Complete php Form

I need the attached .php form registration to be completed, what is still required is the following: - Form field validation (No empty fields + email field validation) - Saving to MySQL database In addition this form will be used within a current Wordpress site. Delivery will have to include: 1. [login to view URL] file (original reworked) 2. SQL query that can be run within phpMyAdmin 3. Any notes and additions that have to be made within [login to view URL] and/or [login to view URL] (if applicable) 4. Clear commenting on code All [login to view URL] best practices and security to be used.