This book explains in detail some of the main features of CI. This book does not contain all the content and details of CI. CI has an excellent online User's Guide that explains most things in detail. it can be used with Download together with CI.

This book is not intended to repeat the content in the User Guide. Instead, this book attempts to make it easy for you to understand how a CI framework works, so you can decide whether it is of value to you before reading this book.

In trying to explain CI How this works is beyond the scope of the User's Guide. (The User Guide is more practical-focused.) This means there are some very theoretical chapters in the "Real Training" section. I found this helpful in understanding How CI works internally; otherwise, it would be difficult to resolve when you encounter a confusing error message.

I try to use a "real world" example when showing CI snippets. What I want to show is that CI Can be used to develop a formal website. Currently, I have several running client websites on hand. I hope to detect, control and test them according to the method I specified, and at the same time record the program operation behavior. I can get a relevant report when I need it.

The examples in this book cannot fully demonstrate the functions of CI, but I think these examples should still demonstrate CI to a certain extent. The ability to simplify handling of commonly used applications (and some uncommon ones).

This book systematically explains the main features of CodeIgniter, and provides detailed explanations with corresponding code examples, so that you can master CodeIgniter from the simple to the deep.