[wp-trac] [WordPress Trac] #30294: Introduce get_primary_network_id() function

[WordPress Trac]

#30294: Introduce get_primary_network_id() function
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 Reporter:  johnjamesjacoby     |      Owner:
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  Networks and Sites  |    Version:  3.7
 Severity:  normal              |   Keywords:
  Focuses:  multisite           |
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 r25147 introduced the function `is_main_network()` for determining if a
 network ID was the main/primary one. Coupled to this function is the logic
 for determining what the primary network ID actually is.

 It would be helpful for that logic to be extracted into a separate
 function for determining the primary network ID.

 See #25030, r25147.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30294>
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