[wp-trac] [WordPress Trac] #20019: wpmu_validate_blog_signup(): Allow '.' and '-' in blog names

[WordPress Trac]

#20019: wpmu_validate_blog_signup(): Allow '.' and '-' in blog names
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 Reporter:  fo0bar                    |       Owner:
     Type:  enhancement               |      Status:  new
 Priority:  normal                    |   Milestone:  Future Release
Component:  Login and Registration    |     Version:  3.0
 Severity:  normal                    |  Resolution:
 Keywords:  dev-feedback needs-patch  |     Focuses:  multisite
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Comment (by drewnorthup):

 Replying to [comment:15 tlovett1]:
 > I don't understand why wpmu_validate_blog_signup() doesn't allow "-" in
 blogname by default. wp-admin/network/site-new.php runs the domain against
 the following regex `|^([a-zA-Z0-9-])+$|`
 >
 > Perhaps blogname is different than domain name? Can anyone clear this up
 for me.

 They are only 100% the same in non-network installations. (Of the normal
 kind anyway, advanced users can do all sorts of crazy things.) In network
 installations blogname can be related to either a DNS subdomain or a
 portion of a URI path. In the case of "folder" based network setups
 there's really no reason not to allow underscores.

 In fact, I'd be a bit more bold than just allowing underscores (in folders
 / URI paths) and suggest that we should provide the option to use full
 UTF-8 designators (after providing for a warning to the user containing
 information about IDN and internationalized filesystems).(1) Note, I said
 the "option" to do so. In other words, make the filter a configurable
 option (I'd prefer doing so in wp-config.php, as that's potentially faster
 than putting it in the DB) with a safe default.


 (1) Given that just about every "current" filesystem on every "current" OS
 release supports internationalized character sets the warning needn't be
 anything particularly dramatic.

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Ticket URL: <https://core.trac.wordpress.org/ticket/20019#comment:24>
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