Create a web push notification PHP for Safari and iOS

I JUST NEED A WORKING DEMO
To create a web push notification system that works seamlessly across all major browsers, including Firefox, Chrome, and Safari, as well as on iOS devices. The solution should include a button (checkbox) that, when clicked, requests notification permission from the user. If the permission is granted, notifications can be sent through the PHP backend.
Requirements:
Cross-Browser Compatibility:
Ensure that the web push notifications work on Firefox, Chrome, and Safari.
Ensure compatibility with iOS devices.
User Interface:
Create a button (preferably a checkbox) on the web page.
When the button is clicked, it should prompt the user with a notification permission request.
Backend Integration:
If the notification permission is granted by the user, the system should be capable of sending notifications through the PHP backend.
Steps to Achieve This:
Create the HTML/CSS for the Button:
Design a checkbox that users can click to enable notifications.
JavaScript for Notification Permission:
Use JavaScript to request notification permissions from the user.
Handle the permission responses accordingly.
Service Worker for Push Notifications:
Implement a service worker that will manage the push notifications.
PHP Backend for Sending Notifications:
Implement PHP code to send notifications using appropriate libraries.