[wp-trac] [WordPress Trac] #5392: get_user_by_email() and get_user* cleanup

[WordPress Trac]

#5392: get_user_by_email() and get_user* cleanup
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 Reporter:  ryan     |       Owner:  anonymous 
     Type:  defect   |      Status:  new       
 Priority:  normal   |   Milestone:  2.4       
Component:  General  |     Version:  2.4       
 Severity:  normal   |    Keywords:  user cache
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 Add a get_user_by_email() function to get a user by email address.  It
 should use an email to user id cache to avoid DB trips. If an email
 address does not match a user, cache that fact. If this results in too
 much stuff in the cache, we can lose this part.

 While we're at it.  Clean up the get_user* functions.  Refactor the back
 compat and caching code into a new private function shared by all of the
 get functions.

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Ticket URL: <http://trac.wordpress.org/ticket/5392>
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