[wp-trac] [WordPress Trac] #44416: `compact()` will throw notice for undefined variables in PHP 7.3

[WordPress Trac]

#44416: `compact()` will throw notice for undefined variables in PHP 7.3
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 Reporter:  desrosj          |       Owner:  SergeyBiryukov
     Type:  defect (bug)     |      Status:  closed
 Priority:  normal           |   Milestone:  5.0
Component:  General          |     Version:
 Severity:  normal           |  Resolution:  fixed
 Keywords:  php73 fixed-5.0  |     Focuses:
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Comment (by desrosj):

 In [changeset:"44185" 44185]:
 {{{
 #!CommitTicketReference repository="" revision="44185"
 PHP 7.3 Compatibility: Fix compact related notices.

 In PHP 7.3, the `compact()` function has been changed to issue an
 `E_NOTICE` level error if a passed string refers to an unset variable. In
 previous versions of PHP, this notice was silently skipped. This fixes a
 few more instances of unset variables in the WordPress admin.

 The full RFC can be viewed here: https://wiki.php.net/rfc/compact.

 See #44416.
 Fixes #45483.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/44416#comment:26>
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