Requirements

Mandatory

PHP 7.4 or 8.0+
A PSR-17 (HTTP Message Factory) implementation
A PSR-18 (HTTP Client) implementation
The JSON extension

Optional

A PSR-3 (Logger Interface) implementation for debugging

Extension Specific

VAPID extension

Required:
- openssl extension
- mbstring extension
- A JWT Provider
Optional:
- A PSR-3 (Logger Interface) implementation for debugging

{% hint style="success" %} This library provides JWT Provider implementations for web-token and lcobucci/jwt {% endhint %}

Payload extension

Required:
- openssl extension
- mbstring extension
Optional:
- A PSR-6 (Caching Interface) implementation
- A PSR-3 (Logger Interface) implementation for debugging