[wp-trac] [WordPress Trac] #57329: Cannot save new custom template when name contains none-Latin characters

[WordPress Trac]

#57329: Cannot save new custom template when name contains none-Latin characters
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 Reporter:  mburridge                |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  normal                   |   Milestone:  Awaiting Review
Component:  REST API                 |     Version:  6.1.1
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch has-unit-      |     Focuses:  javascript,
  tests                              |  administration, rest-api
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Comment (by antonyagrios):

 Minor explanation of the introduced regex:

 Before it was `\w`: This actually matches the following: `a-z`, `A-Z`,
 `0-9` and `_`
 Changing this to `\pL0-9_`, we match the same as before, plus all the
 unicode characters for all the languages mentioned
 [here](https://www.php.net/regexp.reference.unicode).

 I also kept the `0-9_` to match what we had before when we used `\w`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57329#comment:3>
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