Hook

A hook is a mechanism that allows custom code to be inserted at a predefined point in a process, framework, or system. Rather than modifying existing code directly, hooks let external logic react to or alter behaviour at extension points.

Hooks appear in several distinct forms during development:

• Property hooks: they are the get and set accessors, attached directly to a class property, replacing the need for explicit getter and setter methods.

• Webhooks: they are HTTP callbacks where a remote server pushes event notifications to a registered URL. The receiving application exposes an endpoint and reacts to the incoming payload.

• Git hooks: they are shell scripts that Git executes automatically at specific points in the version-control workflow, such as before a commit or after a push. They are widely used to enforce code-quality checks in projects.

In plugin and framework architectures, hooks are often called filters or actions in WordPress, events in Symfony and Laravel, or simply listeners.

Related : Property Hook, Webhook, Git Hook, Event Driven, Observer Pattern, Callbacks, Plugin, Listener