Have you started writing the code and have specific problems with it, or are you looking for a “start from scratch” primer on taking data from a HTML form and using it to retrieve data from a database? Do you already have the database with data in it, or do you also need to write code to enter that? How much experience in HTML and PHP do you have?
Usually the community of the software you are working with should be there for you for such support. But, as I said earlier, if you come at them like you came here at this community, you likely won’t get any help, simply because you aren’t showing any effort to try to solve a problem yourself. That is key to getting support from an open source community. Try first to fix/ resolve your problem/ task. If you get stuck, then ask questions.
And another tip. An online community like this one, (or any other for that matter) doesn’t really have the proper resources to teach the noobs the basics. They may have other services, like here on Sitepoint, where they offer basic training and even some intermediate and advanced training. However, even with that, you have to learn those things on your own.