[wp-trac] [WordPress Trac] #34131: Add support for HTTP/2 to status_header()

[WordPress Trac]

#34131: Add support for HTTP/2 to status_header()
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 Reporter:  johnbillion  |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  4.4
Component:  General      |    Version:
 Severity:  normal       |   Keywords:
  Focuses:               |
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 The `status_header()` function only outputs one of `HTTP/1.0 {status}` or
 `HTTP/1.1 {status}` based on the requested protocol in
 `$_SERVER['SERVER_PROTOCOL']`.

 This function should also support `HTTP/2` and `HTTP/2.0` (Nginx trunk is
 currently using `HTTP/2.0` which [https://trac.nginx.org/nginx/ticket/800
 I'm not sure is correct]).

 In addition, `$_SERVER['SERVER_PROTOCOL']` is used in three other places
 in core, so these should be updated too.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34131>
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