[wp-trac] [WordPress Trac] #17904: Multisite has more restrictions on user login character set

[WordPress Trac]

#17904: Multisite has more restrictions on user login character set
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 Reporter:  duck_         |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Future Release
Component:  Multisite     |     Version:  3.0
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |
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Comment (by boonebgorges):

 > I was under the understanding that the restrictions are in place because
 the username is used for the default sitename slug.

 Ah, I didn't know that - can you point to documentation of that fact, or
 are you hypothesizing?

 >  If that can be broken out of the username check and only applied to the
 sitename, that would be okay.

 It'd be straightforward to use, eg, the user_nicename for slugs (that's
 what it's for, after all). The only potential problem I see with that is
 that when there are user_nicename clashes (ip at stenu and ipsten at u, for
 example), they're cleared up with trailing counters (so the second one to
 get there is ipstenu2, etc). That might be less than ideal from a UX point
 of view, because URLs would not match usernames. But this is an edge case,
 and seems to me less important than consistency and flexibility in
 user_login.

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Ticket URL: <http://core.trac.wordpress.org/ticket/17904#comment:15>
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