There are situations where you might want to know a bit more about your commenter: their age, the city they live in, or the color of their underwear. This article explains how to add an input field, store the data in the database and how to display the additional data in your blog if your theme uses the comment_form() function provided by WordPress.
„Celý článek »“:http://wpengineer.com/2214/adding-input-fields-to-the-comment-form/
