Going over you codestep by step as PHP processes it.
对你会被当作PHP代码的过程中一步一步来。
2
Because this is a large set of features, you'll write the codestep by step to show how the code evolves to add functionality.
由于这里有很多特性，您将一步步地编写代码来展示这些代码如何不断增加功能。
3
As with the previous article, you can follow along by adding codestep-by-step to your sample project, or you can download the completed project from the download section.