Hi mate
You mean the column type? I'd use one of the TEXT types, and choose the proper size depending on how large you expect the articles to get. Don't forget to properly filter the input, or someone can insert CSRF or XSS into your data, and cause you and your users alot of trouble!! If you really want to allow simple formatting like <p>, then create a whitelist of the most basic formatting tags you want to allow, filter based on that. Disallow everything else.
Good Luck
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