Requirements

Mandatory

• PHP 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

Payload extension

• Required:

  • openssl extension

  • mbstring extension

• Optional:

  • A PSR-6 (Caching Interface) implementation

  • A PSR-3 (Logger Interface) implementation for debugging