[wp-trac] [WordPress Trac] #33900: introduce get_current_network_id helper function

[WordPress Trac]

#33900: introduce get_current_network_id helper function
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 Reporter:  spacedmonkey        |       Owner:
     Type:  enhancement         |      Status:  new
 Priority:  normal              |   Milestone:  4.6
Component:  Networks and Sites  |     Version:  4.4
 Severity:  normal              |  Resolution:
 Keywords:  has-patch           |     Focuses:  multisite
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Comment (by johnjamesjacoby):

 My thoughts:

 * Yes
 * Yes
 * Yes

 The second condition could maybe happen if `sunrise.php` was already in
 place and wasn't using core functions to populate `$current_site`, and
 honestly this seems likely for anyone that's using `sunrise.php` since the
 only thing it is really great at is pre-populating those globals.
 ----
 Tangentially, the assumed `1` main network ID return value bothers me. A
 new default constant makes sense here, itself defaulted to `1` in
 WordPress core. And it can still be overridden in `sunrise.php` or `wp-
 config.php`. It's edge-case, but I've already needed to kludge this
 because a new network with a few sites took the place of the original one.

 So for each of the 3 cases, I'd like for the `1` default return value to
 be configurable in some way.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33900#comment:8>
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