Please use HTTP 1.0 in the request
Please use HTTP 1.1 in the request
Use version 2 for HTTPS, version 1.1 for HTTP (Added in CURL 7.47.0)
Please use HTTP 2 in the request (Added in CURL 7.33.0)
Please use HTTP 2 without HTTP/1.1 Upgrade (Added in CURL 7.49.0)
Makes use of explicit HTTP/3 without fallback. (Added in CURL 7.66.0)
These enums are for use with the CURLOPT_HTTP_VERSION option.