[wp-trac] [WordPress Trac] #33442: Widgets not displayed if no $instance data is set

[WordPress Trac]

#33442: Widgets not displayed if no $instance data is set
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 Reporter:  johnnyb       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  4.3.1
Component:  Widgets       |     Version:  4.3
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by GregRoss):

 @westonruter why limit it to arrays?  The old code was type agnostic,
 false or *any* type of data worked.  If the plugin author wanted to store
 the config in an object or a string, that was fine.

 Simply reverting to array_key_exists() and then updating the inline docs
 to reflect the fact that *any* data type (including no data, aka null) may
 be returned from the update() callback and be passed in to the filter.

 After all null could be a valid configuration set for a widget (aka use
 defaults).

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Ticket URL: <https://core.trac.wordpress.org/ticket/33442#comment:6>
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