Navigating through the commits and files will help you build:

• on the client
  • a user friendly opt-in push notification button
• on the server
  • an endpoint for managing your push notification subscriptions
  • an endpoint that triggers push notification thanks to web-push-php

• Chrome or Firefox
• PHP 7.1+
  • gmp
  • mbstring
  • curl
  • openssl

PHP 5.6+ is no longer maintained, but you can checkout the v1.x branch.

$ composer create-project minishlink/web-push-php-example
$ cd web-push-php-example

$ php -S localhost:8000 router.php

And open localhost:8000.