[wp-trac] [WordPress Trac] #51511: Introduce Robots API and Media Search Engine Visibility setting

[WordPress Trac]

#51511: Introduce Robots API and Media Search Engine Visibility setting
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 Reporter:  flixos90                             |       Owner:  flixos90
     Type:  feature request                      |      Status:  assigned
 Priority:  normal                               |   Milestone:  5.7
Component:  General                              |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch has-unit-tests needs-dev-  |     Focuses:
  note commit                                    |
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Comment (by flixos90):

 In [changeset:"49992" 49992]:
 {{{
 #!CommitTicketReference repository="" revision="49992"
 Robots: Introduce Robots API.

 This changeset introduces a filter-based Robots API, providing central
 control over the `robots` meta tag.

 * Introduces `wp_robots()` function which should be called anywhere a
 `robots` meta tag should be included.
 * Introduces `wp_robots` filter which allows adding or modifying
 directives for the `robots` meta tag. The `wp_robots()` function is
 entirely filter-based, i.e. if no filter is added to `wp_robots`, no
 directives will be present, and therefore the entire `robots` meta tag
 will be omitted.
 * Introduces the following `wp_robots` filter functions which replace
 similar existing functions that were manually rendering a `robots` meta
 tag:
     * `wp_robots_noindex()` replaces `noindex()`, which has been
 deprecated.
     * `wp_robots_no_robots()` replaces `wp_no_robots()`, which has been
 deprecated.
     * `wp_robots_sensitive_page()` replaces `wp_sensitive_page_meta()`,
 which has been deprecated. Its rendering of the `referrer` meta tag has
 been moved to another new function `wp_strict_cross_origin_referrer()`.

 Migration to the new functions is straightforward. For example, a call to
 `add_action( 'wp_head', 'wp_no_robots' )` should be replaced with
 `add_filter( 'wp_robots', 'wp_robots_no_robots' )`.

 Plugins and themes that render their own `robots` meta tags are encouraged
 to switch to rely on the `wp_robots` filter in order to use the central
 management layer now provided by WordPress core.

 Props adamsilverstein, flixos90, timothyblynjacobs, westonruter.
 See #51511.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/51511#comment:13>
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