Form handling script

The task is to build a form with short text fields (all mandatory):

1. first name

2. last name

3. email - field with validation for email

4. create a name for your Partner promo code - short text field

User side script operation:

 Unable to accept data if email address exists in the database

 Unable to accept data if promo code name already exists

 When properly filled out, sends an email to the email address entered with confirmation of the creation of your partner promo code and all data from the form.

 After correct completion, sends an email to the entered email address of the administrator with notification of the completion of the form and all data from the form.

Operation of the script to the admin page:

 Ability to view entries, as well as edit and delete them (individual and group).

 Ability to register additional administrators with limited rights.

 Option to nest the form on any page.

 Option to secure the form, e.g. reCAPTCHA.