[wp-trac] [WordPress Trac] #43583: Introduce new PHP cross-version compat function `is_countable()`

[WordPress Trac]

#43583: Introduce new PHP cross-version compat function `is_countable()`
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 Reporter:  jrf                              |       Owner:  SergeyBiryukov
     Type:  enhancement                      |      Status:  reviewing
 Priority:  normal                           |   Milestone:  4.9.6
Component:  General                          |     Version:
 Severity:  normal                           |  Resolution:
 Keywords:  has-patch has-unit-tests commit  |     Focuses:
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Comment (by SergeyBiryukov):

 In [changeset:"43035" 43035]:
 {{{
 #!CommitTicketReference repository="" revision="43035"
 General: Introduce a polyfill for `is_countable()` function added in PHP
 7.3.

 Props jrf, ayeshrajans, desrosj.
 Merges [43034] to the 4.9 branch.
 See #43583.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/43583#comment:14>
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