SAMS – Learn how to access a MySQL database from the Web using PHP, including how to read from and write to the database and how to filter potentially troublesome input data.

Write the PHP code to get the email address from the form, connect to the database and insert the values into the database. Save this file as "postemail.php" in order to link it to the "action" in ...

The old, established PHP code acts as a front door to the database, double-checking the requests, cleaning up the data, and generally providing all of the business logic.

If you're building NGINX sites, you'll probably need PHP-FPM support enabled. Jack Wallen shows you how.