I have a form in php/html that I'm using to gather data. I've got it password protected, and right now I've got it set to email the data to my email, but I'd like to set it up in a database and check for all fields filled out(javascript) and make sure that the email entered is only used once. Is there a pre-made php application for something like this? I've already done the form, just need to do the database and I've never done one.
