What does hook mean in php

The hook in php refers to the Hook mechanism. It is a technology popular in windows programming. Its main idea is to preset a hook in advance where code may be added. When we need to re-modify the code When , just mount the extended class or method to this point.

Hook is the Hook mechanism, which is a technology popular in windows programming. The main idea is to bury (default) a hook in advance where functionality may be added. This hook has no practical significance. When we need to re-modify or add logic in this place, mount the extended class or method. Just get to this point.

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Basic idea of ​​hook plug-in mechanism:

In the project code, what do you think Place a hook function where you want to expand (not yet expand). When expansion is needed, mount the classes and functions that need to be implemented to this hook, and then the expansion can be achieved.

The entire plug-in mechanism consists of three parts:

1. Hook plug-in manager class: This is the core file and is an application global Global object. It has three main responsibilities:

• Listen to all registered plug-ins and instantiate these plug-in objects.

• Register all plugins.

• When the hook condition is met, the corresponding object method is triggered.

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2. Function implementation of plug-ins: This is mostly done by third-party developers, but it requires Follow our (manager class definition) rules, which are stipulated by the plug-in mechanism and vary depending on the plug-in mechanism.

3. Plug-in triggering: that is, the triggering condition of the hook. This is a small piece of code placed where you need to call the plugin to trigger this hook.

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