wp_get_http has been deprecated. Use WP_Http instead

WP_Http is a:

Core class used for managing HTTP transports and making HTTP requests.

so it should most likely be this link:

https://developer.wordpress.org/reference/classes/wp_http/

instead of:

https://developer.wordpress.org/reference/functions/WP_Http

that redirects you to:

https://developer.wordpress.org/reference/functions/wp_http_supports/

Then there are wrappers like wp_remote_get(), wp_remote_post(), wp_safe_remote_get(), wp_safe_remote_post(), wp_remote_retrieve_response_code(), download_url(), … etc, that makes it easier to use.

Check out e.g. the HTTP API Codex page

Not sure what the use case is here, but there are also media_handle_sideload(), wp_handle_sideload(), … that might be useful.

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