding articles. The backend should be able to: -login to the admin with user and password -Write a article with all the html buttons to easily format it (add pics, links, text formatting..etc). Insert this article to database. (not sure if there is a preview option, but this would be needed too) -Upload one picture and also convert this to a thumbnail as well. Will need to check size and file type for this. -Pick an article category from category table and insert into database. -Store the date of the article -List the current articles Please show me a preview a similar backend you have done.