[wp-trac] [WordPress Trac] #43019: Hook to validate post form data before save

[WordPress Trac]

#43019: Hook to validate post form data before save
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 Reporter:  henry.wright                         |       Owner:  (none)
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  Awaiting
                                                 |  Review
Component:  General                              |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch ux-feedback needs-testing  |     Focuses:
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Comment (by foresmac):

 This would be super useful. Maybe the way to do it is to have the callback
 return an array of WP_Error for each custom field that fails validation?
 If it's empty, then there are no custom field errors.

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Ticket URL: <https://core.trac.wordpress.org/ticket/43019#comment:7>
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