6. Using HTTP


By the end of this chapter, you will be able to explain the Request-Response Cycle of an application; explain the various HTTP methods; perform data sanitization and validation; track user session data; and build a web application.

This chapter presents you with the necessary tools to use and implement HTTP requests in practical web applications. You will become familiar with request types and URL components and will learn about common vulnerabilities on the World Wide Web (WWW) as well as learn how to protect your applications against such attacks.


So far, we have analyzed and learned about the PHP language itself – including data types, expressions, operators, and control statements – and how to use ...

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