Add drand-client-php (PHP) to Client Libraries list

[dev404ai]

New client library: drand-client-php

• Repository: https://github.com/dev404ai/drand-client-php
• Package: dev404ai/drand-client-php (Composer)
• Language / Runtime: PHP ≥ 8.2
• License: This project is dual-licensed under the MIT and Apache 2.0 licenses
• Maintainer: @dev404ai (dev404ai@gmail.com)

Key features

• Pure-PHP HTTP client (no native extensions)
• Verifies BLS12-381 signatures against chain-hash
• Automatic fail-over & racing across League-of-Entropy endpoints
• PSR-18 HTTP client / PSR-17 factory agnostic
• Optional PSR-6 / PSR-16 caching layer
• 100 % PHPUnit coverage, PHPStan level max

use Drand\Client\Http\DrandHttpClient;

$drand = new DrandHttpClient(
    'https://api.drand.sh',
    // League-of-Entropy default chain hash
    '8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce'
);

$latest = $drand->latest();
printf("Round %d – %s\n", $latest->round, $latest->randomness);

We’d love to have this library listed under Developer → Client Libraries on docs.drand.love.
Happy to open a follow-up PR adding a row to developer/clients.md once approved.

Thanks for your time!

/cc @nikkolasg @alanshaw @anorth