Valid user nicenames?

  • Hello. I’ve found that user nicenames, which are used to construct the URL of an author page, cannot be preceded by a hyphen (i.e. https://www.mywpsite.com/author/-username ), because the query string matcher doesn’t match this URL with the author template and leads straight to the 404 page.

    Following this discovery, I searched for a page documenting what symbols are allowed or disallowed in a user nicename and couldn’t find any. Would anyone be able to clarify exactly what characters and symbols are allowed or forbidden in the user nicename? Thank you.

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  • Thread Starter romanc

    (@romanc)

    Does anyone know the answer? If not, where should I look to find the answer? Thank you for your consideration.

    As far as I remember from the sourcecode-digging frenzy I did on the 2.9 release, it should be something like [a-z] + [_] + [-], where the “name” has to start and end with a [a-z].

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