[wp-trac] [WordPress Trac] #63863: Standardize UTF-8 handling and fallbacks in 6.9

[WordPress Trac]

#63863: Standardize UTF-8 handling and fallbacks in 6.9
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 Reporter:  dmsnell                   |       Owner:  (none)
     Type:  enhancement               |      Status:  new
 Priority:  normal                    |   Milestone:  6.9
Component:  Charset                   |     Version:  trunk
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by dmsnell):

 In [changeset:"60743" 60743]:
 {{{
 #!CommitTicketReference repository="" revision="60743"
 Charset: Create compat-utf8.php module with fallback code.

 This is the second in a series of patches to modernize and standardize
 UTF-8 handling.

 When the fallback UTF-8 validation code was added it was placed inside
 formatting.php; however, that validation logic can be reused for a number
 of related UTF-8 functions. To faciliate this it should move into a new
 location and be loaded early. This patch is the first half of doing that,
 whereby the original fallback function is moved unchanged to the `compat-
 utf8.php` module. The follow-up patch will abstract the UTF-8 scanning
 logic for reuse. Splitting this into a move and a separate change involves
 an extra step, but faciliates tracking the heritage of the code through
 the changes.

 Developed in https://github.com/WordPress/wordpress-develop/pull/9825
 Discussed in https://core.trac.wordpress.org/ticket/63863

 Follow-up to: [60630].

 See #63863.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/63863#comment:23>
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