[wp-trac] [WordPress Trac] #57996: Change $search_columns type from array to string[].

[WordPress Trac]

#57996: Change $search_columns type from array to string[].
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 Reporter:  tmatsuur         |       Owner:  (none)
     Type:  feature request  |      Status:  new
 Priority:  normal           |   Milestone:  6.2.1
Component:  Query            |     Version:  trunk
 Severity:  normal           |  Resolution:
 Keywords:                   |     Focuses:  docs
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Changes (by SergeyBiryukov):

 * milestone:  Awaiting Review => 6.2.1


Comment:

 Thanks for the ticket!

 The `search_columns` parameter is already documented as `string[]` in
 `WP_User_Query` as of [49693], and in `WP_Site_Query` as of [51184], so it
 definitely makes sense for `WP_Query` too. Introduced in [55248].

 To match the above two classes, I think `string[]` would be preferable
 here, rather than `string|string[]`. While a string can technically be
 passed too, we should encourage passing an array for consistency.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57996#comment:1>
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