[wp-trac] [WordPress Trac] #51894: PHP 8: Invalid functions added to hooks now cause fatals

[WordPress Trac]

#51894: PHP 8: Invalid functions added to hooks now cause fatals
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 Reporter:  dlh                            |       Owner:  (none)
     Type:  enhancement                    |      Status:  new
 Priority:  normal                         |   Milestone:  5.6
Component:  Plugins                        |     Version:
 Severity:  normal                         |  Resolution:
 Keywords:  php8 has-patch has-unit-tests  |     Focuses:
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Comment (by hellofromTonya):

 First pass implementation is ready for review and discussion in
 [https://github.com/WordPress/wordpress-develop/pull/777 PR 777].

 - Applies `_doing_it_wrong()` to `WP_Hook::apply_filters` (which also
 applies it to `WP_Hook::do_action`.
 - Adds test coverage for the changes.

 Once we get agreement on it, then the same treatment can be applied to
 `WP_Hook::do_all_hook()` and elevate the error level to `E_USER_WARNING`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51894#comment:8>
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