In this tutorial, you began the process of building a web-based application using PHP. You looked at the basic syntax of a PHP script, using it to build a page that accepts input from an HTML form. In processing the form, you reviewed basic structures, such as variables, if-then statements, and loops. You also examined numeric and associative arrays, and how to access their data. You then moved on to looking at and moving data into and out of a MySQL database by creating a SQL statement and executing it, then working with the arrays that represent each row of data. Finally, you looked at using include files.
The purpose of this series of tutorials is to teach you how to use PHP through building a workflow application. Here in Part 1, you began the process by enabling users to sign up for a new account, which you then stored in a database. Subsequent parts of this series explore HTTP password protection and other important issues that will help you on your path to becoming a PHP developer.