[wp-trac] [WordPress Trac] #51525: Add new functions apply_filters_single_type() and apply_filters_ref_array_single_type()

[WordPress Trac]

#51525: Add new functions apply_filters_single_type() and
apply_filters_ref_array_single_type()
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 Reporter:  jrf                                  |       Owner:  (none)
     Type:  feature request                      |      Status:  new
 Priority:  normal                               |   Milestone:  Future
                                                 |  Release
Component:  General                              |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  2nd-opinion php8.x early has-patch   |     Focuses:
  has-unit-tests                                 |
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Comment (by mathieulamiotwpmedia):

 It came up in the discussion as apparently, a majority of filters in the
 core could not use a single type. I don't know the Core well enough to
 have an opinion on that though.

 I can see how nullable types could be used, abusing a bit boolean with
 null cases for instance.
 About union types, we would probably not use it as plugin or theme
 developers, because as you mention, it's a bit missing the goal of
 simplifying safe checks (and that's probably why we did not even think
 about it in the first place). But if it is not too complex to add and it
 can help adoption for already existing filters, we would give it a go...

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Ticket URL: <https://core.trac.wordpress.org/ticket/51525#comment:34>
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