checking user input and changing the content of the web page dynamically.
change the appearance of text and animate sections of the page. You can also make asynchronous calls to the server to update and retrieve data.
PHP is a programming language that creates HTML and returns it to the web browser as a web page.
It is especially useful for interfacing with a MySQL database on the server.
The combination of PHP and MySQL opens the possibility to create, save, display, and change data.