[wp-trac] [WordPress Trac] #27003: Introduce wp_get_network() and begin cleanup of multisite load

[WordPress Trac]

#27003: Introduce wp_get_network() and begin cleanup of multisite load
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 Reporter:  jeremyfelt      |       Owner:
     Type:  task (blessed)  |      Status:  new
 Priority:  normal          |   Milestone:  3.9
Component:  Bootstrap/Load  |     Version:  trunk
 Severity:  normal          |  Resolution:
 Keywords:  needs-testing   |     Focuses:  multisite
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Comment (by jeremyfelt):

 Some thoughts.

 * Should a requested path be considered case sensitive for finding
 site/network? #26403 has a `strtolower()` patch.
 * Some sort of `site_not_found` hook (see #21143) can be useful as a
 redirect opportunity.
 * Some sort of hook in `ms_not_installed()` may also be useful. This is
 less of a redirect opportunity and more of an "oh, crap. now what."
 opportunity.
 * `ms_not_installed()` docs are misleading. We mostly call on it when a
 network cannot be found, but the errors seem centered around missing
 sites. The errors are also (purposely?) vague. We could probably be a bit
 more explicit about what has happened when `is_admin()`. This is probably
 worth a new ticket for 4.0.
 * I think the current cookie domain stuff works for current
 configurations. Everything can already be (and is being) overridden in
 sunrise. It is worth looking at in 4.0 to try and support more arbitrary
 domains and paths.

 [https://core.trac.wordpress.org/attachment/ticket/27003/27003.22.diff
 27003.22.diff] moves the site/network not found block up a bit and joins
 it with the empty `$current_site` check. This can all happen before the
 cookie domain is set and before we try to find a network's main site.

 The main goal for this patch is to add documentation to some of the
 redirect behavior and to identify where we can hook in for customization.

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Ticket URL: <https://core.trac.wordpress.org/ticket/27003#comment:47>
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