This book covers a wide range of topics starting with the introduction of web applications, including client-side and server-side scripting, different categories of web applications, and the installation process of popular server environments like WAMP, LAMP, XAMPP, and MAMP. The book contains the basics of PHP, including its history, features, and advantages, with setting up a PHP development environment. It covers PHP basics like variables, constants, data types, operators, control structures, and functions, providing a solid foundation for web development. Next, you will learn about forms, user input, cookies, and sessions, creating web pages with GUI components, validating user input both client-side and server-side, and handling cookies and sessions in PHP. It also covers PHP strings, file handling, and database operations, including connecting to a MySQL database and using database handling functions.