: Decide if the app should stop working entirely or enter a "read-only" mode if the server is unreachable. code snippet for verifying a key against a remote server? masterix21/laravel-licensing - GitHub
These repositories include both the (where you generate keys and manage customers) and the Client (the code that goes into your product).
GitHub is a hub for open-source and commercial license management solutions that can be integrated into your projects. Why Use a PHP License Key System?
Verdict