[wp-trac] [WordPress Trac] #46635: Improve identifying of non–trivial callbacks in hooks

[WordPress Trac]

#46635: Improve identifying of non–trivial callbacks in hooks
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 Reporter:  Rarst        |       Owner:  (none)
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  Awaiting Review
Component:  General      |     Version:
 Severity:  normal       |  Resolution:
 Keywords:               |     Focuses:  coding-standards
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Comment (by azaozz):

 The discussion about closures in hooks here and on
 https://make.wordpress.org/core/2019/03/26/coding-standards-updates-for-
 php-5-6/ has been ...fascinating :)

 As there doesn't seem to be a good way to remove filters and actions where
 the callback is a closure for now, I think we should add a "Doing it
 wrong" warnings so all new plugin/theme developers are aware they are
 breaking the hooks API.

 If/when closures become "easily removable", we can remove the Doing it
 wrong warnings too.

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Ticket URL: <https://core.trac.wordpress.org/ticket/46635#comment:10>
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