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This article mainly introduces "what is the role of hooks in TP framework". In daily operation, I believe that many people have doubts about the role of hooks in TP framework. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the questions of "what is the role of hooks in TP framework?" Next, please follow the editor to study!

The hook is like a mount point, attached to the function. When the mount point is encountered during function execution, the hook pulls a piece of code out and executes the code. A hook function is more secure and convenient than calling another function directly in a function.

When we need to modify the extended function, we do not need to modify the hook in function B, we only need to modify the code block in the hook, and if we modify function A directly, we will modify the class of function B frequently. It violates the principle of closure. On the other hand, the use of hooks is more convenient for later maintenance and functional expansion.

In thinkphp, hooks are behavioral extensions. Here are some online explanations for behavior expansion:

Behavior

Behavior is a relatively abstract concept, which you can imagine as an action or processing in the execution process of the application. In the execution process of the framework, behavior can be generated at every location, such as route detection is a behavior, static cache is a behavior, user rights detection is also a behavior, as large as business logic, as small as browser detection, multilingual detection, etc., can be regarded as a behavior. Even say that you want to pop up Hello,world for users of your site for the first time!

These can be seen as a behavior, the existence of behavior so that you do not need to change the framework and applications, but in the periphery through expansion or configuration to change or add some functions.

There is also location commonality between different behaviors. For example, some behaviors act before the application is executed, and some behaviors are after the template output. We call the location where these behaviors take effect as the tag. When the application runs to this tag, it will be intercepted to implement the relevant behavior.

At this point, the study on "what is the role of hooks in the TP framework" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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