[wp-trac] [WordPress Trac] #56980: Check that the Normalizer class exists in remove_accents()

[WordPress Trac]

#56980: Check that the Normalizer class exists in remove_accents()
----------------------------+-----------------------
 Reporter:  SergeyBiryukov  |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  6.1.1
Component:  Formatting      |    Version:
 Severity:  normal          |   Keywords:  has-patch
  Focuses:                  |
----------------------------+-----------------------
 Background: #24661, #30130, #35951, #47763, #52654.

 After the 6.1 release, seeing a few errors like this on support forums and
 Google search results:
 {{{
 Uncaught Error: Class 'Normalizer' not found in .../wp-
 includes/formatting.php:1605
 }}}

 Introduced in [53754]. There is a `function_exists( 'normalizer_normalize'
 )` check, but apparently some plugins polyfill that function while the
 `Normalizer` class is still not available, see comment:22:ticket:35951.
 This can happen when the `intl` PHP extension is not loaded.

 I believe we should add a `class_exists( 'Normalizer' )` check here.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56980>
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