[wp-trac] [WordPress Trac] #40646: Move code from `ms-settings.php` into functions

[WordPress Trac]

#40646: Move code from `ms-settings.php` into functions
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 Reporter:  flixos90            |      Owner:
     Type:  enhancement         |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  Networks and Sites  |    Version:
 Severity:  normal              |   Keywords:  needs-patch needs-unit-tests
  Focuses:  multisite           |
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 As briefly discussed during yesterday's office-hours, it would be a good
 idea to move most of the bootstrap code from `ms-settings.php` into
 separate functions. `ms_load_current_site_and_network()` which was added
 in [37475] was a good first step in that direction. Let's introduce
 further functions (possibly small units) to make `ms-settings.php` less
 complex and more functionality testable.

 Once `ms-settings.php` becomes more lightweight, we may even think about
 removing that file and handling all of it in `wp-settings.php`, as this
 would give a better overview of the entire core bootstrapping process.

 This ticket is a subticket for #40623.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40646>
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