[wp-trac] [WordPress Trac] #40180: Introduce `get_site_by()` function for multisite

[WordPress Trac]

#40180: Introduce `get_site_by()` function for multisite
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 Reporter:  flixos90                             |       Owner:  flixos90
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  4.9
Component:  Networks and Sites                   |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch dev-feedback has-unit-     |     Focuses:  multisite
  tests ms-roadmap needs-dev-note                |
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Comment (by flixos90):

 In addition to improving `get_blog_details()` (see #40228),
 `get_site_by()` can also be leveraged in the following functions:

 * `get_id_from_blogname()`
 * `get_blog_id_from_url()` (this will also get rid of the `blog-id-cache`
 cache group)
 * `domain_exists()`

 These can be dealt with in separate tickets post-merge.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40180#comment:24>
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