How to understand shared data and View Composer between Laravel views

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1. Share data between views

In addition to passing the specified data in a single view, it is sometimes necessary to pass in the same data in all views, that is, we need to share the data in different views. To do this, you need to use the view factory's share method.

The global help function view is similar to response, returning an instance of Illuminate\ View\ View if a parameter is passed, and an instance of Illuminate\ View\ Factory if no parameter is passed in. So we can share data between views by using the following in the boot method of the service provider: