HTTP/3 with PHP/CURL

http3.php

if (!defined('CURL_HTTP_VERSION_3')) {
    define('CURL_HTTP_VERSION_3', 30);
}

$ch = curl_init("https://cloudflare-quic.com/");
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_3);
curl_exec($ch);